• 92,820 lbs Operating Weight
  • 354 @1900 rpm Horsepower
  • 9.6 - 15.7 yd¬≥ Blade Capacity

D155PX-8 LGP

The new Tier 4 Final D155PX-8 LGP (Low Ground Pressure) dozer incorporates the proven Komatsu technology used in the D155AX-8 enhanced with two blade options and larger tracks on the ground. A newly designed 8-roller undercarriage provides greater traction and optimum balance while reducing ground pressure in half. Large capacity semi-u blade or angle blade move massive amounts of material and the wider cutting edge reduces the number of passes needed while grading. Class leading fuel efficiency and Komatsu Care complimentary 3 year/2000 hour scheduled maintenance lowers operating costs.

D155PX-8 LGP Walkaround


Auto-pitch Mode* (semi-u blade only)

To reduce operator effort and increase operating efficiency the new auto blade pitch mode sets blade pitch position between digging and dump positions while dozing. By pressing the autopitch switch it will toggle the pitch position from digging to dump position with no additional lever movements. The blade pitch control can be set through the monitor to automatically return to the digging position when reverse is selected.

* Requires dual tilt dozer

Heavy-duty aftertreatment system

This new system combines a Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR). The SCR NOx reduction system injects the correct amount of DEF at the proper rate, thereby decomposing NOx into non-toxic water (H2O) and nitrogen gas (N2).

Komatsu Auto Idle Shutdown

Komatsu auto idle shutdown automatically shuts the engine down after idling for a set period of time to reduce unnecessary fuel consumption and exhaust emissions. The amount of time before the engine is shutdown can be easily programmed from 5 to 60 minutes.

New Fuel Efficient Bulldozer

The new D155AX-8 LGP has achieved both high levels of productivity and fuel economy through usage of increased blade capacity and automatic transmission with lockup torque converter.

New Tier 4 Final Engine

The Komatsu SAA6D140E-7 engine is EPA Tier 4 Final emissions certified and provides exceptional performance while reducing fuel consumption. Based on Komatsu proprietary technologies developed over many years, this new diesel engine reduces nitrogen oxides (NOx) by more than 80% when compared to Tier 4 interim levels. Through the in-house development and production of engines, electronics, and hydraulic components, Komatsu has achieved great advancements in technology, providing high levels of performance and efficiency in virtually all applications.

LRP Undercarriage

The longer and wider undercarriage distributes machine weight* to cut the ground pressure in half and increase machine floatation. Wide 38 track shoes provide better traction and a balanced, smooth ride while moving massive amounts of material. An optional rotating bushing undercarriage PLUS (Parallel Link Undercarriage System) with 34” shoes is available that delivers up to 2 times life in abrasive, sandy soils and requires no bushing turn.

* Base machine w/38” shoes+ full fuel + Semi-u blade + long drawbar + operator



Komatsu SAA6D140E-7**
4-cycle, water-cooled, direct injection
Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders
Bore x stroke 140 mm x 165 mm 5.51" x 6.50"
Piston displacement 15.24 ltr 930 in³
Mid-range, electronic

SAE J1995 - Gross 268 kW 360 HP
ISO 9249 / SAE J1349* - Net 264 kW 354 HP
Rated rpm
1900 rpm
Fan drive type
Lubrication system:

Gear pump, force lubrication
*Net horsepower at the maximum speed of radiator cooling fan: 239 kW 320 HP

**EPA Tier 4 Final emissions certified    

Final Drive

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

Hydraulic System

Standard rear Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation. High flow hydraulics for towing winch is standard. Base machine is equipped with dual tilt and pitch dozer hydraulics for semi-u blade. Angle blade is equipped with dual tilt, no pitch.

Hydraulic control unit:
All spool control valves externally mounted beside the hydraulic tank.

Variable piston pump with capacity (discharge flow) of 325 L/min 85.9 U.S. gal for steering and 180 L/min 47.6 U.S. gal for implement 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 tilt dozer.

Positions: Blade lift Raise, hold, lower, and float

Blade tilt Right, hold, and left
Hydraulic cylinders
Double-acting, piston
Number of cylinders Bore Bore
Blade Lift / 2 110 mm 4.33"
Blade Tilt (Dual tilt) / 2 160 mm 6.30"
Blade Tilt (Single Tilt) / 1 160 mm 6.30"
Hydraulic oil capacity (refill):

Angle dozer 95 ltr 25.1 U.S. gal
Semi-U dozer 95 ltr 25.1 U.S. gal

Operating Weight

Tractor weight
38600 kg 85,100 lb
Operating weight
42100 kg 92,820 lb
Ground pressure 52.9 kPa 7.67 psi

