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Thanks for your using JAC trucks!Before your using JAC trucks,
please read this operating specification carefully and operate the
trucks according to thespecification to bring JAC trucks' excellent
performance into full play and keep the trucks in a good running
state in along time!JAC trucks are developed and produced jointly
by Anhui Province Automobile Research Institute and Anhui
JianghuaiAutomobile Co., LTD. As well as the road conditions are
taken to fully condition, the domestic and overseas modern design
and producing technique of body and chassis are absorbed and
adopted to let JAC trucks bear good smoothnessand possibility, safe
and reliable brake, easy and light control, convenient usage and
maintenance.As a result of continuous progress in the technique,
JAC trucks are also innovated and improved. All the diagrams
anddata in the specification are based on the latest material when
compiling. We would not inform you after making somemodification on
it. Please forgive us for it.For the reason of hastiness, there may
be some defect in it, and we are honored to receive your suggestion
and advice.The technology consultation telephone number:
0551-2296374The service consultation telephone number:
0551-2296361Anhui Jianghuai Automobile Co.
ANHUI JIANGHUAI AUTOMOBILE CO., LTD.May. 2008
Preface
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Notice! Please read these following items carefully before using
JAC trucks!As regards JAC trucks, please pay attention to these
following items:
1.It is forbidden to make refitting and adding equipment without
our permission, especially on the electric appliance,
brake, steering and so on that will affect the safety system of
the products.
JAC will not take upon herself the loss owing to your refitting
and adding equipment without our permission!
2.when using JAC products, please make timely maintenance and
service according to the service manual to bring the
good performance of your loving truck into full play.
3.Please be sure to go to special repair shop of JAC for service
if finding problems in using; please use genuine parts of
JAC if needing to change parts. JAC will not take upon herself
the loss owing to your not using genuine parts.
4.Any consumer that uses JAC complete vehicle or chassis is
forbidden to change its product identification and name
plate, or the consumer will be responsible for it.
As regards the special purpose chassis of JAC, please pay
attention to the following items:
1. It is forbidden to lengthen or widen the frame of JAC without
JAC's permission, or you will take upon yourself the loss
for it.
2.As regards the refitting on JAC special purpose chassis, all
the refitting companies should not make the refitted mod
els be contradict with the traffic regulations and the relevant
rules of the nation, or JAC will not be responsible for it.
Use of vehicle 1Engine 21Chassis 29IVElectrical equipment
55Vehicle service and maintenance 61Trouble shooting 65Automotive
model table of trucks 85Appendix 89Main files alone with the
vehicle 94
Contents
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1. Use of vehicle(). Use of instruments and apparatuses in the
cab
(). Use of components in the cab
(). Start and running of vehicle
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( ). Use of instrumentsand apparatuses in the cab1. Integrated
switch and instrument clusterIntegrated switch (figure below)which
is composed of steering shaftlock seatignition start lock
andcombination switch lies underneaththe steering wheel.
1) Ignition switchIgnition switch is on the right side
ofintegrated switch. It has four functions: LOCKACCONSTART. Whenthe
key is on the 'LOCK' position,the ignition switch has been
connected to the power source and thelockup of steering gear has
beendisengaged. Turn the key to 'ACC'position clockwise, the
circuit of accessories like radio and tape playercan be connected.
Turn to the 'ON'position, and the instrument circuit isconnected.
If keep on turning until tothe 'START' position, the engine canbe
started. You should unlash thehandle of the key immediately
afterthe engine started. And the key canreturn to the 'ON' position
by the ac
tion of spring. The schematic diagram of ignition switch is as
follows.
2) Combination switch ( left controlhandle)
left control handle
schematic diagram of ignition switchcombinationswitch
ignition switch
schematic diagram of integrated switch
2
HFC1048series trucks
Combination switch is under thecontrol of the multifunction
handle,which lies in the lower left and inferior place of the
steering wheel. It cancontrol small lightheadlightheadlight dimmer
and turning to the left orthe right by two different movementmodes.
The symbol and function ofthe combination switch is as follows: The
OFF symbol indicates thatsmall light and headlight do not
light.(But at this time the high beam canlight if you put up the
handle.) The symbol is the indication of small light. Turn the
controlhandle clockwise by 30 ,and thefrontrear small lights and
the instrument light can light. The symbol is the indica
tion of headlight. Keep on the turningof the left control handle
clockwiseby 30 , the front headlightthe rearsmall light and the
instrument lightcan light. The symbol is the indication of
steering. Forward and backward motion of the control handlecan
operate the left and right turninglamp and the turn light indicator
inthe instrument panel. Push the control handle forward in the
horizontaldirection, the right turning lamp lightsand there has the
indication of turning right in the instrument panel. Onthe other
hand, pull the control handle backward, the left turning lamplights
and there has the indication ofturning left in the instrument
panel. If
the control handle is in the middleposition, then there has no
indicationof turning. Dimmer of headlight: Lift the leftcontrol
handle upwards gently anddo the 'uplift -looseness' motion, itcan
control the dimmer function ofthe headlight. Uplift the handle
once,high beam headlamp lights; loosethe handle, it goes out.
Repeatingthe above action can control thework status of the high
beam headlamp to obtain the purpose of dimmer function when
overtaking orpassing in night.
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43)Combination switch (right controlhandle)
The symbol is indication ofthe scrubber. When the washer control
button on the top of the controlhandle pressed, the cleaning
mixture(using antifreeze fluid in winter) in thewindow washer which
lies in the rightdoorframe and underneath instrument panel can be
spouted to thewindshield glass through the spoutunder the window.
The symbol is indication of
the wiper. Turning the control handleclockwise in the horizontal
directioncan control the wiper. Turn the control handle clockwise
by 12 to the'LO' position, then the wiper workswith low speed. Keep
the turningclockwise for another 12 , the wipercan work with high
speed. When thecontrol handle is on the original position, it can
be disconnected or returned automatically. The symbol is indication
ofexhaust throttle assistant braking. Liftthe right control handle
upwards anddo the 'uplift-looseness' motion. Uplift the handle,
then the switch can beconnected and the indicator lamp inthe
instrument panel lights. Thisshows that exhaust throttle
assistant
braking works. If the acceleratorpedal or the clutch pedal
wasstepped, the exhaust assistant braking should cancelled
automaticallyand the indicator lamp in the instrument panel went
out.4) Other electric appliance switch (seen in the left and below
figure)Other electric appliance switchesmainly include horn button,
dangerwarning switch, fog lamp switch,courtesy lamp switch and
ceilinglight switch. The horn button is in the center ofsteering
wheel, when the button isdepressed it can hoot. The symbol ( the
right andbelow figure) is indication of dangerwarning switch. If
the button is de
right control handle
HFC1048series trucks
5
pressed, the front rear left rightturning lamp flash at the same
timeand send out emergency signal foralarm indication. Press the
button again, reset signal of the switch disconnected. The symbol (
the right andbelow figure) is indication of the foglamp. If
pressed, the fog lamp lights.Press again, the switch resets.
Ceiling light signal indicates thatthe door of the vehicle is shut
closelyor not. When there have one dooropened or did not shut
closely, theceiling lamp lights to remind driver.
5) instrument cluster
danger alarm and fog lamp switch
other electric appliance switch
instrument cluster(air brake)
instrument cluster(hydraulic brake)
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7(). Use of components inthe cabCabBrief description of the
structureThe driver cab is forward control cabwith full metal
enclosed construction.Window glass adopts panoramiccamber
windshield. In order to improve the comfort, side panel withlarger
upside width and raised -roofcab have been adopted. Thereforethe
interior space of the cab can bemore commodious and
comfortable.Effective measures have taken in reduce noise heat
insulation soundinsulation and sealing. For instances,the section
of roof forehead is enclosed and strengthening rib is equipped on
the roof. There have
three asbestos heat insulating mattress on the upside of the
engine.Sealing of the door is double skinconstruction. At the
aspect of safety,softening has done to the main parts,which can
appear knocking easilywith passengers.
The air condition system(chooseto pack)1.Brief introductionThe
automobile air -conditioner andthe automobile instrument panel is
anintegral body which have cold airand warm air machine. It has
manyuseful functions , or example ,tomaking cold air ,warm air and
to removing frost . The air -conditionersystem has four high and
low steps ,
so the customer can choose whatyou like ,for example , can
choosethe same way to sending wind.
2.Operation2.1 To operating the engine2.2 To press the switch
for the air -conditioner , then operating the airvolume .The switch
has four grades ,from left to right ,so the air volume ofair
-conditioner will be more andmore strong.
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Indicators (figure in the above page): Turn indicator lamp( )
whenthe turning control handle is on theleft (right) turning
position, left (right)turning indicator lamp flashes. If thewarning
switch is pressed, the leftand right turning indicator lampsflash
at the same time. High beam indicator lamp( )indicates that the
headlamp is in the
status of high beam or not. When theheadlamp is on the high beam
status, the indicator lamp lights. Fuel warning lamp( ): fuel
levelalarm, when fuel is in shortage, fuelalarm lamp lights.
Parking brake indicator lamp when pull up the parking
brakehandle,the indicator lamp lights. Exhaust assistant brake
indicatorlamp when exhaust assistantbraking operates, the indicator
lamplights. When exhaust assistant brakeis disconnected, the
indicator lampgoes out. Oil pressure indicator lamp indicates low -
pressure warning ofengine oil pressure. When oil pressure is lower
than 0.08-0.1Mpa , the
oil pressure indicator lamp lights.When oil pressure is higher
than thevalue, the oil pressure indicator lampgoes out. Braking
fault indicator lamp when braking fluid is not enough, theindicator
lamp lights. Exhaust assistant brake indicatorlamp when exhaust
assistantbraking operates,the indicator lamplights. When exhaust
assistant brakeis disconnected,the indicator lampgoes out. Fog lamp
indicator lamp when braking fluid is not enough, theindicator lamp
lights. Small light indicator lamp When they workhe indicator
lamplights.
