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Komatsu D375A-8 Bulldozer

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Last Updated : 2018-01-22

Rated rpm	1800 rpm
Operating Weight	73,410 kg 161,840 lb

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Feature Parameter

Tier 4 Final Emission Certified Engine

• Komatsu’s New U.S. EPA Tier 4 Final emission regulation-compliant engine
• Auto idle stop function

Performance

• 20% more power in reverse can increase productivity and reduce cycle times
• Automatic transmission with lockup torque converter
• Selectable working modes
• Automatic/manual gearshift selectable modes

Operator Comfort

• Ride comfort enhancements
   - Equalizer bar shoulder pads
     - Increased minor bogie oscillation
     - Larger cab damper mounts
     - New heated/ventilated operators seat with improved suspension & cushioning
• Excellent visibility to the blade and ripper
• All new, ergonomic work environment and ripper levers
• Rearview monitor system
• Electronic height adjuster for steering console

Access

• Rear platform and guard rails
• Heavy-duty steps and large hand rails
• Secondary engine shutdown switch
• Seat belt caution indicator
• Power ladder (Optional)

Reliability & Maintenance

• Robust main and track frame
• Long life powertrain design
• Mesabi radiator*
• Swing-out fan for easy access to radiator core
• Centralized greasing points
• Concentrated sampling points
• Maintenance Service Center for oils and coolants, with quick-fill couplings
• Battery and starter isolator
• Emergency engine stop switches

* Mesabi radiator is a registered trademark of L&M Radiator, Inc.

Information & Communication Technology (ICT)

• Machine monitor with high resolution seven-inch LCD monitor
• Energy Saving Operation

KOMTRAX Plus^®

• Equipment Management Support System
• Reduce maintenance costs and achieve high equipment availability

Parameter

Engine

Model		Komatsu SAA6D170E-7
Type		4-cycle, water-cooled, direct injection
Aspiration		Turbocharged, air-to-air charge air cooler, cooled EGR
Number of cylinders		6
Bore x stroke	170 mm x 170 mm	6.69" x 6.69"
Piston displacement	23.15 ltr	1,413 in³
Governor		Mid-range, electronic
Horsepower:
SAE J1995 - Gross
Forward	474 kW	636 HP
Reverse	578 kW	775 HP
ISO 9249 / SAE J1349* - Net
Forward	455 kW	609 HP
Reverse	558 kW	748 HP
Rated rpm		1800 rpm
Fan drive type		Hydraulic
Lubrication system:
Method		Gear pump, force lubrication
Filter		Full-flow
*Net horsepower at the maximum speed of radiator cooling fan:
Forward	432 kW	580 HP
Reverse	536 kW	719 HP

U.S. EPA Tier 4 Final emission certified.

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 prevent accidental starts.

Gear	Forward	Reverse
1st	3.5 km/h 2.2 mph	4.6 km/h 2.9 mph
2nd	6.8 km/h 4.2 mph	8.9 km/h 5.5 mph
3rd L	8.0 km/h 5.0 mph	9.7 km/h 6.0 mph
3rd	11.8 km/h 7.3 mph	15.8 km/h 9.8 mph

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

Palm Command Control 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

4.2 m

13'9"

Undercarriage

Suspension		Oscillating equalizer bar with shoulder pad and pivot shaft
Track roller frame		Cylindrical, high-tensile-strength steel construction
Rollers and idlers		Lubricated track rollers
Komatsu Bogie (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)	93 mm	3.7"
Shoe width (Standard)	610 mm	24"
Ground contact area	48560 cm²	7,527 in²
Ground pressure (Tractor)	113 kPa / 1.16 kg/cm²	16.4 psi
Number of track rollers		8
Number of carrier rollers		2
Extreme service shoes:	Ground contact area:	Ground** pressure:
610 mm / 24'' Additional weight: 0 lb / 0 kg	48560 cm² 7,527 in²	148.3 kPa / 1.51 kgf/cm² 21.5 psi
710 mm / 28'' Additional weight: 680 kg / 1,500 lb	56520 cm² 8,760 in²	128.6 kPa / 1.31 kgf/cm² 18.6 psi
810 mm / 32'' Additional weight: 1360 kg / 3,000 lb	64480 cm² 9,994 in²	113.7 kPa / 1.16 kgf/cm² 16.5 psi

** Ground pressure based on tractor, strenghtened dual tilt Semi-U dozer blade, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.

Coolant and Lubricant Capacity (refill)

Fuel tank	1200 ltr	317.0 U.S. gal
Coolant	145 ltr	41.5 U.S. gal
Engine	86 ltr	21.1 U.S. gal
Torque converter, transmission, bevel gear, and steering system	150 ltr	39.6 U.S. gal
Final drive (Each side)	65 ltr	16.1 U.S. gal

Operating Weight

Tractor weight Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment.	56340 kg	124,210 lb
Operating weight Including strengthened dual tilt Semi-U dozer blade, giant ripper, 24" extreme service shoes, cab, ROPS (ISO 3471), operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.Including Semi-U tilt dozer, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.	73,410 kg	161,840 lb
Ground pressure	148 kPa / 1.51 kg/cm²	21.5 psi

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 96.7 U.S. gal/min 366 L/min for implement at rated engine rpm.

Relief valve setting (for implement)	29.8 MPa / 304 kg/cm^²	4,322 psi
Control valves:
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 cylinders: Double-acting, piston	Number of cylinders:	Bore:
Blade lift	2	140 mm / 5.5"
Blade Tilt (Single tilt)	1	200 mm / 7.9"
Blade Tilt (Dual tilt)	2	200 mm / 7.9"
Ripper lift	2	200 mm / 7.9"
Ripper tilt	2	180 mm / 7.1"
Hydraulic oil capacity (Refill):
Semi-U dozer or U dozer	130 L	34.3 U.S. gal
Ripper equipment (Additional volume):
Giant ripper	45 L	11.9 U.S. gal
Multi-shank ripper (variable)	45 L	11.9 U.S. gal

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