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Features :- Komatsu Bull Dozers
- D31PX-21
The Komatsu SAA4D102E-2 turbocharged diesel engine
provides an output of 75 HP / 56 kW , with excellent productivity. This engine is Tier 2 EPA, EU, and Japan emissions certified.
Palm Command Control System (PCCS)
Left hand controls all tractor motion. Right hand controls all blade movements.
Gull-wing engine side doors for easy and safer servicing.
Radiator Nose
Sound deflection style for reduced ambient noise.
Heavy-duty
punched grill
New design, larger diameter shimmed center ball
High capacity
Power Angle Tilt dozer combines the highest power in its class with outstanding productivity.
Komatsu Hydrostatic Transmission (KomStat)
offers palm control of speed (3 forward and 3 reverse), turning directional changes, and power steering with PPC valve control.
Electronic Monitoring System
prevents minor problems from developing into major ones.
Optional quadrangle design, low noise pressurized ROPS cab
One-piece front glass window offers exceptional front, side, and rear visibility.
Side compartment doors
for easy access to battery and hydraulics.
Final drives and travel motors
are completely protected within the track shoe width.
Bolt-on sprocket
for ease of maintenance.
Modular power train for increased serviceability and durability.
Intermediate speed selection
enables setting of optimum travel speed to job conditions, improving grading accuracy.
Specifications :- Komatsu
Bull Dozers
- D31PX-21
Engine
Direct injection fuel system. All-speed mechanical governor. Forced lubrication driven by gear pump. Full-flow for lube purification. Dry-type air cleaner with automatic dust evacuator and dust indicator. 24 V / 5.5 kW electric starter motor. 24 V / 25 A alternator. 2 x 12 V / 60 Ah batteries.
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Model
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Komatsu
SAA4D102E-2
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Type
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Water-cooled,
4-cycle, emissionized
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Aspiration
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Turbocharged
and air-to-air aftercooled
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Number
of cylinders
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4
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Bore
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4.02''
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102
mm
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Stroke
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4.72''
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120
mm
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Piston
displacement
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240
in³
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3.9
ltr
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Net
flywheel horsepower*:
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SAE
J1349@ 2000 rpm
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75
HP
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56
kW
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DIN
6270@ 2000 rpm
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76
HP
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56
kW
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Net
maximum torque@ 1300 rpm
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284
lbft
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39.2
kgm / 384 Nm
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Governor
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All-speed,
mechanical
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Filter
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Full-flow
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*
Net flywheel horsepower
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Output
for standard engine (SAE J1349) including air cleaner,
alternator (not charging), water pump, lubricating oil pump,
fuel pump, muffler, and fan.
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Hydroshift Transmission
Dual-path, hydrostatic transmission provides infinite speed change up to 5.3 mph / 8.5 km/h. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Gearshift lock lever and neutral safety switch prevent machine from starting accidently.
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Travel
speed
(quick shift mode)
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Forward
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Reverse
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1st
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02.1
mph
03.4 km/h
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02.5
mph
04.1 km/h
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2nd
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03.5
mph
05.6 km/h
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04.0
mph
06.5 km/h
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3rd
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05.3
mph
08.5 km/h
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05.3
mph
08.5 km/h
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Travel
speed
(variable mode)
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Forward
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Reverse
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-
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0.55.3
mph
0.8 - 8.5 km/h
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0.55.3
mph
0.88.5 km/h
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Maximum
drawbar pull:
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27,580
lb
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12500
kgf / 123 kN
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Steering
Palm Command Control System (PCCS) joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the joystick to the left to make a left turn. Tilt it to the right for a right turn. Tilting the joystick fully to the left or right activates counter-rotation. Hydrostatic steering eliminates steering clutches and brakes, providing smooth powerful turns. Fully electronic control enables smooth, shockless control. The PCCS utilizes shift buttons to increase and decrease speed.
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Minimum
turning radius:
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8'4''
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2.54
m
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Note:
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(As
measured by track marks on the ground)
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Undercarriage
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Suspension
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Rigid
type
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Track
roller frame
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Box
section, high-tensile-strength steel structure
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Rollers
and idlers
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Lubricated
idlers/carrier rollers, track rollers are sealed with floating
seals
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Lubricated
tracks:
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Unique
dust seals for preventing entry of foreign abrasive into
pin-to-bushing clearance for extended service. Track tension
easily adjusted with grease gun.
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Number
of carrier rollers
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1(each
side)
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Number
of track rollers
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6
(each side)
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Number
of shoes
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40
(each side)
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Grouser
height
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1.9''
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47
mm
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Shoe
width (standard)
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24"
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600
mm
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Ground
contact area
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4,061
in²
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26200
cm²
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Ground
pressure (bulldozer)
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4.12
psi
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0.29
kgf/cm² / 28 kPa
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Track
gauge
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5'5''
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1650
mm
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Length
of track on ground
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7'2''
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2185
mm
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Standard Equipment :- Komatsu
Bull Dozers
- D31PX-21
Air cleaner, double element with dust indicator
Alternator, 35 ampere
Backup alarm
Batteries, 2 x 12 V / 60 Ah
Blower cooling fan
Decelerator pedal
Electronic instrument monitor panel
Engine hood and gull-wing side covers
Fenders
Front pull hook
High-mount footrests
Intake pipe with precleaner
Integrated double flange rollers
Lighting system (includes 2 front, 1 rear)
Muffler with curved exhaust pipe
Palm Command Control System (PCCS)
Radiator core protective grid
Radiator guard door, bolt on
Radiator reserve tank
Rear cover
Rearview mirror
ROPS mounting brackets
Seat belt, 3" / 76 mm retractable
Starting motor, 24 V / 5.5 kW
Suspension seat, reclining with headrest
Track roller guard, end section
Track shoe assembly:
Sealed and lubricated track
24 " / 600 mm single grouser shoe
Underguards, oil pan and transmission
Water separator
Optional Equipment :- Komatsu
Bull Dozers
- D31PX-21
Hitch
Additional weight (including hydraulic control unit) 1270 lb / 575 kg
Beam length 5'0" / 1530 mm
Maximum digging depth 12.4" / 315 mm
Maximum lift above ground 1'5" / 435 mm
Open ROPS heater
ROPS cab
Additional weight*, 1,430 lb / 650 kg
Meets ISO 3471, SAE J1040 APR88, and ISO 3449 FOPS standards.
All-weather, enclosed pressurized cab
Dimensions
Length: 5'2" / 1575 mm
Width: 4'1"/ 1255 mm
Height: 5'4" / 1625 mm
Height from floor to ceiling 5'0" / 1515 mm
*Including weight of air conditioner
ROPS cab or ROPS canopy must be ordered for all machines.
ROPS canopy
Additional weight 680 lb 310 kg
Meets ISO 3471, SAE J1040 APR88, and ISO 3449 FOPS standards.
Roof dimension
Length: 5'2" / 1575 mm
Width: 4'1" / 1255 mm
Height from operator compartment floor 5'2" / 1575 mm
Suspension seat
Reclining with fabric material and headrest (cab only)
Sweeps and screens
Track shoe assembly
Sealed and lubricated track
24" 600mm swamp shoe Track guard, full length, segmented
Vandalism protection cover for instrument panel
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