For a versatile mining dozer capable of transitioning from ripping solid rock to cleanup around the dragline, the Komatsu D475A-8 stands out. Featuring an automatic lockup torque converter, the D475A-8 is engineered for high production levels while minimizing fuel consumption.
- Up to 10% increase in productivity compared to previous models.
- Over 11% more engine power in reverse compared to forward direction.
- 10% reduction in fuel consumption with automatic transmission and lockup torque converter compared to manual gearshift mode.
Product Features and benefits:
- Lockup Torque Converter: Engineered for exceptional production, the lockup torque converter ensures a more efficient transfer of power to the driveline. This design aims to decrease cycle times and enhance overall production.
- Low Undercarriage Design: The dozer is equipped with a low drive undercarriage, strategically designed to reduce wear and tear on the machine while providing comfort and stability. The minimal moving parts help maintain high levels of traction and production during dozing and ripping.
- Structural Improvements: The D475A-8 features a more reliable mainframe with twice the design life compared to previous models. This enhancement is designed to reduce maintenance costs and minimize machine downtime.
- Blade Auto-Pitch: The dozer incorporates a blade auto-pitch mode, designed to increase dozing efficiency while reducing operator efforts.
- Ripper Auto-Return: The ergonomic ripper control lever includes an auto-return function for less fatiguing operation. It automatically raises the ripper after momentarily actuating the control lever while the machine is in reverse.
- Track Shoe Slip Control: The track shoe slip control automatically manages engine speed to minimize slip during ripping operations, providing more control for the operator.
- Operator Comfort: The dozer is designed to maximize operator comfort and productivity with enhancements such as an upgraded cab suspension and palm control joysticks.
- Single Blade Linkage: The all-new blade support structure significantly reduces blade side sway, offering enhanced visibility and fewer maintenance points compared to previous models.
- Maintenance Features: Engineered to minimize planned downtime, the D475A-8 includes features like centralized greasing points, a ground-level fill/evac service center, and battery and starter isolators with lockout tagout functionality.
Product Specifications for D475A-8:
Engine:
- Model: Komatsu SAA12V140E-7
- Type: 4-cycle, water-cooled, direct injection
- Aspiration: Turbocharged, air-to-air charge air cooler, cooled EGR
- Number of Cylinders: 12
- Bore x Stroke: 5.51 x 6.50 in
- Piston Displacement: 1,860 in³
- Horsepower (SAE J1995):
- Gross: Forward 934 HP, Reverse: 1,040 HP
- Horsepower (ISO 9249/SAE J1349):
- Net: Forward 890 HP, Reverse 968 HP
- Rated RPM: 2,000 rpm
- Fan Drive Type: Hydraulic
- Lubrication System:
- Method: Gear pump, force lubrication
- Filter: Full-flow
- U.S. EPA Tier 4 Final emission certified
TORQFLOW Transmission:
- Water-cooled, 3-element, 1-stage, 1-phase torque converter with lockup clutch.
- Planetary gear, multiple-disc clutch transmission.
- Gearshift lock lever and neutral safety switch.
- Gear (Forward/Reverse):
- 1st: 2.1 mph / 2.7 mph
- 2nd: 3.9 mph / 5.2 mph
- 3rd L: 4.6 mph / 5.6 mph
- 3rd: 7.2 mph / 8.9 mph
Steering System:
- Palm Command Control System (PCCS), joystick-controlled.
- Wet multiple-disc steering clutches, spring-loaded and hydraulically released.
- Wet multiple-disc, pedal/lever-controlled steering brakes.
- Minimum Turning Radius: 15 ft. 1 in
Undercarriage:
- Suspension: Oscillating equalizer bar and pivot shaft.
- Track Roller Frame: Cylindrical, high-tensile-strength steel construction.
- Rollers and Idlers: Lubricated track rollers.
- Komatsu Bogie (K-Bogie) undercarriage.
- Extreme Service Track Shoes available.
Fuel and Lubricant Capacity (Refill):
- Fuel Tank: 507.2 US gal
- Coolant: 70 US gal
- Engine: 31.7 US gal
- Torque Converter, Transmission, Bevel Gear, and Steering System: 55.5 US gal
- Final Drive (each side): 19.8 US gal
Operating Weight:
- Tractor: 194,450 lbs.
- Full Equipment: 254,195 lbs.
- Ground Pressure: 19.35 psi
Hydraulic System:
- Closed-center load sensing system (CLSS).
- Variable piston pump with a capacity of 541 L/min (142.9 US gpm).
- Relief Valve Setting: 3,983 psi
- Spool Control Valves for Semi-U tilt dozer, Full-U tilt dozer, variable digging angle multi-shank ripper, and giant ripper.
Hydraulic Cylinders:
- Blade Lift: 7.1 in
- Blade Tilt (Single Tilt): 9.8 in
- Blade Tilt (Dual Tilt): 9.8 in
- Ripper Lift: 8.9 in
- Ripper Tilt: 8.9 in
Hydraulic Oil Capacity (Refill):
- Semi-U Dozer or U Dozer: 50.2 US gal
- Giant Ripper: 34.3 US gal
- Multi-shank Ripper (Variable): 34.3 US gal
Further information on this machine can be viewed by visiting this link https://www.komatsu.com/products/dozers/surface-mining-dozers/d475a-8
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