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844Wheel Dozer
Blade Capacities 15.9 to 30.7 m3 20.7 to 40.2
Operating Weight 69 227 kg 152,619
Cat 3412E HEUI Engine
Gross Power 503 kW 675
Flywheel Power 466 kW 625
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844 Wheel DozerStrong power train combined with a heavy-duty front frame provides long life and
economical operation.
EngineThe Caterpillar 3412E Hydraulic
Electronic Unit Injection (HEUI) engine
delivers power and efficiency in the
most demanding applications. Engine
performance and decreased fuelconsumption are achieved through the
HEUI fuel system. pg. 4
Power Train
The Caterpillar planetary power shift
transmission and Impeller Clutch
Torque Converter with lockup clutch
provide smooth, consistent shifting with
rimpull control and direct driveefficiency. pg. 4-5
Structures
The 844 features a box-section rear
frame and four-plate front frame
providing strength and stability.
Together they provide resistance to
dozing shocks and stresses whileabsorbing shock loads and twisting
forces. pg. 6
Engineered for demanding work in largedozing applications. The 844 Wheel Dozerjoins the Caterpillar wheel dozer line-up
as an ideal match for power generating
utilities, smaller scale mines and thegeneral contracting industry.
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Blades and Blade Control
Choose between 21 and 40 yd3 sem
heavy-duty semi-U and coal blades
Replaceable bolt-on cutting edges a
bottom wear plates help extend blad
life. A single lever is used tohydraulically control all blade
operations. pg. 10-11
Hydraulics
Two, independent hydraulic systems
and load-sensing steering are the
invisible force behind the mobility and
versatility of the 844.
pg. 7
Operator Station
Experience a high level of efficiency
and comfort with one-hand operation
provided by the STIC controller and a
state-of-the-art cab. Operator
productivity is also increased withimproved range of viewing, reduced
sound levels, improved ventilation and
easy entry and exit.
pg. 8-9
ServiceabilityLarge engine doors, rear access stai
and convenient service platform wi
large doors enhance the serviceabil
of the 844. pg. 12
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Power Train844 power train components deliver dependable, reliable performance customers expect
from Cat wheel dozers.
The Caterpillar 3412E HydraulicElectronic Unit Injection engine is ratedat 466 kW Net (625 hp) at 2000 rpm.
HEUI fuel system and Electronic
Control Module (ECM) deliver power
and efficiency in the most demanding
applications. Electronic control
provides many benefits:
Automatic altitude deration
Elevated low idle
Cold weather starting mode
Acceleration delay on startup to
reduce engine wear
Advanced diagnostic capabilities
Automatic control of ether aid
Complete control of injection timingwithout concern for cam profile
limitations. Complete control of
engine speed provides advantages in
lower emissions, quieter operation,
reduced smoke, improved hot or cold
starting, white smoke cleanup and
high altitude operation.
Complete control of injectionduration. The HEUI system willdecrease proportionately with engine
speed but can also electronically
control the oil supply pressure. This
provides improved engine
performance and decreased fuel
consumption.
Injection rate shaping reduces nitrousoxide (NOx) emissions and reduces
engine combustion noise.
1 Aftercooler lowers inlet chargetemperature. Reduces thermal stresses
that can cause premature wear of
pistons, rings and liners.
2 High injection pressures,
independent of engine speed,decrease smoke and emissions while
improving response.
3 Oil-cooled pistons and full-length,water-cooled cylinder liners providemaximum heat transfer for longer
component life.
4 Engine oil cooler maintains optimumoil temperature for proper cooling
and lubrication.
Engine cooling provided by Multi-
Row Modular radiator. Hydrostatic
fan drive gives the standard coolingpackage 110F ambient capability.
4
3
2
1
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3 533 mm (21") planetary, electronic,power shift transmission. This is thesame transmission found in the 990
Series II wheel loader. Electronic
shifting provides smooth consistent
shifts with finger tip controls housed
in the STIC controller. The
transmission is built around a center
shaft with a gear set cluster stacked
end-to-end to distribute load,
conserve space and transfer energy
efficiently. Large diameter perimeter
clutches coupled with high contactplanetary gear sets provide high
torque carrying capacity for long,
trouble-free life.
