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Komatsu D475A-8 Bulldozer
When you need a versatile mining dozer that can go from ripping solid rock to cleaning up around the dragline, the Komatsu D475A-8 is a solid choice. Using an automatic lockup torque converter, the D475A-8 combined power and speed is designed for high production with minimal fuel consumption.
Lockup torque converter: Engineered for exceptional production. Komatsu’s lockup torque converter produces a more efficient transfer of power to the driveline, designed to help decrease cycle times and increase production.
Low undercarriage design: Equipped with a low drive undercarriage designed to help reduce wear and tear on your machine while still delivering comfort and stability. Minimal moving parts to help maintain high levels of traction and production when dozing and ripping.
Structural improvements: The D475A-8 features a more reliable mainframe with twice the design life over previous models, designed to reduce maintenance costs and machine downtime.
Blade auto-pitch: Designed to increase dozing efficiency while reducing operator efforts with blade auto-pitch mode.
Ripper auto-return: The new, ergonomic ripper control lever incorporates an auto-return function designed for less fatiguing operation, automatically raising the ripper after momentarily actuating the control lever while the machine is in reverse.
Track shoe slip control: Track shoe slip control automatically controls engine speed and minimizes slip during ripping operation, so your operator doesn’t have to.
Operator comfort: Designed to maximize operator comfort and productivity with thoughtful design enhancements like an upgraded cab suspension and palm control joysticks.
Single blade linkage: Significantly reduced blade side sway with an all-new blade support structure. The new support structure has fewer maintenance points with enhanced visibility over previous models.
Maintenance features: The D475A-8 is engineered to minimize planned downtime and make maintenance efficient with features such as centralized greasing points, ground-level fill/evac service center and battery and starter isolators with lockout tagout functionality.
|Operating Weight||254,195 lbs.|
|Fuel Tank Capacity||507.2 Gallons|
|Frame Type||Track Roller Frame: Cylindrical, high-tensile-strength steel construction|
|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.|
|Engine Type||4-cycle, Direct Injection|
|Net Horsepower||Forward: 890 HP
Reverse: 968 HP
|Bore x Stroke||5.51” x 6.50”|
|Speed - Foreward||1st: 2.1 MPH
2nd: 3.9 MPH
3rd L: 4.6 MPH
3rd: 7.2 MPH
|Speed - Reverse||1st: 2.7 MPH
2nd: 5.2 MPH
3rd L: 5.6 MPH
3rd: 8.9 MPH
|Gross Horsepower||Forward: 934 HP
Reverse: 1040 HP
|Rated RPM||2000 RPM|
|Lubrication System||Method: Gear pump, force lubrication
|Aspiration||Turbocharged, air-to-air cooler, cooled EGR|
|Piston Displacement||1,860 in ³|
|Fan Drive Type||Hydraulic|
|Transmission Type||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.|
|Roller Type||Lubricated track rollers|
|Ground Pressure||16.71 PSI (Tractor)
19.35 PSI (weight)
19.1 PSI (Semi-U Dozer)
19.4 PSI (U Dozer)
|Grouser Height||Single: 4.1”|
|Control Valve||Spool control valve for Semi-U tilt dozer and 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 Tank Capacity||50.2 Gallons|
|Hydraulic System||Hydraulic control unit
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 541 L/min (142.9 US gal/min) for implement at rated engine rpm.
|Hydraulic Cylinders||Number of Cylinders x Bore
Blade lift: 2 x 7.1”
Blade Tilt (Single tilt): 1 x 9.8”
Blade Tilt (Dual tilt): 2 x 9.8”
Ripper Lift: 2 x 8.9”
Ripper Tilt: 2 x 8.9”
|Relief Valve Setting||3,983 PSI|
|Blade Height||8’10” (Semi-U Dozer)
8’7” (U Dozer)
|Blade Capacity||35.6 yd³ (Semi-U Dozer)
44.5 yd³ (U Dozer)
|Suspension||Oscillating equalizer bar w/shoulder pad and pivot shaft|
|Steering||Palm Command Control System (PCCS), joystick controlled, wet multipledisc 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.|
|Shoes||41 each side|
|Blade Length`||17'3" (Semi-U Dozer)
20'4" (U Dozer)
|Ground Contact||9,957 in²|
Operator environment and equipment
Service and maintenance