1turn left 2high beam 3turn right4fuel alarm 5parking
brake6charging 7oil pressure alarm8braking fault 9exhaust
assistantbrake 10fog lamp 11small light
indicators
HFC1048series trucks
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82.3 To operating air -conditionerswitches 5,then the compressor
begins to work at this time .The wholesystem will be colder.2.4
Using the cold wind , please putthe temperature adjusting handle 3
tothe COOL position .Using the warmwind ,you should put in the HOT
position .To changing the wind-position,choose the handle 2 can
make thecold (warm) breeze never lead withdirection .If you want to
using thewarm wind ,you should be closeswitch of the air
condition.2.5 To turning the natural wind conversion , then
pressing the handle1can make the natural wind fromoutside of the
car.
3.Caution3.1 You should be avoid the handlein the most cold
position when usingt he air-conditioner in order to prevent
evaporate the machine fromfrost.3.2 Do not park the cars under
thesun .3.3 To using air -conditioners, youshould be close windows
and doorsof the cab.3.4 To cleaning the condenser , youshould be
wash with the compressedair or cold water ,do not wash itstrictly
with the hot water or steam.3.5 The air-conditioner does not usein
winter , however ,you should berevolve compressor once a weekabout
five minutes .In order to main
tain the air -conditioner for normalworked.3.6 If you want to
use the air heater ,the temperature degree of engineshould reach to
70 s above .At 0s the automobile should not park inthe cool
environment, it should beuse antifreeze fluid, in order to
preventing frost radiator and air heater.3.7 If you do not know the
preventions about the air -conditioner , donot switch it , the in
order to preventresults in trouble.The top of cab's ventilating
devicewhich has two ways for it .One is exterior air with indoor
,another one ishouse airiness .
i. Leading exterior air(1) Clockwise the rotary-knob on the
HFC1048series trucks
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top of cab that you definite the topcab is closed.(2) Turn on
the switch to "IN" thenturn on the rotary knob to "OPEN" .
ii. Indoor airiness(1) Clockwise the rotary knob to closing the
ventilator louver.(2) Turn to the switch to "out "which isthe
exhaust gear position.
Door1) The cab door, which have three-
step opening, can improve the convenience for passengers getting
onor off. The opening angle of the doorcan be 30o 57o and 90o. The
former two angles are partially openand the last angle is full
open. On allthe three positions, the door can bein stable
condition. outside door handle
lock button
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2) Outside door handlePull out the outside door handle, andthen
the door can be opened. Insertthe starting switch key into the
doorlock and turn, the door can belocked.3) The door can be locked
outsidewithout the key. First press down thelock button (figure in
the abovepage) at the inner side of the door tothe fixed position,
then pull the outside door handle outwards and atthe same time
close the door.4) Pull out the inside door handle,and the door can
be opened. Afterclosing the door, the door can belocked if the lock
button is presseddown.
Cab seatCab seat can be classified as driverseat assistant
driver seat and rearrow seat. Driver back seat adopts upright seat.
The angle of backrest andthe fore-and-aft position of seat canbe
adjusted. The maximum adjustable angle of the backrest is 56o.The
maximum adjustable distance ofthe seat is 160 mm. The seat
adjustsystem is shown in the right figure.When vehicle is in the
progress ofmaintenance, please clean the trackassembly of the
driver seat, recoat thelithium base grease, and tighten alljoint
nuts again. If found that the cabtrack slide seat has shaking or
blockbecause of distortion, it should be repaired or replaced with
components.
HFC1048series trucks
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Cab tilt lock mechanism
Brief of the structureThe cab has turnover functions , alsohas
turnover and lock up organization . The turnover was composed
oftorsion bar, supporting -axle,
cab'srear bracket and so on.The cabto turnover is used by
torsion power.Lock up system is composed ofright/left lock unit
,turnover lock unit ,short pull rod ,long pull rod ,rearbracket of
cab and so on .All of thisis to lock the cab too tightly.(as
picture)Please read the tilting notes on theleft door of the cab
and on the upperflange of the wheel seriously beforetilting the
cab. The notes are shownin the upper figureUse and maintenanceIn
order to tilting the cab reliably andrunning the vehicle safely,
pleasepay attention to following contents.1Cab tilting method and
relativeattentive notices.
When the vehicle is stopped onthe horizontal road, you should
makesure that there has enough spacearound the cab before tilting.
Or else,the cab may be damaged while tilting.
1.chuck rod2.overturn rod3.safe locking hook
notice
schematic diagram ofcab tilt locking device
support rod assembly
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Pull up the parking brake; pushthe shifting lever into the
neutral position to avoid the self -sliding of thevehicle. The cab
door must be fastenedup. You should take all goods on theinstrument
panel seat and flooraway to avoid the damage of thedoor and the
front windshield. First disengaged the lockingfunction of the cab
locking mechanism when tilting the cab. After the locking function
disengaged, hold the tilting rod with handand pull up the safety
lock hook atthe same time to avoid the suddenuplift of the cab.
Raise the cab slowly until it is tilted to the maximum position,
then
lock it reliably with lock arm on therear bracket. It is shown
in the rightfigure. When lowering the cab down, firsthold the
tilting rod and disengagethe locking function of lock arm onthe
rear bracket, then lower the cabdown slowly. After the safety
locklocked, fasten the locking mechanism.2Inspection and
maintenance Check periodically the rubber padassemblies which are
used tostrengthen the frontrear support, iffind damaged, it should
be replacedinstantly. Check periodically the locking situation of
the locking mechanism, ifinvalidation of locking function
found,
it should be repaired or replaced immediately. If felt arduous
when tilting up thecab or heavy when dropping downthe cab, the
torsion rod is invalid. Replace the torsion rod. When repairing the
chassis, before removing of the cab, disengagethe force of the
torsion rod and operate with following steps.a. Disengage the
locking state, andtilt up the cab to the utmost position.b. Remove
the shaft pin connectedthe rear support rod and the baseboard
support of the cab.c. Push the cab forwards for someangle until the
bolt on the torsion rodarm can be loosened.d. After the bolt
removed, the torsion
HFC1048series trucks
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rod cannot work. Now the cab canbe removed ( The torsion rod can
notbe pulled out).Note: The above -mentioned workmust be done by
three persons atleast because two or three personscannot push the
cab forward afterthe force of the torsion rod is disengaged. Before
reverting the cab to the original position, return the force of
thetorsion rod and operate with following steps:a. Put the tooth
part of the splinewhich is cut at the bottom on oneend of the
torsion rod in alignmentwith '1' position on the support axletube
and the spline tube, and insertthe torsion rod into the support
axle
tube ( for the rod which is pulledout).b. After mount the cab
with supportaxle tube and the left right brackettogether to the
frame, put the '1' ofhub splines on the torsion rod inalignment
with the spline tooth whichis cut at the bottom on the other endof
the torsion rod, cover the hubsplines on the torsion rod and
insertthe spline axle tube into the rightbracket in the cab.c. Tilt
the cab forwards until the bolthole on the torsion rod arm aimed
atthe screwed hole on the right bracketin the cab, screw the bolt
and tightenit.d. Put the cab down slowly, andcheck whether the cab
is on the
state of suspending at the horizontaldirection after dropped
down. If normally, then lock the cab. If find invalidation of the
torsionrod, when replacing, operates according to .
(). Starting and running ofthe vehicle1. Starting of the
vehicle1Starting of the engineWhen starting the engine, put
theshift bar on the neutral position, turnon the ignition switch,
check hornsinstruments on the instrument panelturning lamps braking
lamps theangle and position of the rear viewmirror. Routine
start
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Turn the key to the START position(shown in the right figure),
the enginecan start. After starting, loosen theaccelerator pedal
immediately andkeep the engine working in lowspeed. Depressing the
acceleratorpedal violently is forbidden. Start in winterWhen the
weather is very cold, thestart of diesel engine can take following
measures:a. Cooling water use hot water, andunclose the drain
switch whenadding hot water. When the hot waterflowed out and the
engine body became warmer, close the drain switch.
b. Heat up the oil up to 8090 ,and then add it into the oil
pan.After starting the engine, check theoperating state of the
engine and instruments at different rotating speed.Especially check
the oil pressure.Check if there have leakage of water oil and gas,
check whether the
oil level is normal and the enginehave abnormal noise. Check
whetherthe color of exhaust is normal. After starting the engine,
do notdepress the accelerator pedal violently, loosen the
accelerator pedal tokeep the engine operating on idle forsome time.
After the temperature ofengine rises and the engine operatesstably,
uplift the clutch pedal slowly. Generally after the temperature
ofengine become more than 60 andthe operating (sound) of the
enginecomponentsthe reading of instruments are normal, the vehicle
canrun. Do not run the vehicle in lowtemperature to avoid intense
wear ofthe engine.2Starting and shifting of the vehicle
starting switch
HFC1048series trucks
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After engine operates normally, depress the clutch pedal, shift
into lowgear, loosen the parking brake, andpress the horn once.
Making surethat the vehicle can be operatedsafely, loosen the
clutch pedal slowlyand depress the accelerator pedalproperly at the
same time to start thevehicle. After starting the vehicle, thefoot
should get away from the clutchpedal. Do not keep the foot on
thepedal to avoid the burning out of theclutch friction disc.Note:
Do not let the vehicle runningin first or second gear for long
timeto prevent from increasing the wearand the fuel consumption.
Loosenthe clutch pedal rapidly or depressthe accelerator pedal
insufficiently,
the engine can stop.When running the vehicle, shift thegear
according to the change ofroad and landform. If find that theengine
power is in abundance andthe rotating speed rises, it
illustratesthat the primary gear is not appropriate, the vehicle
should be shifted tothe next fast gear in time. After shifting, if
not finding shortage of powerand chattering of transmission,
theshifting operation can be consideredright. If find shortage of
power or thevehicle speed decreases, the vehicleshould be shifted
to a low gear. If thevehicle runs normally after shifting,the
shifting into low gear is right.for safety, when
swervepassingbridge and meeting, the vehicle can
run in moderate speed. On betterrunning condition, the vehicle
can operate in fast gear, and at this time thevehicle speed is
high, the fuel consumption is low, the economy of fuelis good.When
shifting, do not just see theshifting lever. You should watch
forwards, hold the steering wheelsteadily with your left hand, let
thecenter of the palm of your right handstuck to the top part of
the shiftinglever and push or pull it to the needed position with
the force of yourright wrist.