Axle-shaft, oil-disc brakes are fullyhydraulic, completely sealed and ne
need adjustment. Disc face grooves
provide cooling even when brakes a
applied for a long, fade resistant life
This design provides larger cooli
oil reservoir and thicker separato
plates than conventional brake
designs. This gives the brake high
heat dissipation rates giving it hig
capacity than conventional oil-di
brakes.
The location of the brake reduces
service time. Conventional brake
require final drive disassembly. T
axle-shaft brake design allows br
service while leaving the final dri
intact. Reduced service time and
machine downtime keeps operati
costs low.
Bevel gear sets and differentials a
common with the 990 Series II w
loader.
Impeller Clutch Torque Converter
allows the operator to modulate rimpull
from 100 percent to 20 percent of
maximum rimpull. After 20 percent of
maximum rimpull is achieved, further
pedal travel applies the brake. The
torque converter is equipped with a
lockup clutch for direct drive efficiency.
1 Impeller clutch. Locked in fullyengaged position for maximum
engine power transfer.
2 Lockup clutch. Provides direct driveefficiency in all three gears with
higher speeds and improved fuel
economy on long distance dozing.
2 1 3
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StructuresAdvanced design and materials provide superior strength.
Structures on the 844 are more than 90percent robotically welded. Thisprovides highly consistent welds with
deep plate penetration and excellent
plate fusion. The benefit is greater
fatigue strength and longer life than
with conventional welding methods.
Castings in the engine end-frame areused in critical high-stress areas to help
spread the load and reduce the number
of parts. The casting for the rear
trunnion mount also serves as an enginemount, which provides a load path for
the weight and torque of the engine to
travel down to the trunnion and then on
through to the axle. Other castings used
in the engine-end frame include: front
trunnion mounts, steering cylinder
brackets, articulation stops and lock
link.
1 Box-section rear frame absorbs shockloads and torsional forces, solidly
maintaining alignment for hitch pins
and driveline.
2 Four-plate front frame providesmaximum structural strength to resist
twisting loads during dozing
applications.
3 Upper and lower hitch pins pivot ondouble-tapered roller bearings and are
shaped to direct stress away from theend of the weld, resulting in a
smoother transition of stress loads.
4 Spread-hitch design helps square upthe frame and provides more
clearance for hydraulic lines. Double
tapered roller bearings and hardened
pins resist both horizontal and
vertical loads to increase life. The
spread hitch also makes service
access easier.
Engine and transmission mounts aredesigned to use mushroom and cup-
shaped ISO mounts, reducing
component vibration and sound levels.
The engine mounts directly to the rear
cross member, simplifying and
improving load transfer structure.
1
2
3
4
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1 Two separate, hydraulic systems.One system is for implements and
brakes while the other is for steering
and hydraulically-driven engine
cooling fan. The benefits of the
separate hydraulic systems are
increased cooling and elimination of
cross-contamination. If one system
runs hot or is contaminated, the otherwill be unaffected.
2 Blade control. Armrest-mountedcontrol lever sends signals to a pilot
valve for tilt/tip control and to a main
valve for lift control.
Tandem vane pumps providehydraulic flow for the lift, tilt and tip
functions. The circuit is well balanced
to provide control when all functions
are used simultaneously.
Well-proven pumps, valves and
cylinders are common with thoseused on large, Caterpillar track-type
tractors.
For improved serviceability, allhydraulic pumps are mounted on a
single pump drive.
3 Load Sensing Steering with STICControl System is a revolutionary
system that integrates steering and
transmission into a single controller.
The variable displacement pump
maximizes machine performance by
directing power through the steering
system only when needed. More
efficient use of power results indecreased fuel consumption and
higher production.
Simple side-to-side motions of the
operators left arm turn the machine
right or left.
Transmission shifting forward,
neutral, or reverse is controlled by the
operators fingers, and gear selection
is controlled by the operators thumb.
