Manual

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 1

PrefaceThe P&N family of microbuses is the new series of vehicles developed and made by SAIC-GM-WulingAutomobile Co., Ltd., featuring state-of-the-art technologies, stable performance and economy driving.This Manual is specially prepared to facilitate your servicing and maintenance on Wuling P&N seriesvehicles.The information contained in this Manual is based on the latest products and technologies when it is printed.The configuration of the vehicle you purchase may vary from this Manual to reflect our continuousimprovement in product engineering without prior notice.

Please pay special attention to such changes to your Wuling vehicle.If you have anything not clear enough, please refer to the latest version of the Service Manual, and you may contact our Technical Center directly.

Mechanics may refer to this Manual to service the Wuling vehicle.This Manual may contain errors or improperness. Your comments are highly welcome.SAIC-GM-Wuling Automobile Co., Ltd.:

May 2006

Table of Contents

Chapter 1 Basic InformationChapter 2 Heating, Ventilation and A/C SystemChapter 3 Steering SystemChapter 4 Suspension, wheel and tireChapter 5 Transmission SystemChapter 6 Brake SystemChapter 7 EngineChapter 8 Operation SystemChapter 9 BodyChapter 10 Protection UnitsChapter 11 Electrical System

Chapter 1 Basic Information

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 2

1.1 General information 1.1.1 Diagnosis form1.1.2 VIN 1.1.3 Nameplate

1.2 Fuel, brake fluid, lubricating oil, fluid sealant, coolant fluid

1.3 Tire pressure

1.4 Vehicle maintenance and servicing1.4.1 Before inspection 1.4.2 Electrical service 1.4.3 Intermittent fault 1.4.4 Preparations before the disassembly

1.4.4.1 Lift the vehicles 1.4.4.2 Rear axle disassembly1.4.4.3 Engine disassembly1.4.4.4 Assemble

1.5 Regular check, service and maintenance 1.5.1 Regular check, service and maintenances

Chapter 1 Basic Information

1.1 General information1.1.1 Diagnosis form

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 3

Diagnosis Form records the vehicle services; Customers shall properly fill this Form, which will be used by the ServiceStation to analyze the possible causes to your vehicle’s fault.

Checklist (Sample)

Customer: Vehicle Model:VIN: Mileage:Purchase Date: Registration Date:ProblemsDifficult Startup Cannot start Cannot ignition No spark

Poor driving performance

Surging when accelerated

Backfire/ exhaust pipe knockNot enough power

Surge Abnormal noises Unstable idle speed Unstable high idle speed (r/min to r/min)

Abnormal idle speed High idle speed Low idle speed Others

Engine stop in oneCondition

After starting When treading accelerator pedal

When releasingaccelerator

When start one system Electrical appliance △P/SOthers

Clutch not disengaged completely

Walking out of meshing Gear not engaged Abnormal noises fromgear shifting

Abnormal noises ofpropeller shaft

Abnormal noises ofrear axle

Steering loose Front wheel vibrating

Tire uneven wear Driving deflection Brake delay Brake deflectionBrake pedal loose Brake fluid leaking Battery charging fault Abnormal lightAbnormal horn Starter motor does not

workRadio and cassetteplayer not working

Instruments workingabnormally

Air conditioner malfunction

Air conditioner leakingwater

Door lock fault Seats bad

Window regulator fault Weather performance Temperature Frequency

Road conditions Sunny /Cloudy /Rainy Hot/Warm/Cool/Cold Any condition

At any time □Sometimes (times/day, month)

City area □Out of city Expressway Mountain areas(□upslope □Down slope)

Engine temperature □Cold□Preheating

□Heating□In any condition

□Starting moment□After starting

No –load running □Engine speed ( r/min.)

Vehicle □Running □Constant speed

□When accelerating□Decelerating moment

□Turning right moment□Turning left moment

□Shifting moment Gear□Parking moment

□Driving speed when problem arises ( km/h)

Fault Indicator □On all the time□Light sometimes

Not lighting all the time Troubleshootingcode

First check: □No code □Normal code □Fault code ( )

Second check:□No code □Normal code □Fault code ( )

Note: The above form is for reference only, which may be revised as necessary.1.1.2 VIN

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 4

VIN is stamped on the frame under the right seat ofdriving cab.One vehicle identification plate is riveted on the upperleft of dashboard. VIN is indicated on it.

1.1.3 NameplateNameplate is riveted on the center-pillar on the right of driving cab.The information contained in the nameplatevaries with different vehicle.

