D375A-6

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Engine   
Model    Komatsu SAA6D170E-5* 
Type    4-cycle, water-cooled, direct injection 
Aspiration    Turbocharged, air-to-air aftercooled, cooled EGR 
Number of cylinders   
Bore x stroke  6.69" x 6.69"  170 mm x 170 mm 
Piston displacement  1,413 in³  23.15 ltr 
Governor    All-speed and mid-range, electronic 
Horsepower:     
SAE J1995 - Gross  636 HP  474 kW 
ISO 9249 / SAE J1349 - Net  610 HP  455 kW 
Hydraulic fan at maximum speed - Net  580 HP  433 kW 
Rated rpm    1800 rpm 
Fan drive type    Hydraulic 
Lubrication system:     
Method    Gear pump, force lubrication 
Filter    Full-flow 
TORQFLOW Transmission   
Komatsu TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase torque converter with lockup clutch and a planetary gear, multiple-disc clutch transmission which is hydraulically actuated and force-lubricated for optimum heat dissipation. Gearshift lock lever and neutral safety switch help prevent accidental starts. 
Gear  Forward  Reverse 
1st  2.2 mph
3.5 km/h 
2.9 mph
4.6 km/h 
2nd  4.2 mph
6.8 km/h 
5.5 mph
8.9 km/h 
3rd L  5.0 mph
8.0 km/h 
6.0 mph
9.7 km/h 
3rd  7.3 mph
11.8 km/h 
9.8 mph
15.8 km/h 
Final Drives   
Double-reduction final drive of spur and planetary gear sets to increase tractive effort and reduce gear tooth stresses for long final drive life. Segmented sprocket teeth are bolt-on for easy replacement. 
Steering System   
PCCS, joystick controlled, wet multiple-disc steering clutches are spring-loaded and hydraulically released.Wet multiple-disc, pedal/lever controlled steering brakes are spring-actuated hydraulically released and require no adjustment. Steering clutches and brakes are interconnected for easy, responsive steering. 
Minimum turning radius  13'9"  4.2 m 
Undercarriage   
Suspension    Oscillating equalizer bar and pivot shaft 
Track roller frame    Cylindrical, high-tensile-strength steel construction 
Rollers and idlers    Lubricated track rollers 
K-Bogie undercarriage    Lubricated track rollers are resiliently mounted to the track frame with a bogie suspension system whose oscillating motion is cushioned by rubber pads. 
Extreme service track shoes    Lubricated tracks. Unique seals prevent entry of foreign abrasives into pin to bushing clearances to provide extended service life. Track tension is easily adjusted with grease gun. 
Number of shoes (each side)    41 
Grouser height:     
Single grouser  3.7"  93 mm 
Shoe width (standard)  24"  610 mm 
Ground contact area  7,527 in²  48560 cm² 
Ground pressure (tractor)  15.6 psi  108 kPa / 1.10 kg/cm² 
Number of track rollers   
Number of carrier rollers   
Extreme service shoes:  Ground contact area:  Ground** pressure: 
24'' / 610 mm
Additional weight - 0 lb / 0 kg 
7,527 in²
48560 cm² 
21.0 psi
1.48 kgf/cm² / 145 kPa 
28'' / 710 mm
Additional weight - 1,500 lb / 680 kg 
8,760 in²
56520 cm² 
18.2 psi
1.28 kgf/cm² / 126 kPa 
32'' / 810 mm
Additional weight - 3,000 lb / 1360 kg 
9,990 in²
64480 cm² 
16.0 psi
1.13 kgf/cm² / 111 kPa 
** Ground pressure based on tractor, Semi-U tilt dozer, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.     
Coolant and Lubricant Capacity (refill)   
Fuel tank  317.0 U.S. gal  1200 ltr 
Coolant  31.7 U.S. gal  120 ltr 
Engine  22.7 U.S. gal  86 ltr 
Torque converter, transmission, bevel gear, and steering system  39.6 U.S. gal  150 ltr 
Final drive (each side)  17.1 U.S. gal  65 ltr 
Operating Weight   
Tractor weight
Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. 
117,290 lb  53200 kg 
Including Semi-U tilt dozer, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.  157,940 lb  71640 kg 
Ground pressure  21.0 psi  1.48 kg/cm² / 145 kPa 
Hydraulic System   
Hydraulic control unit:     
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 366 ltr/min / 96.7 U.S. gal/min for implement at rated engine rpm.     
Relief valve setting . . . for implement  3,980 psi  27.5 MPa
280 kg/cm² 
Control valves:     
Spool control valves for Semi-U tilt dozer and Full-U tilt dozer.     
• 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.     
• Ripper lift    Raise, hold, and lower 
• Ripper tilt    Increase, hold, and decrease 
Hydraulic cylinders:
Double-acting, piston 
Number of cylinders:  Bore: 
• Blade lift  5.5" / 140 mm 
• Blade tilt  7.1" / 180 mm 
• Ripper lift  7.9" / 200 mm 
• Ripper tilt  7.1" / 180 mm 
Hydraulic oil capacity (refill):     
Semi-U dozer or U dozer  34.4 U.S. gal  130 ltr 
Ripper equipment (additional volume):     
Giant ripper (variable)  11.9 U.S. gal  45 ltr 
Multi-shank ripper (variable)  11.9 U.S. gal  45 ltr 

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