Caterpillars XT-3 and XT-5 hose, O-ringface seals and large-bore lift and tilt
cylinders top off the hydraulic system,delivering the performance and
durability owners expect. Reliable
components reduce leaks and help
protect the environment.
Hydrostatic cooling fan is used forengine, transmission and hydraulic
cooling. A variable displacement pu
drives the fans hydraulic motor so
fan speed varies with rpm. The fan
draws only the power needed for
cooling, reducing fuel consumption
increasing efficiency.
1
3
2
HydraulicsWell-balanced hydraulics deliver precise low-effort control and trouble-free operation.
2
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6
2
3
1
Operator StationComfort and control top quality operator station will help maximize productivity.
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Spacious cab design, incorporatinginnovations for operator comfort and
productivity, include excellent viewing
area, interior sound levels below 75
dB(A), Caterpillar Contour Series seat,
standard coat hook, cup holder, storage
bin, sun visor, intermittent wet-arm
wipers, and is radio-ready for two-way
radios.
1 STIC Control System is arevolutionary system that integrates
steering and transmission into a
single controller. Simple side-to-side
motions of the operators left arm
turn the machine right or left.
Transmission shifting forward,
neutral or reverse is controlled by the
operators fingers, and gear selection
is controlled by the operatorsthumb. These factors combine to
produce a fluid motion that reduces
effort and allows the operator to
work the machine for long periods of
time with little or no fatigue.
2 Left foot pedal operates ImpellerClutch Torque Converter for about
the first inch of travel, then engages
the brakes. Within the first inch of
pedal travel, rimpull can be
controlled from 100 percent to 20
percent.
3 Contour Series seat with airsuspension and retractable seat belt
is designed for comfort and support.
Seat cushions reduce pressure on the
lower back and thighs while
allowing unrestricted arm and leg
movement. The seat has three height
levels. The retractable seat belt
remains off the floor and is easy for
the operator to reach.
4 Quick-shift feature allows quickercycle times by shifting from 1st
forward to 2nd reverse.
5 Throttle lock allows operator topreset the engine speed and
concentrate on productivity. The
throttle lock can be deactivated
pressing the brake pedal.
6 Computerized Monitoring Syste(CMS) uses a vacuum fluorescendisplay allowing gauges to be ea
read in direct sunlight or at nigh
The three category operator aler
system is retained as part of the
CMS. In addition, the system
provides four diagnostic modes,
resulting in easy system
troubleshooting and minimum
downtime.
7 Seat-mounted hydraulic bladecontrols are attached to the righ
side of the seat. They are adjustafore and aft, with a height-adjus
armrest so that operators of any
can find a comfortable operating
position. Single lever control all
operator to control blade functio
lift/lower, tip and tilt. Switch co
on top of control lever allows op
of single or dual-tilt operation.
8 Torque converter lockup clutch
activated when operator presses
switch on the console. The 844
automatically shifts from torqueconverter drive to direct drive w
a set speed in each gear is reach
providing faster travel speeds an
less fuel consumption.
Large, viewing area enhances viewin all directions. Bonded glass in th
front window eliminates distracting
metal frames with the best operator
visibility to the blade.
5
4
8
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Heavy-duty blade linkage is commonwith a Caterpillar D9 Track-Type
Tractor. These well-proven components
are designed for tough applications.
Lift cylinders raise and lower bladefor efficient dozing action.
Two position tilt cylinder mounting
for increased flexibility for various
applications.
Cutting edges are DH-2 steel. Endbits are DH-3 to provide maximum
service life in tough materials.
Trunnions, pusharms and tag link aresized for large dozing loads.
Single-lever blade control hydraulicallyoperates blade raise, lower, tilt and tip.
Lift circuit features:
Four positions: raise, hold, lower and
float
Detente hold on float
Tilt/tip circuit features:
Operator selected single or dual-tilt
Finger tip control for tip operation
Low-effort control:
Single-lever implement control
Seat mounted controls
Pilot operated tilt/tip for lower levereffort
Operator has the option of either singleor dual-tilt operation by using a switchlocated on top of control lever. A
generous range of tilt motion enables
excellent control for dozing.
Blade ControlWell-proven Cat components deliver dependable service and ease of operation.