1.2 Fuel, brake fluid, lubricating oil, fluid sealant, coolant fluid.item Recommended spec. Volume lt. obsGasoline Lead free gas, above 90# 40 l truck

Engine Oil 15W40 (-15/40°C) 3 (3.5 oil filter repl.)

Gearbox Oil GL-4 (75W90 80W90 85W90) 1.0 4th 1.3 5th gear

Rear Axle Oil GL-5 (75W90 80W90 85W90) 0.9

Liquid coolant Chongqing Yiping 4916 4.5

Brake Fluid TEEC JG3 automobile brake fluidAbove DOT3 degree

0.5

Brake cylinder grease Chongqing Yiping 7503

Chassis Grease Chongqing Yiping 7022, #2Q/SHYPO2.017Z-2000

Servicing Materials 1.Anaerobic adhesive GY3402.Baide Adhesive3.Glue 12014.HZ-1 RTv sealant, oil and grease resistant5. 1406S screw fastening adhesive6. Lithium based grease ZL-2

Caution: 1. Do not mix two kinds of brake fluid.2. The coolant should be corrosion prevention, rust proof and frozen proof. 3. The water used to make up coolant must be soft water.4. Ambient temperature (Lowest) -10°C -20°C -30°C -45°C v/s Coolant thickness 30 40 50 60

1.3 Tire pressure (cold conditions) KPaTires Idle Full load DateFront R12 200 200

Rear 200 300

Caution: After the tire being inflated, take the 4 mounting bolts as fixture center to test the balance on a dynamic balancer. The unbalance should not exceed 10g. Otherwise, attach adequate counter balance onto the wheel rims.

1.4 Vehicle maintenance and servicing

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 5

1.4.1 Before inspection Protect components concerned, since

some parts may be damaged or stained during the inspection and servicing.

Take adequate measures for protection.

Properly arrange the parts as per the disassembly sequence.

Reasonably identify the parts to be changed and to be reused.

Protect parts from damaging.

Obs.

The parts below have to be changed after they are removed.

Oil seal Liner Gasket O-ring Locking washer Splint pin Self-locking nut Guard belt and retaining ring

You should only use the genuine Wu Ling parts

Vehicle washingWhen using a high pressure washing gun to wash your vehicle, always maintain the nozzle 300 mm away from the plastic parts or the openings (such as doors, truck and roof opening).

Obs.

Identify areas to pressure washing

Hose and other rubber parts To avoid any possible damages to the

hoses and other rubber parts, be sure not to stain them by gasoline, greaseand other fluids.

Keep the hose and rubber parts clear form any other parts during the disassembly and reassembly of hose and hose clamp, to avoid damages to them.

Obs.

Clean them with soap

GreaseIt is highly recommended to only use the specified grease during the assembly.

Brake fluidNever spill off the brake fluid or it will damage the finish coating of your vehicle. If there is any spill, you should wash the stained part immediately using clean water.

1.4.2 Electrical service

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 6

You should disconnect the negative terminal from the battery before checking the circuit.

Caution: Be sure to disconnect the ignition switch and light switch before connecting or removing the negative cable (Or damages may results).

Use adequate clamps to tighten the harness to avoid any looseness

The harness connected onto such vibrating parts as the engine should be so tightened that the normal vibration of the vibrating parts will not be restrained by the harness connected

When using cable clamps to fix them, you should verify that an adequate looseness has been remained

If there is a fixing sign indicated on the harness (color strip), at which point you should fix the harness properly

If a harness has to contact with any sharp part be sure to protect the harness using ethylene tape to avoid any possible damage

Never allow any wiring or harness be pressed under any parts

Only use the specified fuse to change the fuse blown. If bigger fused being used, some parts may be blown even accidents such as fire may results

Be especially careful with the sensor, relay and other electronic parts, they are extremely vulnerable; do not drop them

When using a multi-meter to check the circuit conductivity or the circuit voltage at the connection, only insert the probe from the harness end

If you need to check a sealed connector, insert the probe from the

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 7

hole on the cover until touch the connector inside. Be sure not to damage the insulation

Disconnect an adapter by pulling both adapter ends. Do not disconnect an adapter by pulling the cable connected

Press the locking device as per the direction shown below to disconnect an adapter if a locking device is attached.

When you connect the adapter attached with a locking device, plug in the connection until a click sound is heard.