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2.Running swerve turnaro -und backing and braking ofthe
vehicle1) RunningKeep enough distance to the foregoing vehicle when
running on flatroad. Select vehicle speed accordingto the vehicle
modelmission andconcrete condition of road, generallyselect the
speed of 5070 km/h.Let the vehicle running in the first orsecond
gear when starting, upgrading under heavy load and running onbumpy
road or on the road havingobstacles. But the vehicle can notrunning
in the first or second geartoo long in normally running.
Whenupgrading with heavy load, shift theshifting lever into low
gear to avoid
overloading of the engine.When running, do not increase or
decrease the vehicle speed abruptlyand not shake the steering
wheelwithout reason, listen whether there isabnormal noise or not,
check thereading and indicator lamp of all instruments for
normalization. If findabnormal noise or abnormal events,stop the
vehicle immediately andcheck it, take necessary adjustmentand
repair.When downgrading, do not stall theengine. When downgrading
steepramp, shift the shifting lever into lowgear and take braking
operation atintervals to avoid the over fast of thevehicle
speed.When running across shallow river or
loblolly, prevent the water from entering into air intake lines
of the enginerear axles and transmission case.Check rear axles and
transmissioncase for entering water after paddling. If find water,
drain it and addgear oil with specified quantity. Afterpaddling,
the vehicle can not run inhigh speed. You should depress thebraking
pedal every now and then toresume the braking performance assoon as
possible.When running on the ice or snowroad, run with steady
speed. Do nottake emergency braking and not turnthe steering wheel
fiercely to avoidskidding danger. Keep long safetydistance from the
foregoing vehicle.When running in heavy rain, drive the
HFC1048series trucks
17
vehicle more carefully to avoid decreasing the braking
performance ofthe brake because of moist. Do nottake emergency
braking operation toavoid the danger of skidding.2) SwerveSwerve of
the vehicle produces centrifugal force which can be biggerwhen the
vehicle speed becomeshigher. The force can bring turningover in the
transverse direction inserious condition. Therefore, at the50100
meters position before turning the vehicle, you should ring thehorn
turn on the turning lamp andreduce the vehicle speed. Whenrunning
on the freezing and muddyroad or in the weather of heavy rainfog
wind sand, reduce the vehicle
speed to less than 10 km/h, swervethe vehicle slowly alongside
the rightside of the road. When swerving, turnthe steering wheel
uniformly according to the situation of road, theswerving track
should be transitedsmoothly, the turning motion shouldnot be too
great or too small. Do notturn or return the steering
wheelsuddenly. Try your best to avoid taking braking operation
while turningthe steering wheel, especially emergency braking.When
steering, if found skidding offront wheels, put up the
acceleratorpedal and turn the steering wheel inthe contrary
direction; if found skidding of rear wheels, turn the steeringwheel
properly along the skidding
direction, and after the skiddingstops, correct the running
direction.3) Turning aroundWhen turning around for 180, selectthe
squarelarge -scale crossing orflat broad road which have little
traffic flux and turn around the vehicle ata time along the running
direction. Atthe 50100 meters position in front ofthe turning spot,
reduce the vehiclespeed, shift into low gear and sendout the
turning around signal.When turning around with runningforwards and
backwards, first sendout the turning around signal, reducethe
vehicle speed and run towardsthe right side of road. When
approaching the preset spot for turningaround, observe the
situation of road,
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18
turn the steering wheel to the left extreme position rapidly and
let the vehicle running to the left side of roadslowly. When
approaching the roadside, return the steering wheelrapidly. After
observing the situationbehind the vehicle, start and turnaround the
vehicle, turn the steeringwheel to the right extreme position atthe
same time. When approachingthe roadside, return the steeringwheel
rapidly and stop the vehicle. Ifthe turning around operation can
notbe done once time, repeat the aboveoperations.4) BackingThe
operation of shifting into reversegear or shifting from reverse
gear toonward gear can be done after the
vehicle is stopped completely. Aftershifting into the reverse
gear, theback -up lamp lights. The vehiclespeed must be less than 5
km/hwhen backing. If the driver can notdiscern the situation behind
the vehicle because the vehicle is loadingor other reasons, the
backing operation must be commanded by oneperson who is outside the
vehicle.Do not back the vehicle blindly.5) Parking of the vehicle
and stop ofthe engineWhen preparing to park the vehicle,the vehicle
speed reduces or the vehicle slides out of gear and indicateswith
turning lamp. After the vehicleparked, pull up the parking
brakelever. If the vehicle must be parked
on the road for some reason, parkthe vehicle near the roadside
and notpark the vehicle on the running lane.Under the exceptional
condition likebreaking down in the middle of road,two caution
plates should be placedon the position of 200 meters in frontof and
behind of the vehicle.Avoid parking on the ramp. If thevehicle must
be parked on the ramp,pull up the parking brake lever to theextreme
position, shift into low gearand block the vehicle with
triangularchocks or stones to prevent it fromsliding. Note: Make
sure that theparking brake can work reliably whenparking on the
ramp, at the sametime turn on the emergency warningsignal indicator
lamp.
HFC1048series trucks
19
After parking, especially after the engine operates with heavy
load, donot stall the engine immediately, butkeep the engine
operating in lowspeed for several minutes. After thetemperature of
water decreases lessthan 70, then stop the engine.When parking
midway in winter, takethe heat preservation and antifreezing
measures for the engine. Preventthe oil tank from insolation in
summer.After the vehicle runs a day, routineservice and inspection
should bedone on the entire vehicle.
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.Engine(). Inlet air exhaust systems(). Cooling system
(). Accelerating transmission system
(). Fuel supply system
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NoticeThe details of the engine structure assembling adjustment
using and maintenance can be consulted in the operating
specification of relevant engines.The position of the engine
cardCauseThe card of engine is on the top cylinder head or on the
side of engine .It writes the model number of engine ,sequence
number ,declared power ,declared speed and the factory date .Pay
attention to find it in order to using itclearly and
convenience.(as picture)
HFC1048series trucks
23
(). Inlet air exhaust systems1. Brief description of the
structureInlet system includes air inlet pipeassembly air filter
assembly intakemanifold. Exhaust system includesexhaust pipe
muffler and exhausttailpipeUse and maintance1) The service life of
the engine hasgreat relationship to the workmanshipof the air
filter. Absolutely forbid thatthe engine works without air filter
oron the condition that the air filter isdisabled. Taking the
intake openingof air filter as the original intake opening is
forbidden.
2) For every 1000km running, checkthe inlet and exhaust manifold
for thefollowing:a. Check nuts for looseness, whentightening the
nut on the inlet andexhaust manifold, the torsion forceshould be
equable, or else the airleakage can occur.b. Check the inlet and
exhaust manifold for crack and hole, check thegasket for damage and
erosion, iffound, replace it with a new one.
Air filterThe function of air filter is to filter outthe dust
and the sand in the air entered into the engine.Air filter is
cyclone dust gathering aircleaner with paper filter element. After
external air enters into the air filter
through the air inlet pipe, larger dustparticle can be separated
from theair by the function of cyclone vane,then can be thrown into
the dustgathering plate, the separated airkeep on moving and enter
into thecylinder by the filtering function ofthe paper element.For
every 1000km running, checkand maintain the air filter. When
running in the condition of excessivedust, the running mileage
interval forinspection and maintenance shouldbe shortened
suitably.Cleaning of the air filter:1) Remove the dish-shaped nut
fromthe end cover. Take away the endcover, remove the inner nut and
takeoff the filter element assembly.
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24
2) Clean the cover cap and the innerpart of the housing with dry
andclean cloth.When cleaning, do not letthe moisture enter into the
air filter.
3) To cleaning dust unloading valvein order to usage well .4)
Tight and close the rubber ofconnected brake .5) Clean the air
filter element: clearaway the dry dirt or dust with compressed air
gun (air pressure shouldbe less than 690kpa),blow from theinner
side of filter element towardsoutside. Do not clear away the dirt
orthe dust with beating or knocking.
(). Cooling system1.Brief description of the structureCooling
system is closed water cooling pressure cycle type. It is composed
of radiatorcoolingfiuidthermostat fan bulge radiator and water
inlet and outlet pipes of radiator.
The concrete structure and type ofthe cooling system components
canbe consulted in detail in the operating specification of
relevant engines.
2.Using and maintenance of co-oling system1) Recommend using
long effectiveantifreeze preservative liquid for cooling fluid. In
the north, it can avoid thedamage of engine because of thefreezing
of cooling fluid in winter; inthe south, it can increase the
boilingpoint of cooling fluid in summer toavoid the damage of
engine overheating because of air resistance inhigh temperature.2)
Before dispatch the vehicle everytime, check the liquid level in
the radiator and in the bulge radiator, if
1cab 2vent hose (1) of the air filter3intermediate connecting
pipe4connection board5vent hose of the air filter6right
longitudinal member of the frame7air filter bracket8intake pipeline
of the air filter9connecting hose 10air filter
schematic diagram of air filter
HFC1048series trucks
25
found it is not enough, add liquid tothe specified height.3)
Drainage of cooling system. Incold region and in winter, without
using antifreeze preservative liquid, iflong time parking or
receiving thevehicle everyday, the cooling systemmust be drained.
And you shouldopen the water filler cap of the radiator to avoid
the incomplete drainageof cooling water.4) After engine operating
for longtime, furring can produce in thecooling water and it should
becleaned in time. Clean it with following method: mix 700 800
gramcaustic soda and 150 gramkerosene, add the mixture liquid
intothe cooling water, run in medium
speed for 5 10 minutes, then afterstopping for 1012 hours,
restart theengine and run for 10 15 minutes.Then drain the aqueous
solution andclean the cooling system withcleaned water.