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Resilient and durable Caterpillar bl
are designed with excellent dozing
rolling characteristics.
Capacities and widths are set to
achieve increased productivity.
Special design allows for spreadi
of cover material as well as dozin
heavier loads.
High-strength, pressed rib
construction.
Large, Caterpillar track-type tract
bolt-on cutting edges and bottom
wear plates.
Fitted with Caterpillar standard
hardware and Ground Engaging
Tools (G.E.T.).
Rebuildable for long blade life.
1 Coal blade is designed for preciseproductive dozing while helping
retain load control with increased
capacity for lighter materials.
Wing angles help retain the lo
while dozing.
2 Semi-U blade combines thecharacteristics of the S and U bla
into one package.
Increased capacity with the
addition of short wings, whichinclude only the dozer end bit
without sacrificing spreading
characteristics of straight blad
The heavy-duty semi-U blade has thsame configuration as the semi-U b
but it is built with thicker plates for
more severe applications.
BladesCaterpillar blades are built to handle tough applications.
1
2
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Easy maintenance. In addition to theservicing features built into the engine,
the 844 includes:
Rear access stairs for easy,
comfortable access for operators and
service personnel.
Large engine access doors provide
excellent access to service points,
engine oil dipstick, diagnostic
connector, engine oil and fuel filters,
starting receptacle, air filter indicator,
air filters, fuel/water separator and the
ether starting aid cartridge.
Large service platform provides
passage to hydraulic filter, fuel fill
and transmission filters through easy-
to-open doors.
Large door provides entrance to
transmission and pumps when service
is required.
Large door in platform provides
access to fuses and electronic control
modules.
Batteries are accessible through
hinged doors in bumper.
Side access doors on the radiator
guard provide easy access for radiator
cleanout.
Grouped and labeled lube points,
accessible at ground level, make dailylube maintenance quick and easy.
Sight gauges in the hydraulic tanks
and radiator provide quick check for
fluid levels.
ServiceabilityLess time spent on maintenance means more time on the job.
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Cat Dealers offer a wide range of
services that can be set up under a
customer support agreement when
purchasing equipment. The dealer will
help customers choose a plan that can
cover everything from machine and
attachment selection to replacement, tohelp get the best return on the machine
investment.
Selection. Make detailed comparisonsof the machines under consideration
before buying. How long do
components last? What is the cost of
preventive maintenance? What is the
true cost of lost production? Cat Dealers
can give precise answers to these
questions.
Operation. Improving operatingtechniques can boost ones profits.
Cat Dealers have training videotapes,
literature and other ideas to help
increase productivity.
Maintenance. More and moreequipment buyers are planning for
effective maintenance before buying
equipment. Choose from the dealers
wide range of maintenance services at
the time of purchase. Repair option
programs guarantee the cost of repairs
up front. Diagnostic programs such as
SOS oil analysis and Technical
Analysis help avoid unscheduled
repairs.
Product support. Nearly all parts aravailable at the Cat Dealer parts
counter. Cat Dealers utilize a world
computer network to find in-stock p
to minimize machine downtime. Sa
money with remanufactured parts a
receive the same warranty andreliability as new products at cost
savings of 40 to 70 percent.
Replacement. Repair, rebuild orreplace? Cat Dealers can help evalu
the cost involved so the right choice
made.
Complete Customer SupportCat Dealer services help keep machines operating longer with lower costs.
8/13/2019 Wheel Dozer 844
14/2014 844 Wheel Dozer specifications
EngineFour-stroke cycle, twelve cylinder, turbocharged, aftercooled 3412E diesel engine.