1.4.3 Intermittent fault

The intermittent fault is mostly resulted from the wireconnections or wires itself, sometimes it caused by thefaults of the lockup relay or the magnetic coil. Alwayscheck the circuit thoroughly if your suspect there is anyfault with the circuit. Check the mating connectors The stained contact pin and socket mayinfluence the connection. Contact pin or socket is in poor shape or isdamaged. The adapter is damaged or has a poor contactdue to the effect of water, oil, grease or anyother dirties. Check the contact between plugs (Or connectors)and wires.Check every connector of malfunction circuits for poorcontact by shaking wires slightly. Repair them ifnecessary. Check wiresWires should be completely insulated. If any nakedsection of a wire contacts with the vehicle body or anyother conductors, it will lead to short circuit.Ensure all wires are in good conditions and may functionproperly.If a wire consists of several cords, make sure to check itsresistance. If abnormal, repair or replace them asnecessary.Chapter 1 Bascic Information7

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 8

1.4.4 Preparations before the disassembly1.4.4.1 Lift the vehicles Lift or jack up your vehicle to a certain height and the hoisting or supporting point should be reliable with thetotal weight uniformly distributed. The vehicle height should be suitable and convenient for disassembly. When jacking up your vehicle with a lifting jack, you are advised to follow the instructions provided, to avoidany possible damage to the vehicle body. Using the lifting jack: Using a support:Chapter 1 Bascic Information8

Using a hoist:Chapter 1 Bascic Information91.4.4.2 Rear axle disassembly Properly jack up the vehicle to remove the wheels. Use a suitable support to jack the rear axle up. Remove the parking brake cable, drain the brake fluid and remove the brake hose. Loosen the U bolt andremove the leaf springs on the two sides. Remove the lower connector of the rear shock absorber. Lower the support to separate the rear axle from the vehicle body. When you disassemble some elements from the rear axle or other assemblies, you can lift or jack your vehicleas necessary.1.4.4.3 Engine disassembly Disassemble the connecting pipes, harness plug, earth cable, odometer flexible axle, cooling water pipe andvarious cables (clutch, accelerator and choke cable). Remove the locking rod (flexible shaft) of gear shift manipulation and the tie rod of shift lever (flexible shaft). Remove the flange bolt connecting the rear axle and the propeller shaft, and then draw out the propeller shaft.(Use a clean stopper to block the output end of gearbox, preventing the lubricating oil from flowing out.) Remove the intake hose and the exhaust pipe. Use a suitable bracket to support your engine. Remove the hoisting bolt of gearbox (at the point where the gearbox is connected with frame). Remove the bolts connecting the engine suspension and the R&L beam, then lower the bracket to remove theengine from the vehicle. When standing in a trench to install the engine, make sure to hold the engine firmly to avoid any possibleinjuries1.4.4.4 AssembleLift or jack up the vehicle to a certain height. Please refer to the information concerning the disassembly for reassembly.Caution: During the re-assembling, the unchanged parts should be all cleaned. Fitting parts should be cleaned with

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 9

gasoline. Lubricate all parts as appropriate. During the re-assembling, tighten all fasteners to the torque specified. The torque value is indicated on theassembly drawing.1.5 Regular check, service and maintenanceRegular check, service and maintenances refer to the check, service and maintenances you should perform at a regularinterval of time or driving mileage. To maintain a proper functioning of your vehicle and to ensure the passengers’safety, it is highly recommended that you should perform the regular maintenance as per the scheduleChapter 1 Bascic Information101.5.1 Regular check, service and maintenancesPlease refer to the Form below:Regular check, service and maintenance:Break-in 3 6 12 18 24Interval(months)Interval (km)Item 2000 5000 10000 20000 30000 40000Fan belt: check the tightness or damage J. T J. T J. T. G GTiming belt: check tightness or damage J. T. GBolts of cylinder cover, in.& ex. pipe and enginesuspension: check tightnessN NOil-filter: replace G Every 5000km GOil: change G Every 5000km GFuel-filter: replace GFilter element of air cleaner: clean and change Q Q GLiquid coolant: replenish and change J. B J. B GHoseand connectorsofthe cooling system: check theleakage and damage J. T J. T. GFuel pipe and connections: Check the leakage ordamage J. T J. T. GCrankcase ventilation hose and connector: checkor change J. T J. T. GPCV valve: check and change J. Q J. Q. GHV damper wire: deteriorate or damage J. T. GSparkplug: clean and regulate gap J. T Q. T. GIgnition timing: check and regulate J. T J. TIn. & ex. valve: gap adjustment J. T J. TIdle speed and emission: check and regulate J. T J. TFuel injector: clean QDischarge deposits in the fuel tank QCooling jacket, radiator, water pump, andthermostat: check and clean J. QFuel vapor storage vessel: piping and connectors:check J. T. GFuel vapor canisterChang it one time every 50000km. In the bad conditions, it should befrequently checked. If the liquid fuel is found, it should be changedimmediately.EngineEFI system Refer to the indication of trouble light.OperationAccelerator, clutch, gearbox, gearbox controlcable, axle: check, adjust, lubricate and change J. T. GAdjust the clutch pedal free travel (15~25mm) J. T Every 5000kmJ.t (May shorten or lengthen as necessary.)Gearbox lubricating oil G J.B G