3.Advertent proceedings in usinglong effective antifreeze
preservative liquid1) Choose suitable antifreeze liquidaccording to
the minimum temperature of the region, if the minimumtemperature of
the region is -25 ,antifreeze liquid whose solidifyingpoint is -30
should be chosen.2) When compensating antifreezepreservative
liquid, choose the samemodel to avoid deposition.3) If find
deterioration of antifreeze
preservative liquid, replace it entirelyat once. The color of
antifreeze liquidis green or blue, if having deteriorated, the
color should be dull red because of impurity infiltration.
To adjusting the degree of tension of the fan belt1.The
disadvantage of engine istighten or lax the fan belt .Before useit
please read the operating specification .2.The way of adjustment
:firstly toadjusting blots ,secondly to adjusting,third to
adjusting the tight ofwedge -shaped belt .Using fingerpress way ,to
pressing for 98/N .Thestandard of crankshaft pulley is 2531mm .The
standard of fan belt is78mm.
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26
() Accelerating transmission system1.Brief description of the
structure
Accelerating transmission equipmentis composed of accelerator
pedalmechanism accelerator wire drawing and acceleration governor
arm ofthe engine. It is shown in the figure inthe above page.When
depress the pedal, drivingmedium of the mechanism pull thewire
drawing, control the openingextent of the accelerator to increaseor
decrease the speed1 Accelerator pedal mechanism:Accelerator
mechanism take thenewest structure of ISUZU truck. Itoperates
simply and reliably and hasaccelerating wire drawing and
handthrottle wire drawing; the pedal is thestructure with injected
molding and ithas the trait of convenient assem
bling and little operating noise.2Accelerating wire drawing:It
operates by the soft wire drawing.And it has traits of reliable
structureconvenient layout little frictional resistance and stable
transmission.3Hand throttle wire drawing:Using with the foot
throttle can quicken the preheating of the engine or increase the
idling speed.
2.Using and adjustment1) Check the chucking position of
thelinkage rod and the acceleratormechanism for rightness and
reliability, check the direction of the wiredrawing for straight
and check onthe cornering for smooth transition.2) The pedal should
be depressedeasily and to the extreme position
1stalling wire drawing 2assemblyof accelerator mechanism and
pedal3front floor of the cab4acceleration wire drawing5stalling
oscillating arm of the engine6acceleration oscillating arm of
theengine 7frame
schematic diagram of acceleratingtransmission equipment
HFC1048series trucks
27
without jamming. When releasing thepedal, it should be returned
freely.3) When depressing the pedal, if thefree play is too big or
the openingextent of the accelerator is not enough, adjust the
position of bolts.
Fuel supply system1.Brief description of the structureFuel
supply system is composed offuel tank fuel filter fuel
pumpfuelinlet line and fuel return line.The function of the fuel
supply system is to inject the specified quantitydiesel fuel of
specified pressure andgood atomization into the cylinder atthe
correct time with definite intervalof injection according to the
operating requirement, and take good com
pression ignition with the air rapidly.Its operating state has
important influence to the power and economyperformance of the
engine.1) Coarse cleanerthe car's fuel piping have a DX150T spin-on
oil filterflow volume is 1.5L/min. It can transition impurity and
can separate waterand oil
2) Fuel tank:. The tank install the filtergauze inside the fuel
filler port to prevent impurity of large particle entering into the
fuel tank, set oil drainplug on the bottommost position ofthe fuel
tank to drain the deposit andwater on the bottom of tank
whencleaning the fuel tank.
Using and maintenance of coar-se cleaner1To tight all the pipe
line .2When the DX150Tprecipitator wor-ks for 1000/km and 200hours,
to waterproofing.
diesel precipitator
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29
ChassisClutch
Transmission
Drive shaft
Rear axle
Frame
Suspension set
Front axle
Steering system
Brake system
Wheel & Spare wheel riser
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31
lowed, or else, it can result in thedisability of the pedal
deficiency ofthe effective travel and incompleterelease of the
clutch etc. So theclutch can not work normally. Thework of air
bleeding should be completed by two persons in the best,one person
depress the clutch pedalin the cab, the other bleed the air inthe
wheel cylinder. The schematicdiagram of air bleeding for the
clutchwheel cylinder is shown .Take off the rubber cap of the
airbleed screw on the wheel cylinder,link a plastic pipe on the air
bleedscrew, put the other end of the pipeinto the container filled
with brakefluid, depress the clutch pedal several times, fill the
master cylinder and
hydraulic pipeline with brake fluid,then loosen the air bleed
screw, airbubble can be puffed from the oilring if there have air
in the pipeline.Repeat the above-mentioned operation until the air
bubble disappear .
Maintenance and adjustmentLong time use or incorrect adjustment
and incomplete air bleeding ofthe clutch can bring the halfway
release of the clutch, let the clutch onthe half contact state for
long time,aggravate the wear of the clutchpressure plate and
friction linings.The decrepitation burnt and exfoliation of the
friction lining, and theburnout of the release bearing alsocan
result in the abnormal operationof the clutch. When maintenance,
allkinds of clearance of the clutch mustbe adjusted. When doing the
thirdmaintenance for the trucks ,you mustclean general/dispant
cylinder andliquid reservoir tank ,then fill greaseto hole of
disengaging shaft.
1release fork 2dust cover3copper washer 4wheel cylinder5wrench
6soft plastic pipe7container 8braking
Clutch1.Brief description of the structureThe clutch equipped
for this seriestruck is single -plate dry type diaphragm spring
clutch, outside diameter of the driven plate is 254.The hydraulic
control unit of theclutch is composed of the clutchpedaloil storage
cup release cylinder (master cylinder) wheel cylinderand oil pipe.
It is shown in the belowfigure.Adjustment of the clutch operating
system1Adjust the limit screw of the clutchpedal (below figure) to
make surethat the free play of the pedal is 35mm.
2Adjust the mas ter cylinder of theclutch: loosen the locknut on
thepush rod of the master cylinder, rotate the end of the push rod
to contact gently the with piston of themaster cylinder, then
rotate the pushrod for 3/4 circle in the contrary direction,
tighten the locknut of thepush rod, now the clearance between the
push rod and the piston isabout 0.51mm.3Adjust wheel cylinder of
the clutchTake off the return spring of the release fork, push the
wheel cylinderpiston to the bottom of the cylinder,loosen the
locknut on the push rod,push the release fork towards thebackside
of the engine to the position where the release bearing andthe
release fork contact barely, turn
the spherical nut until it contacts withthe release fork, then
turn back thespherical nut on the push rod for 3circles, tighten
the nut, install the return spring of the release fork.
4Bleed air from wheel cylinder ofthe clutchHaving air or oil
leakage in the hydraulic pipeline of the clutch is unal
clutch pedal
30
HFC1048series trucks
-
Transmission1.Brief description of the structureThe transmission
equipped for thechassis of this series truck is
manualdiscontinuously variable transmissionwith fixed shaft gear,
and it has fivedriving gear and one reverse gear.The synchronizer
has been equippedon the second third fourth and fifthgear. And the
synchronizer is synchromesh gear system. The synchronizer for the
first gear and the reversegear is holding mesh gear. Using ofthe
synchronizer on the transmissioncan make the shifting operation
conveniently, decrease the wear andshock on the gear end, extend
theservice life of the gear tooth, shorten
the shifting time, increase the average vehicle speed and reduce
theworking intensity of the driver. Thegear shifting operation is
accomplished with the shifting control device of the transmission,
which isshown in the figure on the next page.
2.Shifting control device of thetransmissionThe shifting control
device of thetransmission is long distance soft cable type with
high floor and short lever,and it take two flexible shaft to
implement the gear selecting and shiftingwhich is shown in the
figure on thenext page. It is composed of operating lever
seatflexible shaft for gearselecting or shifting and the
bracket.The core shaft of the interior flexible
shaft is steel cable, the operation ofgear selecting or shifting
is completedby the pushing or pulling motion of thesteel cable. The
ball on the flexibleshaft and adjusting screw are used foradjusting
the total length of the flexibleshaft to ensure that the gear
selectingor shifting can be to the correct position. There have
symbols of each gearon the control handle of the transmission, it
is shown in the below figure.
32
control handle of transmission
HFC1048series trucks
33
3.Using and maintenance1) If found the gear shifting can
notoperate or operates difficultly whenthe engine is not working,
it showsthat the gear shifting lever (or theflexible shaft) have
bad adjustmentor the bolt becomes loose, now youmust adjust the
control lever (or theflexible shaft), check and tighten every bolt
and every nut.2) If found out-of-gear when runningon the rough
road, the control lever(or the flexible shaft) have bad adjustment,
and it should be adjustedcorrectly.3) If found free play of the
controllever too large, check and tightenevery bolt and every
nut.4) Do not take gear shifting operation
when the engine work at over fastspeed to avoid accelerating the
wearof the synchronizer.5) When shifting, the force should
begentle. The hand force must be acted on the control lever until
the gearreaches the correct position. Shiftingwith flap of one push
and one loosenis inappropriate and the shifting operation can not
be accomplishedeasily in this way.6) Only after the vehicle stop
andkeep steady, the shifting from drivinggear to reverse gear or
from reversegear to driving gear can be done, orelse, the gear can
be damaged.7) As the fifth gear is over -speedgear, in order to
avoid the damageof the overspeed gear spoke , its
1 gear shift control lever2dust cover 3handle4floor of the
cab5flexible shaft for gear selecting6transmission rocker arm for
gearselecting7side bracket for gear selecting8flexible shaft for
gear shifting9fixed bracket of the gear shiftingflexible
shaft10rear cover of the clutch11transmission rocker arm for
gearshiftingschematic diagram of the transmission
gear shift control device
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34
running speed is under 50 km/h, thefifth gear can be used .8)
When running, if find there is abnormal noise in the
transmission,stop the vehicle and check it, eliminate the
malfunction.9) When sliding on the downgrade,stalling of the engine
is unallowed,starting the engine with the inertia ofsliding on the
downgrade is forbidden to avoid the damage of the gearand the
synchronizer.10) In the running -in period of thenew vehicle,
because the metalchipping which was produced by thefrictional
function between new partsis bad to components in the transmission,
especially to the life of theconical ring on the synchronizer,
so
the lubricating oil should be replacedafter the running -in
period of thenew vehicle expires. Under generalcondition, for every
6000 km running,replace the lubricating oil once.When replacing the
lubricating oil,first drain the oil in the transmission,prop up the
rear axle, shift the transmission into the reverse gear, addthe
kerosene, rotate the transmissionfor 23 minutes, then drain the
kero-sene, add the pure gear oil.11 Check the oil level in the
transmission frequently, if found the levelis under the lower edge
surface ofthe oil filler bolt hole, sufficient oilshould be
added.12 Check the outside bolt of thetransmission and the flange
of the
second shaft for tightness and theoperating state of the
component inthe transmission frequently, becausethe vent plug is
blocked by dust andpressure in the transmission increases, the oil
seepage or leakage maybe found, so the vent plug should becleaned
periodically.13 The movement parts of shiftingoperation should be
kept good lubricating, or else, the shifting operationmay become
difficult because of thewear of the movement parts. If foundthe
position of gear selecting is incorrect, or gear shifting become
difficult or the transmission is out ofgear automatically in using,
firstlyyou should readjust the gear selecting and gear shifting
mechanism.