Ratings at 2000 rpm* kW hp
Gross power 503 675
Net power 466 625
The following ratings apply at 2000 rpm
when tested under the specific standard
conditions for the specified standard:
Net Power kW hp PS
Caterpillar 466 625
EEC 80/1269 466 625
ISO 9249 466 625
SAE J1349
(JAN90) 461 618
DIN 70020 648
Dimensions
Bore 130 mm 5.4 in
Stroke 152 mm 6.0 in
Displacement 27 liters 1649 in3
Features high pressure injectors full electronic control parallel manifold porting with two
intake and two exhaust valves per
cylinder. Stellite-faced valves, hard
alloy steel seats and valve rotators cam-ground and tapered, aluminum-
alloy pistons with three keystone
designed rings, each cooled by oil
spray steel-backed, copper-bonded,
aluminum bearings, through-hardened
crankshaft journals pressure lubricated with full-flow
filtered and cooled oil dry-type air cleaner with primary and
secondary elements direct-electric 24-volt starting system,
75-amp alternator and two, 12-volt
190-amp-hour batteries engine/torque divider module is
isolation mounted to the main frame
reducing machine vibration and
structure-radiated noise water cooled turbocharged bearing for
longer life
Transmission21" planetary power shift transmission
with three speeds forward and reverse.
Maximum speeds, forward and reverse,with 45/65 R39 XLD D1A - Type A (L4)tires:
km/h mph
Forward 1 7.2 4.5
2 12.9 8.0
3 22.5 14.0
Reverse 1 8.2 5.0
2 14.2 8.8
3 25.0 15.5
Features electronic shift control self diagnostics accessible through
Computerized Monitoring System quick-shift feature controls for electric shift transmission
are housed in STIC controller Impeller Clutch Torque Converter is
standard with lockup in all three gears
Power rating conditions based on standard air conditions of
25C (77F) and 99 kPa (29.32 in Hg)
dry barometer used 35 API gravity fuel having an
LHV of 42 780 kJ/kg (18,390 Btu/lb)
when used at 30C (86F) [ref. a fuel
density of 838.9 g/L (7.001 lb/gal)] net power advertised is the power
available at the flywheel when the
engine is equipped with fan, air
cleaner, muffler and alternator no derating required up to 2286 m
(7,500 ft) altitude
35
40
45
50
55
60
30
25
20
15
10
5
0
100
110
120
130
140
70
80
90
60
50
40
30
20
10
0
lbs x1000
kg x1000
0
GRADEABILITY-P
ERCENT
(Grade+
RollingResist)
3rd Gear
1st Gear
1st Gear
2nd Gear
3rd Gear
2nd Gear
844Rimpull
vs.Ground Speed
30
25
40
35
45
20
15
10
5
0 4 8 12 16 20 24 km/h
0 2 4 6 8 10 12 14 16 mph
Speed
Rimpull
Torque Converter Direct Drive
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15/20844 Wheel Dozer specifications
CabIntegrated Rollover Protective Structure
(ROPS) is standard.
Features
meets OSHA and MSHA limits for
operator sound exposure with doors
and windows closed (according to
ANSI/SAE J1166 MAY90) ROPS meets the following criteria:
- SAE J394- SAE 1040 APR88
- ISO 3471-1986 also meets the following criteria for
Falling Objects Protective Structure
(FOPS):
- SAE J231 JAN81
- ISO 3449-1984 ROPS structure is certified for
84 286 kg (185,650 lb) operating
weight standard machine meets CE 89/392
safety directive, and CE 86/662
spectator (ISO 6393) and operator(ISO 6394) sound requirements
NOTE: When properly installed andmaintained, the cab (tested with doors andwindows closed according to ANSI/SAEJ1166 MAY90) meets OSHA and MSHArequirements for operator sound exposurelimits in effect at time of manufacture. Theoperator sound pressure level is 75 dB(A)when measured per ISO 6394 or86/662/EEC.
Final DrivesPlanetary final drive consists of a ring
gear, 3 planet gears and planet gear
carrier, and a sun gear.
Features ring gears splined to axle housing proprietary gear cutting and heat treat
methods used in the manufacture of
components full-floating bronze sleeve bearings
used on planet gears oil-bath lubrication of final drive
AxlesFixed front, oscillating rear (11).