Service Refill Capacities

Fuel tank 625 ltr  165 U.S. gal
Coolant 104 ltr 27.5 U.S. gal
Engine oil 37 ltr 9.8 U.S. gal
Damper 1.5 ltr 0.4 U.S. gal
Transmission, bevel gear, and steering system 90 ltr
23.8 U.S. gal
Final drive (each side) 31 ltr
8.2 U.S. gal
DEF tank 39 ltr 10.3 U.S. gal
Hydraulic oil capacity
95 ltr 25.1 U.S. gal


Angle Blade    
    Capacity 7.3 m3 9.6 yd3
    Width at cutting edge 5791 mm 19’0”
1353 mm 4’5”
    Tilt, max angle

9.5 degrees
    Tilt, max dimension
965 mm
38 in
6670 kg
14700 lb
Semi-u blade 39 ltr 10.3 U.S. gal
12.9 - 15.7 yd3 9.8 - 12.0 m3
    Width over end bits
4598 mm
    Weight ‘AR” spec / non ‘AR”
5775 kg / 5055 kg 12732 lb / 11,114 lb

TORQFLOW Transmission

Travel speed:
1st Gear forward 3.8 km/h  2.4 mph
1st Gear reverse 4.6 km/h  2.9 mph
2nd Gear forward 5.6 km/h  3.5 mph
2nd Gear reverse 6.8 km/h  4.2 mph
3rd L Gear forward 7.5 km/h  4.7 mph
3rd L Gear reverse 9.2 km/h  5.7 mph
3rd Gear forward 11.6 km/h  7.2 mph
3rd Gear reverse 14.0 km/h  8.7 mph


Suspension: Oscillation-type with equalizer bar and forward mounted pivot shafts

Track roller frame: Monocoque, high-tensilestrength steel construction

Fixed mounted 8-roller undercarriage
Lubricated track rollers are rigid mounted to the track frame.

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.

Number of shoes (each side) 45  
Grouser height 80 mm 3.1"
Shoe width (standard/maximum) 965 mm
Ground contact area 78,037 cm² 12,096 in²
Ground pressure (tractor only) 52.9 kPa
7.67 psi
Number of track rollers (each side)
Number of carrier rollers (each side)


  • Air cleaner, double element with dust indicator
  • Alternator, 140 ampere/24V
  • Backup alarm
  • Batteries, 200 Ah/2 x 12V
  • Battery disconnect switch
  • Blade lift cylinders with double dust seal
  • Color monitor, LCD
  • Decelerator pedal
  • Engine hood
  • Engine idle auto shutdown with adjustable timer
  • Engine intake centrifugal precleaner
  • Engine, gull-wing side covers
  • Engine shutdown secondary switch
  • Exhaust pipe with raincap
  • Fast fuel provision
  • Fenders
  • Front pull hook
  • Fuel pre-filter and primary filter
  • Grid heater starting aid in cold weather
  • High mount foot rests
  • Horn, warning
  • Hydraulic driven radiator cooling fan with manual reverse clean mode
  • Hydraulics for dual tilt and pitch dozer
  • Hydraulics for ripper VGR/MSR
  • KOMTRAX® Level 5
  • Komatsu Diesel Particulate Filter (KDPF)
  • Komatsu Variable Geometry Turbocharger (KVGT)
  • Komatsu Selective Catalytic Reduction (SCR)
  • Locks, filler caps and covers
  • Oil pressure check ports for power train
  • PM service connector
  • Radiator mask, double door, heavy-duty, hinged, perforated
  • Radiator reserve tank
  • Rear cover
  • ROPS cab (1420 kg, 3,131 lb)**
  • Air conditioner/heater/defroster

    --Condenser remote mounted
  • Cab accessories
  • Work lights
    --2 front, hood mounted

    --2 front, cab mounted

    --2 rear, fender mounter

    2 rear, cab mounted
    --1 rear, for ripper point
  • Seat, air suspension, fabric, heated, low back, rotates 12.5° to right, headrest
  • Seat belt, 76 mm 3", retractable
  • Seat belt indicator
  • Sealed electrical connectors
  • Starting motor, 11.0 kW/24V
  • Steering system: Hydrostatic Steering System (HSS)
  • Torque converter with auto lock-up
  • Track roller guards, end sections
  • Track shoe assembly
  • Sealed and lubricated
  • Transmission with auto/manual shift modes
  • Underguards, heavy duty
  • Hinged belly pans
  • Water separator, fuel
  • Wide core cooling package, 6 fins per inch spacing


Rear Attachment

  • HD Counterweight 9-plate with rigid drawbar, 3568 kg 7,860 lb
  • Hydraulic winch Allied H12E
  • Long drawbar

Dozer Equipment

  • Semi-U Blade
  • Angle Blade