HFC1048series trucks
35
() Drive shaft1.General structureThe two-piece driveshaft,
connectedwith transmission on the front endand with rear axle on
the back end.
2.Use & Inspection1Driveshaft has been counterpoisedin
factory, it should be ensured not tobe impacted in use and not to
beknocked and stacked in disassembleand carry. Replace if the shaft
is distorted or the balancer is desquamated, otherwise there will
be vibration,noise, and extra impact in travel, itcan damage power
train and endanger driver.2Regularly check the cross shaftneedle
bearing, check the sealing of
the slide spline and replace the oilseal when necessary3The
first maintenance ,to fill greaseto universal joint ,slide spline
,oil pistol ,driving spindle and quickly tightthe blot in order to
sliding the universal joint .According to moment ratioto checking
and tighten driving spindle and the middle parts of
bearingblots.The second maintenance ,to checking is there anything
fall down aboutthe dirt proof boot ; is there anyproblems about
move the universaljoint .when cross shaft in the middleof the
needle bearing .The distancewould not be very large .If it is
toolarge ,you would be disassemble theuniversal joint and you can
depend
on what you need to changing needle bearing universal joint.When
you do the third maintenance ,should be disassemble the
drivingspindle .Pay attention to sign onflange ,cross shaft ,link
fork, slidespline in order to mounting .Whenyou finished all the
maintenances ,please do the blance check , thestandard of dyramic
blance is 2750r/min.The amount of unbalance ismore than 144g.cmIV
Rear axleThe brief of structure Single reduction rear axle ,as the
final part ofpower train of truck ,is the drivingaxle ,and it is
composed of finaldrive and differential and axle housing .Final
drive can not only change
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36
the direction of driving force ,but alsoreduce the rotate speed
.It is composed of drive pinion and drivengear and final drive .The
drive pinionis composed with drive shaft ,whoseend with spline is
connected with universal joint assembly by couplingflange .Center
support is mounted intwo opposite conical bearing ,so thatit can
suffer not only radical bearing ,but also axial force. Drive
pinion,whose small-end journal mounted indirect tapered roller
bearing, can only support radial force. It is fixed onthe flange
which located on top leftof differential case by several bolts.A
differential, composed of differential case and cross and four side
pinions, let the left wheel rotate at a dif
ferent speed from the right wheel.Rear one -piece banjo style
axlehousing is made by means of welding punched armor plate.Meshing
of tooth face and clearanceadjustment of final drive(1) Check drive
pinion bearing forpretension .The pretightening force ofdrive
pinion bearing should be adjusted. Measuring in the bolt hole
ofdrive pinion bearing case, the tangential pull should be
15~30N.(2)The pretightening force of drivepinion bearing can be
adjusted bymeans of adding and reducing adjusting shim. Add shim
can decreasefriction torque, while reducing shimcan increase it.
There are three kindof shim according to thickness
(0.40mm, 0.45mm, 0.5mm).(3) Check final drive for meshing
between drive pinion and driven gear.The contact area and side play
between drive pinion and driven gearcan be adjusted by means of
adjusting shim and adjusting collar of differential bearing. There
are threekind of shim is 0.30mm and 0.4mm0.45mm, and the 0.5mm
Normally,the clearance between these twogears is 0.15~0.25mm, while
the sideplay ranges under 0.07mm. To adjustside play, measure four
points withequal angle around the driven gear,and the gauge outfit
of micrometershould be in a vertical position. Toadjust tooth
contact area, driven gearshould be coated with red lead at
HFC1048series trucks
37
three points, and 2 ~3 teeth shouldcoated at every point. Then
rotategears clockwise and anti -clockwiseto get the trace of
contact area (seethe right figure).The teeth area is not suit the
figure(a)which should be adjust it .If thetrace is slanting to the
convex orconcave then adding the shims ;ifthe trace is slanting to
the convex orconcave ,then reducing the shims.Normal trace should
be near thesmall end ,as figure (a):Add shim iftrace near the
convex or concavetooth root ,as figure (b)Reduce shimif trace near
convex or concave toothtop , as figure (c).Adjust the wheel hub
bearing of rearaxle: to locking bearing and nut ,then
release1 31 4circle Tighten theforce moment to 490588N.m
Use & maintenance1Lubricate for hyperbola bevel gearis very
strict, can be only specifiedgear oil. Don't use or mix with
othergear oil, or will result in quickenedscratch and wear.2Don't
remove or adjust the gears
and bearings of final drive, for theyhave been matched and
adjusted infactory. Do these only when gearworn and free play is
beyond thelimit value, or when bearing axialclearance is beyond the
limit, orwhen some of parts damaged.3Clean the vent plug
regularly,make sure that ventilation is expedite. A jammed air
drain can bringhigher air pressure in rear axle, andit will result
in lubricant leak from thedrive pinion seal and other
weldingline.4Check the lubricant level in axlehousing regularly.
Check the lubricant for quality regularly, and replaceif the chroma
and viscosity is abnormal.
-
5Finished the third maintenance,disassemble the back cover
.Thenclean cavity and main reducer axle .To tight the fore moment
nut andblot.
VFrameThe brief of structure :This kind oftruck's chassis is
across structureUse & Maintenance :Using longitudinal beam and
cross beam is to fixedthe frame .Using weld and screwthread to
connecting .So ,keep all theparts well to exerting the advantageof
the frame .When doing the thirdmaintenance checking , if the
screwsare lax that should be tight it. If thecross beam have
something wrong ,should be mend it .The reason of damage the frame
is
overweight , parking position androad and so on. .So ,must
followingthe request to driving .
Suspension setGeneral Structure: The suspension ofthis series of
trucks is composed ofmultiply variable leaf spring bidirectional
hydraulic telescopic shock absorber and transverse stabilizer.
Rearleaf spring is composed of mainspring and secondary spring,
itsstiffness changes little by little, sothat vehicle is more
comfortable forride.
38
1. Front leaf spring 2. Front U bolt3. bumper 4. Front shackle5.
Upper bracket of front suspension6. Front absorber 7.nut
front suspension assembly
1Frame 2Rear leaf spring3Rear center bolt 4Rear
absorber5Secondary spring bracket6Rear shackle clamp
rear suspension assembly
HFC1048series trucks
39
2. Use & Maintain leaf spring1)At the beginning of
running-in period, check the nut on U -type fastening bolt and
tighten it with specified torque when trochometer pointsto 200km
and 500km.2)After running-in period, tighten thenut on U -type
fastening bolt withspecified torque (with vehicle fullyloaded). Do
it also when leaf springis replaced or reset.3)Tighten the nut on
U-type fastening bolt with specified torque (withvehicle fully
loaded) every 2000 ~3000km.4) The first maintenanceCheck andtighten
bolts and nuts in your touchon suspension. Check the rubberparts on
the suspension and replace
if too much wear.5At the second maintenance, doingthe first
maintenance items .Thendisassemble and lubricant the springof plate
, at the same time to checking anti-roll stabilizer .6At the third
maintenance, doingthe second maintenance items . Thendisassemble
all of the rubber tochanging the news.7)Take notice of the
orientation whenreplace leaf spring or operate on thecenter bolt.
Tighten each nut first,then tighten nuts on front U -typefastening
bolt with specified torquebefore tighten the rear ones.
3. Use & Check absorber1 Check the absorber for temperature
after running a length on bad
road surface (commonly more than10km). Absorber don't have
resistance if the temperature lower thancondition temperature; if
one absorber have much lower temperaturethan the symmetrical one,
the lowerone's resistance is much moresmaller. Lower resistance
result fromlack in oil or from damage of someimportant part, and
the absorber thatlack in resistance should be removedto inspect.2
Check the absorber for oil leak ifcontinuous abnormal vibration is
detected. Oil leak should be dealt withon time, so that the
absorber canwork normally.3 Check absorber when maintainingvehicle.
To check absorber, stick up
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40
it and hold its lower end by vise,then pull and press it for
severaltimes. Normally the resistance isbigger when pulled,
otherwise theabsorber is damaged or lack in oil.In the case , to
changing and mending the parts ,then fill oil into shockabsorber
.In order to absorber parts.4 Always replace the oil seal whenyou
replace absorber rod. Don't disassemble parts such as valve if
unnecessary.5At the third maintenance ,disassemble the shock
absorber andchanging the new oil .Do not cleanthe shock
absorber.
