Komatsu D475A-5

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When mines are looking for a dozer with the versatility to go from stripping overburden one day to ripping solid rock or stirring the leech field the next and cleaning up around the dragline the day after they call on the D475A-5. Utilizing an automatic lock-up torque converter, the D475A-5 give the operator a great combination of power and speed and both of those equal production. Low drive undercarriage with K-bogies make the D475A-5 a superior ripping tractor. Palm control joysticks, air suspension seat that rotates 15 degrees to the right and low dBA cab provide the operator with a comfortable environment with the tools he needs to maximize production.


Model   Komatsu SAA12V140E-3
Type   4-cycle, water-cooled, direct injection
Aspiration   Turbocharged, air-to-air aftercooled
Number of cylinders   12
Bore x stroke 5.51" x 6.50" 140 mm x 165 mm
Piston displacement 1,860 in³ 30.48 ltr
Flywheel horsepower:    
SAE J1349 899 HP 671 kW
DIN6270 890 HP 644 kW
Hydraulic fan at maximum speed 860 HP 641 kW
Rated rpm   1900 rpm
Governor   All-speed, electronic
Lubrication system:    
Method   Gear pump, force lubrication
Filter   Full-flow and bypass combined
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 2.1 mph  
3.3 km/h 2.6 mph  
4.2 km/h    
2nd 3.9 mph  
6.2 km/h 5.0 mph  
8.0 km/h    
3rd 7.0 mph  
11.2 km/h 8.7 mph  
14.0 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 15'1" 4.6 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 4.1" 105 mm
Shoe width (standard) 32" 810 mm
Ground contact area 11,360 in² 73290 cm²
Ground pressure (Tractor) 16.2 psi 112 kPa
1.14 kg/cm²    
Number of track rollers   8
Number of carrier rollers   2
Extreme service shoes 36" 910 mm
Additional weight 4,030 lb 1830 kg
Ground contact area 12,762 in² 82340 cm²
Tractor ground pressure 14.8 psi 102 kPa
1.04 kg/cm²    
Service Refill Capacities    
Fuel tank 441 U.S. gal 1670 ltr
Coolant 72.6 U.S. gal 275 ltr
Engine 32.0 U.S. gal 121 ltr
Torque converter, transmission, bevel gear, and steering system 55.5 U.S. gal 210 ltr
Final drive (each side) 19.8 U.S. gal 75 ltr
Operating Weight    
Tractor weight    
Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. 184,290 lb 83590 kg
Operating weight    
Including strengthened Full-U tilt dozer, giant ripper, steel cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank. 238,960 lb 108390 kg
Ground pressure 24.0 psi 166 kPa
1.69 kg/cm²    
Hydraulic System    
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.    
Relief valve setting 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
Control valves (Spool control valves 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
Hydraulic cylinders    
Number of cylinders Bore Bore
Blade lift / 2 7.09" 180 mm
Blade tilt / 1 9.84" 250 mm
Ripper lift / 2 8.86" 225 mm
Ripper tilt / 2 8.86" 225 mm
Hydraulic oil capacity (refill):    
Semi-U tilt dozer 48 U.S. gal 180 ltr
U tilt dozer 48 U.S. gal 180 ltr
Ripper equipment (additional volume):    
Giant ripper 34 U.S. gal 130 ltr
Multi-shank ripper 34 U.S. gal 130 ltr