Komatsu D155AX-7 WH Bulldozer

Komatsu D155AX-7 WH Bulldozer

Rated rpm 1900 rpm
Operating Weight 87,100 lb 39500 kg
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Tank Guard

9 mm 0.35" thick guarding protects the sides and rear of the fuel and hydraulic tank group from damage and debris.

Chassis Seal Package  

Chassis Seal Package

Additional sealing is added to the engine doors and chassis components to reduce the amount of debris entering the engine compartment.

Chassis Seal Package  

Deflector Bars and Bolt Guards

Strategically placed on the side, bottom and front of the main frame, deflector bars and bolt guards help redirect debris away from components.

Deflector Bars and BoltGuards  

Front Striker Bars

Angled front striker bars are designed to prevent debris from riding up on the track sand damaging the chassis. The bolt-on design allows for easy servicing.

Front Striker Bars  

HD Counterweight with Rear Striker Bars

The 4115 kg 9,072 lb counterweight optimizes machine balance for landfill applications and has bolt-on rear striker bars. Removable plates allow adjustments to meet special applications. Rear striker bars are also available for machines equipped with rippers.

HD Counterweight withRear Striker Bars  

Raised Cab Air Inlet with Pre-cleaner

The turbine type pre-cleaner removes large particles and extends the cab air filter life.


Roof Mounted AC Condenser

The AC condenser is mounted to the roof to protect it from debris and to increase cooling efficiency.

Roof Mounted ACCondenser  

Engine Thermal Guard

The thermal guard covers the exhaust manifold, KDPF, and hot side of the turbocharger, reducing the potential for combustible debris to come in contact with hot surfaces.

Engine Thermal Guard  

Engine Pre-cleaner with Screen

A protective screen is added to the standard centrifugal engine air precleaner to remove large particles from the engine air before they reach the filter elements.

Engine Pre-cleaner withScreen  

Final Drive and Idler Seals

Seal guards around the final drive form a stepped labyrinth to provide 360° of protection to help prevent debris from entering oil seal areas and extend component life. The front idler seals are also protected by additional guarding.


Powered Engine Underguard

The electric winch located on the left side of the mainframe powers the hinged, smooth bottom underguard which provides easy access to the engine compartment for cleaning accumulated trash.

Powered EngineUnderguard  

2 Piece Radiator Guard Doors and Auto Reversing Fan

The two-piece radiator guard doors allow easy access to the standard wide core radiator for cleaning.Computer controlled forward and reverse fan intervals allow the operator to concentrate on productivity while keeping the radiator clean.

2 Piece Radiator GuardDoors and AutoReversing Fan  

Rear Mounted Hydraulic Oil Cooler

The hydraulic oil cooler is relocated to the rear to increase cooling efficiency. It features the Mesabi flexible core heat exchanger for easier cleaning and maintenance.

Rear Mounted HydraulicOil Cooler  

Track Shoe Holes

Optional trapezoid shaped track shoe holes allow debris to be pushed through and reduce track compacting.


Additional Work Lights

The 2 hood mounted lights are relocated to the top of the cylinders along with 2additional lights to improve visibility over the trash rack.The cab is prewired for installation of a beacon light.


Trash Rack

The see through vertical bars of the trash rack were designed to ensure good operator visibility. The trash rack and blade are both painted black to reduce glare.

Trash Rack  

Cab Air Pre-cleaner

The optional cab air filtration system provides pre-cleaned, filtered air to the HVAC system.The cab is pressurized to minimize odors and dust.

Cab Air Pre-cleaner  

Engine

Model
Komatsu SAA6D140E-6*
Type
4-cycle, water-cooled, direct injection
Aspiration
Komatsu variable geometry turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders
6
Bore x stroke5.51" x 6.50"140 mm x 165 mm
Piston displacement930 in³15.24 ltr
Governor
All-speed and mid-range, electronic
Horsepower :

SAE J1995 - Gross360 HP268 kW
ISO 9249 / SAE J1349 - Net354 HP264 kW
Rated rpm
1900 rpm
Fan drive type
Hydraulic
Lubrication system :

Method
Gear pump, force lubrication
Filter
Full-flow
*EPA Tier 4 Interim and EU stage 3B emissions certified

TORQFLOW Transmission

Komatsu TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 2-phase, torque converter with lockup clutch, and a planetary gear, multiple-disc clutch transmission which is electronically controlled, hydraulically actuated and force-lubricated for optimum heat dissipation. Shift lock lever and neutral safety switch.

