Komatsu D275AX-5

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Features

The pushing power and production of the D275AX-5 comes from the 452 horsepower its Komastu engine produces and the lock-up torque converter. Other features such as hydrostatic steering and K-bogie system give the D275AX-5 the maneuverability to keep up with fast scraper pushing as well as tough ripping. To make the D275AX-5 even more productive, the unique Sigma dozer blade can be mounted to produce 15% more than a conventional blade.

Specifications

Engine    
Model   Komatsu SAA6D140E-5
Type   4-cycle, water-cooled, direct injection
Aspiration   Turbocharged, air-to-air aftercooled, cooled EGR
No. of cylinders   6
Bore x stroke 5.51" x 6.50" 140 mm x 165 mm
Piston displacement 930 in³ 15.24 ltr
Governor   All-speed, electronic
Horsepower:    
SAE J1995 - Gross 452 HP 337 kW
ISO 9249 / SAE J1349 - Net 449 HP 335 kW
Hydraulic fan at maximum speed - Net 410 HP 306 kW
Rated rpm   2000 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 / 3.6 km/h 2.9 mph / 4.7 km/h
2nd 4.2 mph / 6.7 km/h 5.4 mph / 8.7 km/h
3rd 7.0 mph / 11.2 km/h 9.3 mph / 14.9 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 rims are bolt-on for easy replacement.    
     
Steering System    
Palm Command Control System (PCCS) lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to the left to make a left turn.    
Hydrostatic Steering System (HSS) is powered by steering planetary units and an independent hydraulic pump and motor. Counterrotation turns are also available. Wet, multiple-disc, pedal-controlled service brakes are spring-actuated and hydraulically released. Gear shift lock lever also applies parking brake.    
     
Minimum turning radius 12'10 3.9 m
     
Undercarriage    
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 roller frame with a series of K-Bogies whose oscillating motion is cushioned by rubber pads.
Extreme service track shoes   Lubricated tracks. Unique seals help prevent entry of foreign abrasive material into pin-to-bushing clearances to provide extended service life. Track tension is easily adjusted with a grease gun.
Number of shoes (each side)   39
Grouser height:    
Single grouser 3.5'' 88 mm
Shoe width (standard) 24'' 610 mm
Ground contact area 6,580 in² 42456 cm²
Ground pressure (tractor only) 12.7 psi 87.3 kPa / 0.89 kg/cm²
No. of track rollers   7
No. of carrier rollers   2
Extreme service shoes 24" 610 mm
Additional weight 0 lb 0 kg
Ground contact area 6,580 in² 42456 cm²
SIGMADOZER™ Strengthened Dual tilt Ground pressure** 17.2 psi 119 kPa / 1.21 kg/cm²
Semi-U tilt dozer Ground pressure** 16.6 psi 115 kPa / 1.17 kg/cm²
Extreme service shoes 28'' 710 mm
Additional weight 1,260 lb 570 kg
Ground contact area 7,659 in² 49416 cm²
SIGMADOZER™ Strengthened Dual tilt Ground pressure** 15.0 psi 103 kPa / 1.05 kg/cm²
Semi-U tilt dozer Ground pressure** 14.5 psi 100 kPa / 1.02 kg/cm²
Extreme service shoes 30'' 760 mm
Additional weight 1,870 lb 850 kg
Ground contact area 8,199 in² 52896 cm²
SIGMADOZER™ Strengthened Dual tilt Ground pressure** 14.1 psi 97 kPa / 0.99 kg/cm²
Semi-U tilt dozer Ground pressure** 13.7 psi 94 kPa / 0.96 kg/cm²
** Ground pressure based on tractor, cab, ROPS, operator, giant ripper, standard equipment, and shoe and blade shown in the chart.    
     
Coolant and Lubricant Capacity (refill)    
Fuel tank 222 U.S. gal 840 ltr
Coolant 26.4 U.S. gal 100 ltr
Engine 13.7 U.S. gal 52.0 ltr
Torque converter, transmission, bevel gear, and steering system 23.8 U.S. gal 90 ltr
Final drive (each side) 10.6 U.S. gal 40 ltr
     
Operating Weight    
Tractor weight - Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. 83,070 lb 37680 kg
Operating weight - Including Strengthened Dual tilt SIGMADOZER™, giant ripper, steel cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank. 113,600 lb 51530 kg
Ground pressure 17.2 psi 119 kPa / 1.21 kg/cm²
     
Hydraulic System    
Closed-center Load Sensing System (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.    
Hydraulic control units:   All spool valves externally mounted beside the hydraulic tank. Piston type hydraulic pump with capacity (discharge flow) of 230 ltr/min / 60.8 U.S. gal/min at rated engine rpm.
Relief valve setting 3,980 psi 27.5 MPa / 280 kg/cm²
Control valves:   Spool control valves for SIGMADOZER™, Semi-U tilt and Full-U tilt dozer
Positions:    
Blade lift   Raise, hold, lower, and float.
Blade tilt   Right, hold, and left.
Note:   Additional control valve required for variable digging angle multi-shank ripper and giant ripper.
Positions:    
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 4.72'' 120 mm
Blade tilt / 1(Single tilt), 2(Dual tilt) 7.09'' 180 mm
Ripper lift / 2 7.09'' 180 mm
Ripper tilt / 2 6.30'' 160 mm
Hydraulic oil capacity (refill):    
SIGMADOZER™, Semi-U dozer, or U dozer 34.3 U.S. gal 130 ltr
Ripper equipment (additional volume):    
Giant ripper 10.0 U.S. gal 38 ltr
Multi-shank ripper 10.0 U.S. gal 38 ltr

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