Front axle1. General structureFront axle assembly is composed
of
front axle, steering knuckle, steeringknuckle king pin, hub and
tie rod.See the next figure.The front axle is I -beam. The
toeing-in is 3~6mm (diagonal tire) and1~3mm (radial tire). Proper
orientation can make sure the vehicle stableand easy to control, so
that canlessen driver's fatigue and slower tirewear.
2. Adjustment1) Adjustment of front hub bearing.To adjust front
hub bearing in axialretightening force, tighten fasteningnut with
wrench, and loosen knucklenut for about 120o. Rotate the
hubclockwise and anti-clockwise, makesure that roller against the
taperedface of bearing outer race properly,then tighten nut to the
position wherethe rabbet aims the split pin hole.Check the hub if
it can rotate freelyand don't swing a lot. Now, distortthe split
pin and fix it.2) Adjustment of clearance betweenknuckle and front
axle. The clearanceis adjusted via adjusting shim, itshould less
than 0.1mm.3) Adjustment of toeing-in. The toe
1Front hub 2Brake drum3Steering knuckle 4King pin5Pitman arm
6Front axle7Tie rod
front axle assembly
HFC1048series trucks
41
ing-in can be adjusted via adjustingtie rod. Park the vehicle on
a flatground, jack up its header and orientfront wheels just as
vehicle run forward. Loosen locking nuts of tie rod,rotate the tie
rod utile the toeing-in fitthe specified size.
Use & Maintenance1) The first maintenance .When doingthe
first maintenance ,check the nuttightly.2) When doing the second
maintenance to checking damage aboutsteering knuckle , steering
knucklearm ;to checking about steeringknuckle pin bearing ;to
checkingabout the drag rod .According to theregulate ,disassembly
wheel hub andfill grease with it.
3) when doing the third maintenance,to disassembly the front
axle thencleaning and checking it.a) If the distance between
steeringknuckle and front axle is very large ,should put a thrust
shim on it to adjusting .The distance is 0.1mm to begood.b) When
the steering knuckle pinand the bush's distance is 0.15mm,then to
change new ones.The damage distance of the steering knucklepin is
to 0.07mm,changing new ones.c) The damage of steering drag rodball
end and ball end is too big ,thenchange the new ones.d) When find
out the damage of oilseal of the wheel hub , then changethe new
ones .
Steering systemGeneral StructureThe steering system of this
series of truck is powersteering system.
Power steeringThe steering system composed ofsteering control
mechanism, linkagemechanism whole power steeringgearpower steering
pump andpipeline.The energy source of the steeringsystem is
depended on driver'sphysical strength and power of engine .In some
emergent cases aboutsteering system that the driver cancontrol the
direction .To comparewith some common machine steeringsystem , the
power steering systemis very sensitive and secure.
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42
Operation Inspection for SteeringMechanism1) Put front wheels on
a swivel table.2) Rotate steering wheel clockwiseand anti
-clockwise to its limit position, to detect if it is fluent.3) Let
engine run in idle speed andcheck steering wheel for free play.The
limit value of this free play is 15~35mm. Rotate the adjusting
screwclockwise to decrease the free play,while rotate anti
-clockwise to increase.4) When engine run in idle speed,the torque
of steering wheel shouldbe around 19.6N.5)When staring the engine
to turningsteering wheel to two sides for several times .When
removing the air from
the engine ,then fill oil into it.6Turing the steering wheel to
thefront.7Turn off the engine to checking oil.If it need oil, then
fill it.Note:To checking is steering oil on ahigh temperature .If
it has some troubles, then doing the 4 and 5 stepsagain or mending
power steeringpump.
Use and Maintenace1 Check the new truck to driving for30004000km
,then fill oil to steeringand cleaning oil net.2 Always checking
the oil measureor oil quantity in the oil crock, if it hassomething
wrong that change it .3 Do not disassemble the steeringsystem for
another side .Pay atten
tion to the oil pump pipeline ,it cannot fill with air in it
.keep cleaning it.Step:a) Turn the steering out oil pump intothe
steering in oil pump.b) The return oil inlet connect with oilcan
inlet.4 In some troubles of power steering, the drive can use the
handsteering but could not use for a longtime.5 Don't steer when
parking, since itwill shorten useful life of parts.6 According to
the regulate to fillhydraulic pressure oil, the environment
temperature is above 0 ,change steering system shouldadopt L -HM
464# wear resistancehydraulic pressure oil; the environ
HFC1048series trucks
43
ment temperature on 0 . (the different number oil can't mix an
usage).The import power steering orsteering pump to choose to press
oilwith the DEXRONII model numberliquid.(American G.M.
standard)
The use and maintenance ofpower steering1)How to use of power
steeringa) Don't steer when parking for 5minutes.b) Forbid to steer
the steering wheelwhen can not moved.c) Forbid to steer the
steering wheelin the same place.d) Forbid to steer the steering
wheelspeed for 90turn/m.
2)How to maintenance of powersteering
The main idea is to prevent ,to checkfor scheduled time
.Following aboutthe ministry of communications standard about the
car JT T20195Thearts and crafts maintenance of carand city build
ministry standardCJl786 The technique conditionmending way of the
city bus.a)Daily maintenance: to checking thetruck when driving in
order to yoursecurity.b)One class maintenance(2000-3000kms)i. Each
lubrication partto fill thegrease, the power steering should befill
the oil on time.ii. Insure cross shaft , cross/lax pullrodten ball
end to moved vivid andnot loose.
iii. Check tight each conjunction part.iv. Check pipe
conjunction part, insured and don't leak oil .c)Second class
maintenance(10000-15000 kms)i. Chang the power steering oil.ii.
Clean and check the steeringwheel.iii. Clean the power steering oil
net.Iv Check front axle, ball axle, steering knuckle, steering
knuckle arm,steering knuckle frname.v. Disassemble, length pull
rod,cleaning and checking parts in orderto insure them well.vi.The
other parts, please read thereference. (JT T 20195 )d)To install
steering knuckle plumbing arm and locate blots. The daily
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44
maintenance:i. Insure the location. Find out steering knuckle
plumbing arm is fall, thenput them on.ii. If the steering knuckle
plumbingarm have some mistake, change thenew ones.iii. Tight the
steering gear and frame,frame and frame blot.iv. When turning the
direction, insurethe length pull rob and steeringknuckle plumbing
arm do not intervene for each other.
IXBraking systemBraking systems of trucks of this series are:
parking brake system(centerdrum) and running brake system
(airbrake, hydraulic brake)
1. Running brake system1.1 Air brake1) Brief description of this
system:Compared with hydraulic brake, airbrake can bring greater
brakingforce under the condition that forceon the pedal is not
great and thepedal stroke is not long; at the sametime,
dual-circuit air-pressure driving braking device is equipped
tofront and rear wheel separately, sothe braking is safe, reliable,
labor -saving, and more effective; even ifone of the brakes does
not work, thevehicle can still brake safely.2) Structure and theory
(referring tothe following diagram)Brake pipeline is arranged as
follows: compressed air produced by
air compressor 1 comes into themain air reservoir 3 (namely wet
airreservoir); and then the air is separated into two and come into
the frontchamber 9 of the auxiliary air reservoir and the rear
chamber 4 of themain air reservoir, the front chamber9 of the
auxiliary air reservoir and therear chamber 4 of the main
airreservoir. Compressed air in the frontchamber 9 of the auxiliary
air reservoir and the rear chamber 4 of themain air reservoir come
into upperand lower chambers of brake valve8, and then the air is
transportedseparately to rear brake chamber 12and front brake
chamber 2. Checkvalves 10 installed on ends of the airinlet pipes
of the front chamber 9 of
HFC1048series trucks
45
the auxiliary air reservoir and the rearchamber 4 of the main
air reservoir incase that compressed air in the airreservoir flows
backwards. There areinterfaces for air pressure gauge 7and pressure
-adjusting valve 6.When air pressure reaches 0.74 -0.84Mpa,
compressed air props upvalve of the pressure -adjustingvalve, and
comes into upper cover ofthe air compressor to make air inletvalve
open and the air compressoridles. When brake valve 8 is depressed,
front and rear brake chamber 2 and 12 operate at the sametime,
which makes front and rearbrakes operate. When the brake pedal is
released, compressed air infront and rear brake chambers go in
to the atmosphere by front and rearair-deflating valves 11 and
13.
1. air compressor 2. front brake chamber 3. front cavity on main
gas cylinder4. rear cavity on main gas cylinder 5. safety valve 6.
pressure control valve7. barometer 8. brake valve 9. additional gas
cylinder 10. one-way valve11. front quick-release valve 12. rear
brake valve 13. rear quick-release valve
Interface for air inletInterface for low pressure
Interface for clutch
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Brake assemblyThe function of brake is to utilizepower produced
by friction betweenbrake drum and brake shoe slice toabsorb kinetic
energy of vehicle todecelerate or stop the vehicle. Frontand rear
brakes of this brake systemadopt imbalanced structure and aremainly
composed of brake chamber,brake arm and brake
HFC1048series trucks
1. return spring locating pin 2. roller shaft-brake shoe3.
roller-brake shoe 4. gripping ring-brake shoe rollershaft 5/18.
front brake shoe with liner assembly6/19. front brake friction
plate 7. brake cam 8. front brake baseboard with liner assembly 9.
front brake dust cap
10. hex bolt 11. front brake air chamber support frame with
liner assembly 12. front left brake air chamber assembly13. hex
bolt 14. front brake adjusting arm assembly 15. shoe shaft fixed
bolt 16. front brake shoe-shoe shaft17. front and rear brake shoe
shaft-liner 18. return spring
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Adjusting arm1Lubrication: mount oil month onadjusting arm, use
lithium basegrease periodically to lubricate adjusting arm (maximum
lubrication interval is limited to 10000km), or else,life of
adjusting arm will decrease.2Check adjusting arm's counterclockwise
force moment periodically:rotate adjusting nut of adjusting
armcounterclockwise when running every20000km and measure whether
therotary moment is bigger than 18Nm,measure for three times
repeatedly. Ifthe moment is smaller than 18Nm, itindicates
adjusting arm has beendamage and needs to be replacedthe adjusting
arm assembly.