Travel speed:

1st Gear forward2.4 mph3.8 km/h
1st Gear reverse2.9 mph4.6 km/h
2nd Gear forward3.5 mph5.6 km/h
2nd Gear reverse4.2 mph6.8 km/h
3rd L Gear forward4.7 mph7.5 km/h
3rd L Gear reverse5.7 mph9.2 km/h
3rd Gear forward7.2 mph11.6 km/h
3rd Gear reverse8.7 mph14.0 km/h

Final Drive

Double-reduction, spur and planetary final drives increase tractive effort. Segmented sprockets are bolt-on for easy inthe- field replacement.

Steering System

Palm Command Control System (PCCS) lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to the left to make a left turn. Tilt it to the right for a right turn.

Hydrostatic Steering System (HSS) is powered by steering planetary units and an independent hydraulic pump and motor. Counter-rotation turns are also available. Wet, multiple-disc, pedal-controlled service brakes are spring-actuated and hydraulically released. Gearshift lock lever also applies parking brakes.


Minimum turning radius7'0"2.14 m

Undercarriage

K-Bogie undercarriage
Lubricated track rollers are resiliently mounted on the track frame with a bogie suspension system whose oscillating motion is cushioned by rubber pads.

Track shoes
Lubricated tracks. Unique dust seals for preventing entry of foreign abrasives into pin-to-bushing clearance for extended service. Track tension easily adjusted with grease gun.

Suspension
Oscillation-type with equalizer bar and forward mounted pivot shafts
Track roller frame
Monocoque, high-tensilestrength steel construction
Rollers and idlers
Lubricated
Number of shoes (each side)
42
Grouser height3.1"80 mm
Shoe width (standard/maximum)610 mm / 710 mm24" / 28"
Ground contact area6,193 in²39955 cm²
Ground pressure (tractor only)11.9 psi82.4 kPa / 0.84 kg/cm²
Number of track rollers (each side)
7
Number of carrier rollers (each side)
2

Service Refill Capacities

Fuel tank165 U.S. gal625 ltr
Coolant27.3 U.S. gal103.5 ltr
Engine oil9.8 U.S. gal37 ltr
Damper0.4 U.S. gal1.5 ltr
Hydraulic oil24.2 U.S. gal91.5 ltr
Transmission, bevel gear, and steering system23.8 U.S. gal90 ltr
Final drive (each side)8.2 U.S. gal31 ltr

Operating Weight

Tractor weight
Including rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment.

Operating weight
Including strengthened SIGMADOZER®, giant ripper, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.

Tractor weight68,350 lb31000 kg
Operating weight87,100 lb39500 kg
Ground pressure15.4 psi106 kPa / 1.08 kg/cm²

Hydraulic System

Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit:
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 325 ltr/min 85.9 U.S. gal/min for steering and 180 ltr/min 47.6 U.S. gal/min for implemented at rated engine rpm.

Relief valve setting
. . . for implement 27.5 MPa 280 kg/cm² 3,980 psi
. . . for steering 38.2 MPa 390 kg/cm² 5,550 psi

Control valves:

Spool control valve for SIGMADOZER®, Semi-U tilt dozer and Full-U

Positions:Blade liftRaise, hold, lower, and float

Blade tiltRight, hold, and left
Additional control valve required for variable digging angle multi-shank ripper and giant ripper.

Positions:Ripper liftRaise, hold, and lower

Ripper tiltIncrease, hold, and decrease
Hydraulic cylinders
Double-acting, piston
Number of cylindersBoreBore
Blade Lift / 24.33"110 mm
Blade Tilt (Dual tilt) / 26.30"160 mm
Blade Tilt (Single Tilt) / 16.30"160 mm
Ripper Lift7.09"180 mm
Ripper Tilt / 17.87"200 mm
Hydraulic oil capacity (refill):

SIGMADOZER22.5 U.S. gal85 ltr
Semi-U dozer22.5 U.S. gal85 ltr
Full-U dozer22.5 U.S. gal85 ltr
Ripper equipment (additional volume):

Multi-shank ripper9.8 U.S. gal37 ltr
Giant ripper9.8 U.S. gal37 ltr

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