Komatsu D375A-6

Double tap to zoom



The D375A-6 is a great combination of power and balance; power for digging and pushing, balance for stability on slopes and for ripping. Giant or multi-shank rippers are available as is a wide lighting and maintenance options specifically designed for the demands of the mining industry. A lock-up torque converter lets the D375A-6 to shift into direct drive when pushing to increase speed and production.


Model   Komatsu SAA6D170E-5*
Type   4-cycle, water-cooled, direct injection
Aspiration   Turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders   6
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
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 Drive    
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
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   8
Number of carrier rollers   2
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 2 5.5" / 140 mm
• Blade tilt 1 7.1" / 180 mm
• Ripper lift 2 7.9" / 200 mm
• Ripper tilt 2 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