BrakeFront brake has the same structurewith the rear brake. It
is shoe brakewith camshaft with fixed sustainer.When braking, front
and rear shoeslices of the brake press to the rotating brake drum
by the action of thesame push force; so the rear brakeshoe is
called power-reducing brakeshoe. All above lead to imbalance
offorces that front and rear brakeshoes press on the brake drum,
sothis kind of brake is called simpleimbalanced brake.Clearance
between friction disc of thebrake shoe and the brake drum mustbe
proper, before adjusting the clearance, make the front wheel off
ground;adjusting steps are as follows:
Full adjustment1. Loosening fixed nut of brake shoebearing pin
and nut of binding bolton cam bracket.2. Rotate brake shoe bearing
pin soas to make clearance between frontshoe and bearing pin end
the sameas that between rear shoe and bearing pin.3. Start braking,
make brake shoefriction disc lean against brake drumclosely and
brake camshaft automatic positioned and tighten nut ofbinding bolt
on support frame.4. Release braking and rotate wormso as to make
brake shoe frictiondisc lean against brake drum closely.Then
counter -rotate worm, releasedby 3/4r, brake drum should be
rotate
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freely.5. Test drive after adjustment, checkworking condition of
brake, whetherthe brake drum get hot and whetherbraking distance is
proper. If not,readjust it
Parts checkingTo move the worm of brake arm toadjusting the
distance betweenbrake assembly and brake drum .The way to the worm
for clockwiseand move it again and again when itcan moved.Then move
the worm forcouter -clockwise to 1 23 4circle.At last the drake
drum work agility .The distance between brake frictionpiece and
brake drum is 0.25c0.4mmcamshaft is 0.45mm.
Brake valveBrake valve is to adjust and controlthe whole brake
system.Use and maintenance1)Take care of ita) Should check the tube
pressurebefore driving, be air pressure measure is 0.6 MPa square
can drive,while driving in normally is in the O.74 - 0.84
MPas,should park the carwhether leak air or not and whetherthe
compressor normal work or not.b)When driving the truck to
checkbrake system. If it has somethingwrong should be change it for
another one.c)The damage of the brake shoeplate is too big, then
changing another one. The piece should be the
same new ones and do not havedirty oil, shatter, chap.d)To
change the friction and installshoe plate and brake cam again
inorder to adjusting the friction pieceand the brake cam.2)Shedule
time maintenance:a) The first maintenance (1500-2000kms)i. To
excluding the oil from the gascylinder.ii. To fill with grease
where need it.iii. To checking and adjusting thetighten about air
compressor .b) The second maintenance(1000012000km)i. Disassemble
and adjust the brakeand adjust the distance betweenbrake shoe
friction piece.
HFC1048series trucks
ii Check the air compressor andclean the dust of air valve.iii.
Check the brake involucra whichneeds news to changing it.c) The
third maintenance (2400030000km)i. Check and adjust the brake valve
.When it need new one then change itii. Check the brake valve pipe
.When it need new one then change itiii. Clean all the pipe in
order to keepit liquidity.
1.2 Hydraulic brake system
1) General StructureThe running brake system is hydraulic. It is
composed of vacuum
booster, vacuum cylinder, mastercylinder, control mechanism,
braketube, front brake and rear brake. It issensitive and reliable,
and it is simple to manipulate. See the last figure.If you feel
braking power is not sufficient when brake pedal is
depressedcompletely and oil level is normal,there may be air in
brake system.Bleed system in follow sequence.Firstly, bleed RR
brake; secondly,bleed LR brake; thirdly, bleed RFbrake; then bleed
LF brake. Followthese steps:a. Clean air -drain screw of
maincylinder and wheel cylinder;b. Remove oil -drain plug of
maincylinder or reservoir and fill it withbrake fluid until fluid
level reach the
1Control mechanism2Vacuum booster3Master Cylinder
4Reservoir5Vacuum cylinder 6Brake tube7Front & Rear brake
the picture of running brake
connect to enginevacuum pump
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edge.c. Depress the brake pedal severaltimes before hold it
depressed andrelease the air-drain screw to bleed.Repeat doing this
until air in tube bebled completely. Keep a little oil left,or air
can reenter the system.d. Fill reservoir with brake fluid.
2) Note When Use Brake Fluid The specified brake fluid of
thisseries truck is synthetic brake fluid ofclass JG3 (GB10830).
Never use mixed brake fluid. Synthetic brake fluid is good
atsopping up. They should be storagein a clean sealed dry
container, keepaway from water, organic solvent,petroleum, and
dust. Otherwise thevehicle's capability of brake wouldbe cut down
seriously. Clean system with alcohol beforereplacing brake fluid
with differentbrand. Follow these if alcohol is unavailable.a.
After drain all old brake fluid, fillreservoir with new fluid near
to theopening and bleed system again, in
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HFC1048series trucks
schematic diagram hydrostaticbrake system
1. Brake pedal 2.Vacuum boosterand main cylinder assembly
3.Reservoir 4. Connection hose5.Rear brake 6.Vacuum
cylinder7.Intake manifold 8.Front brake9. Vacuum check
valve10.Connect to vacuum-alarmhydraulic tube vacuum tube
order to sweep old fluid away.b. Fill system with brake fluid.
Brake pedal's free play should be5 ~8mm after adjusted, or it
willcause main booster work abnormallyand make brake drum over
hot.
Running brake1) General StructureThe running brake is hydraulic
drum,both front and rear is two leadingshoe brake. It is composed
of bottomplate, wheel cylinder, brake shoe setwith pad, and return
spring set.2) Adjustment of Running BrakeThe clearance between pad
anddrum will be bigger and bigger dueto wear. In order to ensure
brakework well, adjust it regularly followthese steps.
Jack up the wheel which you want toadjust and remove the seal
plug. Dialthe adjusting gear of wheel cylinderpiston accord the
arrow near the adjusting hole on bottom plate withspecial adjusting
screw and at thesame time rotate the brake drum untilthe drum can
not rotated by hands.Then rotate the adjusting gear backfor 5 ~9
teeth, keep the pad 0.2 ~0.45mm away from the drum, so thatthe drum
can rotate freely again.3) Use & CheckReplace the pad which is
worn out ordamaged. Before installed, the newpad should be ground.
Make surethat the new pad has not oil coat, also has not crack and
chap and otherflaw.
The clearance should be adjusted inevery time of maintenance.
Checkdrums with hands for temperature every time you park, adjust
the clearance if the temperature is too high.Check wheel cylinders
for leak, andreplace the leather gasket if leak isdetected. Protect
drums from beingwrong result from over heat and other reason.
Vacuum booster1) General StructureBooster of this series of
truck is dualdiaphragm vacuum booster, which iscomposed of return
spring, controlvalve, rubber diaphragm, noise elimination board,
and so on.2) AdjustmentBooster have been adjusted in fac
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tory, don't disassemble it and protectthe diaphragm from been
damaged.
1.3 Parking brake system
parking brake systemcontrol mechanism
The parking brake system includescontrol lever, pull wire, and
parkingbrake, as the last figure. Parkingbrake, which is mounted
next totransmission, is center drum brake. Itcan act on drive shaft
when vehicle
is parking. Also it can operate withrunning brake together in
emer -gence.2) AdjustmentNormally, the clearance betweenparking
brake drum and brake padis 0.65mm, and it is homogeneous inupper
and lower parts. The padshould be replaced often. Followthese
steps.a. Jacking up rear axle until onewheel deviate from ground.b.
Release the brake handle com -pletely, shift gears to neutral
position.c. Rotate brake drum until the holegets its lowest
position. Insert ascrewdriver through this hole to stirthe
adjusting nut upward until brakedrum braked completely
Then return the adjusting nut for 2~6teeth. See the right
figure.
adjustment of the clearance betweenbrake pad and drum
Use & Check:Check and adjust the clearancebetween brake pad
and drum.
1Control lever 2Pull wire3Frame 4Parking brake
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HFC1048series trucks
Wheel & Spare wheelriserGeneral structureEvery truck
hasseven wheels, one of which is sparetyre.Use & Check:In order
to use for a longer time,please charge tire according tospecified
pressure value. Never drivewhen pressure is insufficient. It
isnormal that pressure increasesduring travel, and don't try to
reduceit by deflating. Check the tirepressure when tire is not hot.
If thetwo center patterns on tire treadtouch against ground under
fullyloaded, the pressure is normal.Clean the rust and other dirty
on rim
before installed. It should be talcedon the surface between
inner tubeand outer tire. Wheel nuts should betightened for two
steps. Tighten all ofthem first before tighten them withspecified
torque according to diag-onal sequence.
In order to make tires wore uniformly,exchange wheels each other
accor-ding to the figure.
2. Spare wheel riser1) General Structure & UseThe spare
wheel riser is driven bycatenary suspension internal gearedwheel,
see the next figure. It ismounted underneath the frame. Tooperate
it, fix it on the frame andtighten it with hand before rock backfor
15 degree.2) Maintenance of RiserCheck riser for loose every
timebefore drive. Check chain and carrierspring for crack and
replace ifnecessary. In order to prevent it fromrust, grease the
gearing regularly, sothat it can be easy to operate.The third
maintenance, should beprepare wheel.Then cleaning,check-ing
,install it again.
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1Frame 2Spare wheel riser assembly 3Eccentric wheel4Spare wheel
5Chain 6Carrier
spare wheel riser set
54
HFC1048series trucks
55
IVElectrical equipment() Starter
() Generator and adjuster
() Illumination equipments() Battery
() Sensor
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57
Use the measuring cell to testing.Put the car and the measuring
cell
for a line, from measuring cell screento testing left, right,
the far and nearlight beam to project light upon directions to be
partial to move a valuerespectively.To adjusting the headlight' the
uprightess and the level. To adjustingthe passing beam , make it
match diagram the shining area center re
quest a left and right light to left andright (the V is left-the
V is left, the Vis right-the V is right for the middlepoint) be
partial to move a value tobe no bigger than a 100 mms.