Features maximum single-wheel rise and fall
572 mm (22.5") bevel gear set and differentials Duo-Cone seal between axle hub and
housing axle shaft brakes use SAE 30 or 40W (depending on
temperature) (oil change interval
every 2000 hours or 1 year)
BrakesSystem meets SAE/ISO regulations
Service brake features fully hydraulic, completely enclos
and sealed, oil-disc brakes adjustment free separate circuits for front and rear
axles high capacity axle-shaft design easy access for service dual pedal braking
Parking brake features multiple-disc, oil-enclosed brake located on transfer gear case outp
shaft
Secondary brake features Computerized Monitoring System
alerts operator if pressure drops b
875 psi (6035 kPa) and automatic
applies parking brake manual override possible to allow
movement of machine
TiresTubeless, low-aspect ratio. All steel
radial construction for increased trac
and stability, lower rolling resistanc
Tire choices
45/65 R39 L-4 (XLDDIA), Miche 40.5/75 R39 1-Star, Goodyear
NOTE: Caterpillar recommends that yoconsult a tire supplier to evaluate allconditions before selecting a tire modOther special tires are available on req
Monitoring SystemComputerized Monitoring System uses
technology to make a dramatic
difference in operator efficiency,
machine productivity and availability.
Features
gauges display engine coolant
temperature, transmission oil
temperature, engine oil pressure,
hydraulic oil temperature and fueltank level
tachometer/speedometer displays
engine speed and gear indicator alert indicators include: charging
system, parking/secondary brake,
supplemental steering, brake oil
pressure, engine coolant flow and
transmission filter status
8/13/2019 Wheel Dozer 844
16/2016 844 Wheel Dozer specifications
Implement system with double-section vane pump
Output at 2126 rpm and 6894 kPa (1000 psi)
with SAE (No 10 oil at 66C 150F) 342 L/min 89 gpm
Cylinders, double-acting:
lift, bore and stroke 133.5 mm x 1535 mm 5.25" x 60.5"
Cylinder, double-acting:
tilt and tip, bore and stroke 209.5 mm x 188 mm 8.25" x 7.5"Relief valve setting
Bulldozer (large pump) 18 650 kPa 2700 psi
Tilt cylinders (small pump) 20 150 kPa 2920 psi
Implement Hydraulic SystemCompletely sealed system with innovative low-effort controls.
Features (standard) completely enclosed system two independent systems. One for
steering and hydraulically-driven
engine cooling fan, one for
implements and brakes Cat built main implement pumps Caterpillars XT-3, XT-5 hose used
on entire machine except pilot lines in
cab full-flow filtering reusable couplings with O-ring face
seals
Service Refill CapacitiesU.S.
L Gallons
Fuel tankstandard 930 245
Cooling system 183 47.5
Crankcase 50 13
Transmission 70 18
Hydraulic tank 541 141
Differentials and final drives
Front 218 56.5
Rear 218 56.5
Hydraulic system
Implement and brakes
Tank only 174 45
Steering and engine cooling fanTank only 129 33.5
Min. turning radius
(over tires) 9910 mm 32' 6"
Hydraulic output at 2128 rpm
and 1000 psi (6900 kPa)
410 L/min 108 gpm
Relief valve setting
31 005 kPa 4500 psi
Features STIC control steering system center-point frame articulation front and rear wheels track hydraulic power with efficient, load-
sensing system variable displacement piston pump steering angle of 35 in each direction,
one-hand operation full flow filtering
SteeringFull hydraulic load sensing steering system meets SAE J1511 FEB94 and ISO 5010:
1992 specified standards.
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17/20844 Wheel Dozer specifications
844
ROPS5142 mm
(16' 9")
4600 mm(15' 1")
10 940 mm(35' 9")
2300 mm(7' 7")
3471 mm(11' 5")
552 mm(22")
3469 mm(11' 5")5185 mm
(17' 0")
DimensionsAll dimensions are approximate.
NOTE: Dimensions vary with blade. Refer to blade specifications chart on page 18.