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 10

Propeller shaft: check J J. GSpeed reducer lubricating oil G J. B GTransmissionConnecting bolt: fasten as necessary N N※Under hostile conditions, such as in the dusty area, replace all parts at a shorter interval or clean all parts morefrequently.Chapter 1 Bascic Information11Interval (months ) Break-in 3 6 12 18 24Interval (kms)Item 2000 5000 10000 20000 30000 40000Wheel nut: tightness(As per the specified torque)J. N NFront wheel hub bearing pre-tightening: check:lubricateJ. T J. T Q. TToe-in adjustment J. T J. TWheelTire rotation TRubber cushion for the connections of steeringaxle and steering gear, ball joint of tie rod and linkrod, the wear or rubber aging of steering swingarm, engaging clearance of steering rack andpinion: Check, adjust and replaceJ. T. GSteeringConnecting bolt: fastening N NCheck the braking pipe; check, adjust andlubricate the parking brake and brake pedal(including the vacuum booster); check and adjustthe free travel of brake pedalJ. T J. T. GCheck the brake fluid: replenish or change ifnecessary J. B J. B GMater cylinder and wheel cylinder rubber cup:changeGCheck the friction disc for the disc or drum brake J. T. GBrakingConnecting bolt: fastening N NCheck the performance of front and rear shockabsorber JCheck lower arm bush and ball pin; check strutbar bushing; check the leaf spring hanger innerboard, U bolts and rubber lining; check the rubbercushion assembly; check the wear of rubbercushion, front suspension, flat bearing and dustguard; check the breakage and aging of rubberelements.J J. GCheck and lubricate the leaf springs; check thecoil spring.J. RSuspensionConnecting bolt: fastening N NFrameFrame and cab: calibrate and weld J. T. HCheck the specific gravity of electrolyte ofbattery; replenish with distilled water, if

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 11

necessary.J. B J. BCheck and charge battery: grease the pillar asnecessaryCheck the air piping.JCheck, adjust and maintain the performance ofengine, regulator and the starter motor. J. T. RCheck the cable connectors. JElectricalCheck the lighting equipment: check all signallamps; check the indicator, instrument cluster andswitchJ. GRefrigerant Replenish at any timeRefrigeration system J. TCompressor J. T. R.GCondenser Check and wash at any timeAir conditioner evaporator J. TLiquid drier GA/CTighten the refrigeration pipes N NNote: “J”= Check; “J.T.”= Check or adjust, change if necessary; “J.B”= Check and replenish liquid level; "N”=

Tighten specified torque; “R”= Lubricate; “G”=Change; “Q"= Clean; “H”= Weld.

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 12

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 13

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 14

Chapter 3 Steering System

Content

3.1 Check and Adjustment of Steering System

3.1.1 Check of free travel Check of Steering Whee3.1.2 Check of Steering Column Axial Clearance3.1.3 Check of Steering Angle3.1.4 Check of Rubber parts and joints

3.2 Steering System Assembly Drawing

3.2.1 Safety Regulations

3.3 Steering Wheel

3.3.1 Specification3.3.2 Steering Wheel Assembly Drawing3.3.3 Maintenance Guide

3.4 Steering Column

3.4.1 Specification3.4.2 Steering Column and Drive Shaft Assembly Drawing3.4.3 Maintenance Guide

3.5 Steering Gear

3.5.1 Specification

PICKUP WULING

MAINTENANCE MANUAL

P a g e | 15

3.5.2 Steering Gear Assembly Drawing3.5.3 Maintenance Guide

3.6 Steering Tie Rod

3.6.1 Steering Tie Rod Assembly Drawing3.6.2 Maintenance Guide

3.7 Troubleshooting

3.7.1 Steering System Measurement3.7.2 Abnormal Noise of Steering Gear3.7.3 Too Large free travel of Steering or Steering Looseness3.7.4 Return Difficulty of Steering Wheel3.7.5 Steering Swing or Unsteadiness3.7.6 Special Tools