D155AX-7 WH

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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   
Bore x stroke  5.51" x 6.50"  140 mm x 165 mm 
Piston displacement  930 in³  15.24 ltr 
Governor    All-speed and mid-range, electronic 
Horsepower :     
SAE J1995 - Gross  360 HP  268 kW 
ISO 9249 / SAE J1349 - Net  354 HP  264 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's automatic TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 2-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 start switch. 
Travel speed:     
1st Gear forward  2.4 mph  3.8 km/h 
1st Gear reverse  2.9 mph  4.6 km/h 
2nd Gear forward  3.5 mph  5.6 km/h 
2nd Gear reverse  4.2 mph  6.8 km/h 
3rd L Gear forward  4.7 mph  7.5 km/h 
3rd L Gear reverse  5.7 mph  9.2 km/h 
3rd Gear forward  7.2 mph  11.6 km/h 
3rd Gear reverse  8.7 mph  14.0 km/h 
 
Final Drives   
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 radius  7'0"  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 height  3.1"  80 mm 
Shoe width (standard/maximum)  610 mm / 710 mm  24" / 28" 
Ground contact area  6,193 in²  39955 cm² 
Ground pressure (tractor only)  11.9 psi  82.4 kPa / 0.84 kg/cm² 
Number of track rollers (each side)   
Number of carrier rollers (each side)   
 
Service Refill Capacities   
Fuel tank  165 U.S. gal  625 ltr 
Coolant  27.3 U.S. gal  103.5 ltr 
Engine oil  9.8 U.S. gal  37 ltr 
Damper  0.4 U.S. gal  1.5 ltr 
Hydraulic oil  24.2 U.S. gal  91.5 ltr 
Transmission, bevel gear, and steering system  23.8 U.S. gal  90 ltr 
Final drive (each side)  8.2 U.S. gal  31 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 weight  68,350 lb  31000 kg 
Operating weight  87,100 lb  39500 kg 
Ground pressure  15.4 psi  106 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 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  4.33"  110 mm 
Blade Tilt (Dual tilt) / 2  6.30"  160 mm 
Blade Tilt (Single Tilt) / 1  6.30"  160 mm 
Ripper Lift  7.09"  180 mm 
Ripper Tilt / 1  7.87"  200 mm 
Hydraulic oil capacity (refill):     
SIGMADOZER  22.5 U.S. gal  85 ltr 
Semi-U dozer  22.5 U.S. gal  85 ltr 
Full-U dozer  22.5 U.S. gal  85 ltr 
Ripper equipment (additional volume):     
Multi-shank ripper  9.8 U.S. gal  37 ltr 
Giant ripper  9.8 U.S. gal  37 ltr 

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