8/13/2019 Wheel Dozer 844
18/2018 844 Wheel Dozer specifications
Blade Overall Digging Ground Maximum Total OperatingType Capacity Width Height Depth Clearance Tilt Weight Weight
Semi-U 15.9 m3 5418 mm 1813 mm 465 mm 1459 mm 829 mm 7273 kg 69 227 kg
20.7 yd3 213.3" 71.4" 18.3" 57.4" 32.6" 16,034 lbs 152,619 lbs
Heavy-duty
Semi-U 15.9 m3 5278 mm 1877 mm 609 mm 1372 mm 940 mm 7763 kg 69 717 kg
20.7 yd3
207.8" 73.9" 24" 54" 37" 17,100 lbs 153,685 lbsCoal 30.7 m3 5846 mm 2289 mm 609 mm 1372 mm 940 mm 6273 kg 68 227 kg
40.2 yd3 230" 90" 24" 54" 37" 13,830 lbs 150,415 lbs
Semi-U Blade: This unit combines the characteristics of the S and U blades into one package. It has increased capacity by the addition ofshort wings which include only the dozer end bits.
Blade Specifications
Blade ControlsMechanical operated raise/lower circuit.
Pilot operated tilt/tip circuit.
Lift circuit features four positions: raise, hold, lower and
float detente hold on float
Tilt/tip circuit features operator selected single or dual tilt finger tip control for tip operation
Control single-lever implement control seat mounted controls pilot operated tilt/tip for lower lever
effort
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19/20844 Wheel Dozer specifications
Standard EquipmentStandard and optional equipment may vary. Consult your Caterpillar Dealer for specifics.
ElectricalAlternator, 105-ampere
Converter, for 12-volt accessories
Diagnostic connector for starting and
charging systems
Electric starter (heavy-duty)
Electrical system, 24-volt
External lighting system, front and rear
Maintenance-free batteries
Starting receptacle for emergency
starting
Operator environmentAir conditioner, R-134A refrigerant
Contour Series Seat with air suspension
Cigarette lighter and ashtray
Coat hook
Computerized Monitoring System
Action alert system, three-category
Gauges:
tachometerfuel level
hydraulic oil temperature
transmission oil temperature
engine oil pressure coolant
temperature
Dome light (cab)
Electric horn
External two-post ROPS structure
Heater and defroster
Load-sensing steering
Quick-shift feature
Radio-ready cab for entertainment or
two-way radio (three-point mounting)
Rearview mirrors (interior and exterior
mounted)
Retractable seat belt 76 mm (3") wide
ROPS cab with sound suppression
Seat-mounted hydraulic controls
Sight gauges, hydraulic oil and engine
coolant
Single-lever blade control
STIC Control System
Storage for thermos, lunch box, cup
Sunshade/visor, front and rear
Throttle lock
Tinted glass
Transmission gear indicator
Wet-arm wiper/washers, front and rear
Power train
Cat 3412E HEUI engine
Fuel priming aid
Full hydraulic, enclosed, wet multiple-
disc service brakes and
parking/secondary
Impeller Clutch Torque Converter w
lockup clutch
Precleaner/ejector
Remote-mounted hydraulic engine f
Separated cooling system
Sound suppressed muffler
Supplemental steering
Swing-out cooler cores
Transmission,
21" planetary power shift (electro
3-speed forward/3-speed reverse
Other standard equipmentBackup alarm
Drawbar hitch with pin
Fenders (front and rear)
Hydraulic oil cooler
Muffler
Lighting, general purpose (four)
Locking engine enclosures
Power train/guardRear access stairs
Vandalism protection and caplocks
Tires45/65 R39 L-4 (XLDDIA), Micheli
kg lb
Blades
Semi-U 7273 16,034
Heavy-duty Semi-U 7763 17,100
Coal 6273 13,830
Fuel system 1 3
High Ambient Cooling Arrangement 60 132
Oil change system 5 11
kg
Quarter panel wiper washer 17
Starting aids
Cold weather starting system 180
Diesel fuel heater 4
Heater, engine coolant 3
Tires 40.5/75 R39 1-Star, Goodyear -1030 -2,
Optional EquipmentWith approximate changes in operating weights.
8/13/2019 Wheel Dozer 844
20/20
844 Wheel Dozer
AEHQ5307 (3-98)
Materials and specifications are subject to change without notice
Featured machines in photos may include additional equipment
See your Caterpillar Dealer for available options
www.CAT.com 1998 Caterpilla
Printed in U.S.A