Komatsu Dozer D155AX-8

D155AX-8
The new Tier 4 Final D155AX-8 dozer incorporates well proven Komatsu engine emissions technology that does not interfere with daily operation. Class leading engine horsepower, large capacity Sigmadozer blade and automatic lockup torque converter efficiently move massive amounts of material while using less fuel than prior model. The operator cab is loaded with features to help maintain operator comfort during the work day.

Engine
Model		Komatsu SAA6D140E-7*
Type		4-cycle, water-cooled, direct injection
Aspiration	100 in³	Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders		6
Bore x stroke	140 mm x 165 mm	5.51" x 6.50"
Piston displacement	15.24 ltr	930 in³
Governor		Mid-range, electronic
Horsepower :
SAE J1995 - Gross	268 kW	360 HP
ISO 9249 / SAE J1349* - Net	264 kW	354 HP
Rated rpm		1900 rpm
Fan drive type		Hydraulic
Lubrication system :
Method		Gear pump, force lubrication
Filter		Full-flow
*Net horsepower at the maximum speed of radiator cooling fan: 239 kW 320 HP
**EPA Tier 4 Final emissions certified

TORQFLOW Transmission
Komatsu's automatic TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase, torque converter with lockup clutch, and a planetary gear, multipledisc clutch transmission which is hydraulically actuated and force-lubricated for optimum heat dissipation. Equipped with gearshift lock lever and neutral safety switch.
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

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

Steering 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 radius	2.14 m	7'0"

Undercarriage
Suspension: Oscillation-type with equalizer bar and forward mounted pivot shafts Track roller frame: Monocoque, high-tensilestrength steel construction K-Bogie undercarriage Lubricated track rollers are resiliently mounted 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.
Number of shoes (each side)	42
Grouser height	80 mm	3.1"
Shoe width (standard/maximum)	24" / 28"	610 mm / 710 mm
Ground contact area	39955 cm²	6,193 in²
Ground pressure (tractor only)	80.3 kPa / 0.82 kg/cm²	11.6 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

Operating Weight
Tractor weight Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment (including ROPS cab).	632700 kg	72,100 lb
Operating weight Including strengthened SIGMADOZER, giant ripper, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.	40500 kg	89,300 lb
Ground pressure	99.5 kPa / 1.01 kg/cm²	14.4 psi

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 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
Positions:	Blade lift	Raise, hold, lower, and float
	Blade tilt	Right, hold, and left
Additional control valve required for variable digging angle multi-shank ripper and giant ripper.
Positions:	Ripper lift	Raise, hold, and lower
	Ripper tilt	Increase, hold, and decrease
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"
Ripper Lift	180 mm	7.09"
Ripper Tilt / 1	200 mm	7.87"
Hydraulic oil capacity (refill):
SIGMADOZER	95 ltr	25.1 U.S. gal
Semi-U dozer	95 ltr	25.1 U.S. gal
Full-U dozer	95 ltr	25.1 U.S. gal
Ripper equipment (additional volume):
Multi-shank ripper	37 ltr	9.8 U.S. gal
Giant ripper	37 ltr	9.8 U.S. gal