2. Small lightTwo small lights are embedded onthe two
symmetrical corner of frontpanel. They should be turned on
Right ScreenLeft
Left Right
10 m
headlamp(old series)
()StarterNote:1) Starter should be connected withbattery
correctly.2) Every time start, don't keep starterwork continuously
for more than 15sand stop for 1-2 seconds in the interval, since
over hot may damage it.Rest it before try start once again.3) After
several continuative failures,check starter, solenoid switch,
battery, wires, and also oil supply system. Retry after trouble is
shot.
()Generator and adjusterNote:
1) Generator should be connectedwith adjuster correctly, and the
polarities of generator and adjuster
should be matched properly.2) Never check generator by
short-circuit fire wire and magnetic field.3The diode and
insulation of generator can be inspected with multimeter and
ohmmeter. Don't usemegohmmeter to inspect, also ACpower whose
voltage exceeds 200v.
() Illuminate equipments1. HeadlampThis series of truck have two
headlamps which are embedded in frontof cab symmetrically. The
headlampwhich is called double filament bulbhas two different
pieces of filamentand can shine two different kinds ofray, the
brighter one is used as highlamp while the dimmer one is usedas low
lamp. Running in night, turn
on the high lamp to lighten the road,but switch to low lamp when
two vehicles pass each other.In order to see the road clearly ,when
you stripping and re-assemblyheadlight that you sould be
adjustement the position . The way is to putthe car on a evenly
road then put ascreen in front of the car. The distance between the
car and thescreen is about 10meters.(as picture)
56
headlamp(new series)
HFC1048series trucks
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59
pacitance into battery. Cut down thecharging current for half
after singlecell's voltage reaches 2.4V. Aftercharging battery for
3~5 hours, if thespecific gravity of electrolyte don'trise any
more, keep on charging for2~3 more hours. Table 2 shows
therelationship between temperatureand the corrected specific
gravityvalue of electrolyte.6)Protect the joint of terminal postand
wire from dirt and loose, or theterminal post will be burnt.
Applyinga Vaseline coat on the terminal postafter tighten the joint
which can protect joint from rust and loose contact,so that engine
can be started easily.7)If left unused for a long time, battery
should be removed and pre
served in a place where is dry,shady, cool, and ventilative And
dothe additional charging every month.
()Sensor1. Fuel level gauge sensorThe fuel level sensor is
sliding resister. Floating on the fuel level, thefloat rises and
drops with the level'schange. This change causes the resister
connected in circuit and shorted, and make the electromagnetic fuel
level gauge changes. Connectingthe fuel level alarm lamp's
terminalwith the indicator light can shows thelowest fuel
level.
2. Water temp sensorThe temp sensor is a thermistorwhich is
mounted in water jacket todetect the temp of cooling water. It
isconnected with the water tempgauge on instrument board. The
wa
Loca
Specific gravity offully charged battery under 15
Where temp above -30 in winter 1.290 1260Where temp above -20 in
winter 1280 1250Where temp above -10 in winter 1270 1240Where temp
below 0 in winter 1270 1240
Winter SummerWhere temp below -40 in winter 1310 1270
Table 1 Specific gravity of electrolyte
Measured tempof electrolyte
+45+30+15 0 -15-30-45
Corrected valueon hydrometer
+0.02 +0.01 0 -0.01 -0.02 -0.03 -0.04
Table 2 Corrected specific gravityvalue of electrolyte under
15
when vehicle park in dark or fog, also when run in day to show
the position and the width of the vehicle.
3. Fog lampFog lamp can light further in fog thanother lamp.
They should be turnedon when vehicle run or park in fog orin dark,
so that vehicle can be seenclearly. Fog lamp is combined
withheadlamp.
4. Ceiling lampThe ceiling lamp is installed on theceiling, and
it is combined with inside rear mirror together. It can lighten the
cab, and also it can observethe condition behind.
()Battery1. General
The battery of this series is aneroid,and it is sealed by a
plastic case.This kind of battery has a big capacity and a light
weight.
2. Use & Note1) Keep the case clean, and protectbattery from
leak.
2) Make sure that the hole on theupper cap not choked, or the
platewill be damaged by the vapor produced own to
electrolyzing.3)The electrolyte level should be 10~15mm higher than
plate. Only distilled water can be filled into battery.
Never fill battery with fountain or riverwater, for them will do
harm to it.4)Check the electrolyte for specificgravity and level.
Do it every 10~15days in winter, while do it every 5~10days in
summer. Specific gravity ismeasured with gravimeter. Table 1shows
normal specific gravity ofelectrolyte.5)The battery should always
beingcharged. Check battery for electricalvoltage if engine is hard
to be started. Additional charging if it is detected that specific
gravity of electrolytelower than 1.18 ~1.20, or batteryplates will
be vulcanized and it willdo harm to the plates. Additionalcharging
should be held for 13 ~16hours, and it can breathe 1/10 of ca
58
HFC1048series trucks
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61
Vehicle service and maintenance() Notice during running-in
period
() Daily maintenance
() Second-class maintenance
() Seasonal maintenance
ter temp sensor has a negative temperature coefficient and its
resistancedecreases with the increase of watertemperature. Don't
replace the sensor with a positive temperature coefficient one, or
the water temp gaugecan not work correctly.
3. Oil pressure alarmOil pressure alarm is a normal
closedswitch. It will be opened when oilpressure reaches and over
the lowest pressure, so that circuit is disconnected and indicator
goes out.
60
HFC1048series trucks
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63
well. Don't drive in high speed whenthe temp is below the normal
temp(between 80oC and 90oC).5) Regularly check the engine cylin-der
cover, wheel nuts, car body, andthe U-bolt of leaf spring for
tighten.Check the steering system, brakesystem, and clutch for
normal oper-ation. Check steering wheel for freeplay. Check the
brake pedal andclutch pedal for operating stroke andfree play.Note:
Cylinder cover bolts should betightened twice when the cylinder
iscool,according to diagonal sequencefrom the center to sides.6)
The oil should be replaced after500km1000km 2500km (do it
whenengine is hot), then it will be repl -
aced again in second -class main -tenance.
3. After running-in period1) Replace engine oil and oil
filtercore. Replace oil in transmissioncase and rear axle, and
replacelubrication in steering gear, also hubbearing grease.2)
Check all external bolts and nutswith specified torque.3) Apply
grease on all points whereshould be lubricated.4) Do items of first
-class mainten -ance.
Daily maintenameWhen you find out some mistakesabout the trucks,
you must checkand resolve it at the first time. It isvery important
to do periodical
service for the truck. As a result ofthe area and periodical
service aredifferent, so you should be take careof the truck to
periodical service.The following references is how totake good care
of the chassis. Doesnot introduce about the seasonservice.User can
follow the basisabout area to do season service.Everyday routine
maintenanceEveryday you do not use the truck ,you may check about
it, in order tohaving a good technology.1.To checking the engine
and fill withrust prevention and antifreeze oolant.In winter,let
out water from theengine.If you want to using antifreezecoolant
that you must follow the airtemperature.
I Notice during running -in periodTo improve vehicle's
reliability andeconomical efficiency and also to useit longer,
follow these during running-in period which is specified as
about2500km.1. Before running-in period1) Wa sh vehicle with water,
andcheck all bolts and nuts for tighten.2) Check the radiator for
enoughwater,and check the engine,transmi-ssion, rear axle, and
steering gearbox for enough lubrication,also checkbattery and
reservoir for liquid level.3check brake systemdrive system,and
steering system for correctoperation.4) Check electrical equipments
and
lamp instruments for correctoperation, and check brake systemfor
normal air pressure.5) Check the shift gears for right; thecontrol
parts for normality, transm -ission for shifting smoothly, and
theindicator should works correctly.6) Check tires for proper air
pres -sure.7) Check that if driver tools andaccessories are
taken.
2. During the running-in period1) The new truck should run
onsmooth road, and don't make it loadmore than 50% of its rated
loadbefore it traveled 800km and don'tload more than 75% before
1500km,or it will shorten truck's life and bringdriver danger.
1)Put so many goods in the trucks ,itwill be curtail the car's
life and alsoinfluence your safety.2) Don't run faster than the
followspeed.First gear 7km/hSecond gear 14km/hThird gear
26km/hForth gear 40km/hFifth gear 56km/h3) At the beginning, check
the rearaxle, transmission case, driveshaft,and brake drum for
temperature.Give ear to the sound of chassiswhen driving and stop
to inspect ifabnormal noise is heard, then shoottrouble before
drive again.4) Both the cooling water temp andoil pressure should
be noticed very
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HFC1048series trucks
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64
2.To checking the measure lubricantoil of the engine.3.To
checking the degree of tensionand measure of injury about the
fanbelt.4.To checking brake system when itwas working or sealing
the atmosph-eric pressure (hydraulic pressure)and pipe line.5.To
checking the work aboutdirection system circumstance,whether each
bolt and the nut hasn'tloosen to move.The cotter pin is
verytight.6.To checking weather the springabout armor plate7.To
checking the atmospheric pres-sure of wheel.To finding where
isharmful position about the wheel and
nut.8.Notice to fill water to the airreservoir everyday.
( )Second-class mainte-nanceWhen the ne w car was driving forone
period which should take dailycare and scheduled care.In order
tounderstanding the basis usage andthe technology.The car drive on
acommon road,the second mainten -ance mileage is 15000
kilometers.The car is going to do the secondmaintenance,you can
come to JACSpecial Repair Shop and we will tryour best to help
you.
Seasonal maintenanceIn order to keep some parts meet
therequirements of climate on aspects
of technique and work request, doseasonal maintenance.At the
beginning of summer:1. Cleanout water scale in the coolantsystem.2.
Replace lubrication for summer.3. Fueling with #0 diesel oil
specifiedin GB252.4. Clean up the battery and adjustthe specific
gravity of electrolyte.At the beginning of winter:1. Clean up the
batte