Versatile enough to accomplish rough dozing to grading, Komatsu’s largest hydrostatic transmission dozer H mode helps operators maintain ground speed while operating under heavy loads. Distinctive slant nose design offers operators exceptional visibility and precision on the job site.
| Model | Komatsu SAA6D114E-6* |
| Type | 4-cycle, water-cooled, direct injection |
| Aspiration | Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR |
| Number of cylinders | 6 |
| Bore x stroke | 114 x 144.5 mm |
| Piston displacement | 8.85 L |
| Governor | All-speed and mid-range, electronic |
| Horsepower: | |
| SAE J1995 - Gross | 179 kW |
| ISO 9249 / SAE J1349 - Net | 177 kW |
| Hydraulic fan at maximum speed | 159 kW |
| Rated rpm | 2 100 rpm |
| Fan drive type | Hydraulic |
| Lubrication system: | |
| Method | Gear pump, force lubrication |
| Filter | Full-flow |
| *EPA Tier 4 Final emissions certified |
| Model | Komatsu SAA6D114E-6* |
| Type | 4-cycle, water-cooled, direct injection |
| Aspiration | Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR |
| Number of cylinders | 6 |
| Bore x stroke | 4.5 x 5.7 in |
| Piston displacement | 540 in³ |
| Governor | All-speed and mid-range, electronic |
| Horsepower: | |
| SAE J1995 - Gross | 240 HP |
| ISO 9249 / SAE J1349 - Net | 237 HP |
| Hydraulic fan at maximum speed | 213 HP |
| Rated rpm | 2,100 rpm |
| Fan drive type | Hydraulic |
| Lubrication system: | |
| Method | Gear pump, force lubrication |
| Filter | Full-flow |
| *EPA Tier 4 Final emissions certified |
Dual-path, hydrostatic transmission provides extensive speed changes up to 11 km/h. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.
| Travel speed (quick shift mode)* |
Forward | Reverse |
| 1st | 0-3.8 kph | 0-4.5 kph |
| 2nd | 0-6.5 kph | 0-7.5 kph |
| 2.5th | 0-8.4 kph | 0-9.3 kph |
| 3rd | 0-11 kph | 0-11 kph |
| Travel speed (variable mode) |
0.8-11 kph | 0.8-11 kph |
*Quick shift speeds are adjustable in the monitor
Dual-path, hydrostatic transmission provides extensive speed changes up to 6.8 mph. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.
| Travel speed (quick shift mode)* |
Forward | Reverse |
| 1st | 0-2.4 mph | 0-2.8 mph |
| 2nd | 0-4 mph | 0-4.7 mph |
| 2.5th | 0-5.2 mph | 0-5.8 mph |
| 3rd | 0-6.8 mph | 0-6.8 mph |
| Travel speed (variable mode) |
0.5-6.8 mph | 0.5-6.8 mph |
*Quick shift speeds are adjustable in the monitor
In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction. Compact in-shoe mount can reduce risk of damage by debris. Bolt-on sprocket for easy displacement.
In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction. Compact in-shoe mount can reduce risk of damage by debris. Bolt-on sprocket for easy displacement.
PCCS joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it backward reverses the machine. Simply tilt the joystick to the left or right to make a turn. Tilting the joystick fully to the left or right activates counter-rotation. HST eliminates steering clutches and brakes, providing smooth, powerful turns. Fully electronic control enables smooth operation. The PCCS utilizes shift buttons to increase and decrease speed.
| Minimum turning radius |
|
| D71EX-24/ D71EXi-24 | 3.1 m |
PCCS joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it backward reverses the machine. Simply tilt the joystick to the left or right to make a turn. Tilting the joystick fully to the left or right activates counter-rotation. HST eliminates steering clutches and brakes, providing smooth, powerful turns. Fully electronic control enables smooth operation. The PCCS utilizes shift buttons to increase and decrease speed.
| Minimum turning radius |
|
| D71EX-24/ D71EXi-24 | 10 ft. 2 in |
Suspension
Oscillating-type with equalizer bar and pivot shafts
Track roller frame
Monocoque, large section, durable construction
Rollers and idlers
Lubricated track rollers
Lubricated tracks
Parallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs. Track tension is adjusted easily with grease gun.
| D71EX-24/ D71EXi-24 |
|
| Number of track rollers (each side) | 8 |
| Type of shoes (standard) | Single grouser |
| Number of shoes (each side) | 45 |
| Grouser height | 65 mm |
| Shoe width (standard) | 610 mm |
| Ground contact area | 39 960 cm2 |
| Ground pressure (with dozer, ROPS cab) (ISO 16754) |
43 kPa |
| Track gauge | 2 230 mm |
| Length of track on ground | 3 275 mm |
Suspension
Oscillating-type with equalizer bar and pivot shafts
Track roller frame
Monocoque, large section, durable construction
Rollers and idlers
Lubricated track rollers
Lubricated tracks
Parallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs. Track tension is adjusted easily with grease gun.
| D71EX-24/ D71EXi-24 |
|
| Number of track rollers (each side) | 8 |
| Type of shoes (standard) | Single grouser |
| Number of shoes (each side) | 45 |
| Grouser height | 2.6 in |
| Shoe width (standard) | 24 in |
| Ground contact area | 43 ft2 |
| Ground pressure (with dozer, ROPS cab) (ISO 16754) |
6.3 psi |
| Track gauge | 7 ft. 3 in |
| Length of track on ground | 10 ft. 8.9 in |
| Coolant | 54.5 L |
| Fuel tank | 439 L |
| Engine oil | 30.5 L |
| Hydraulic ta | 154 L |
| Final drive (each side) | 10 L |
| DEF tank | 20 L |
| Coolant | 14.4 US gal |
| Fuel tank | 116.0 US gal |
| Engine oil | 8.1 US gal |
| Hydraulic ta | 40.7 US gal |
| Final drive (each side) | 2.6 US gal |
| DEF tank | 5.3 US gal |
Tractor weight:
Including ROPS (ISO 3471) cab, U frame for PAT dozer, rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment.
| D71EXi-24 | 21 350 kg |
Operating weight:
Including PAT dozer, ROPS (ISO 3471) cab, operator, standard equipment, rated capacity of lubricant, coolant and full fuel tank.
| D71EX-24 | 22 600 kg |
| D71EXi-24 | 22 700 kg |
Tractor weight:
Including ROPS (ISO 3471) cab, U frame for PAT dozer, rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment.
| D71EXi-24 | 47,069 lbs. |
Operating weight:
Including PAT dozer, ROPS (ISO 3471) cab, operator, standard equipment, rated capacity of lubricant, coolant and full fuel tank.
| D71EX-24 | 49,824 lbs. |
| D71EXi-24 | 50,045 lbs. |
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 remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 235 Lmin at rated engine rpm.
| Relief valve setting | 28.8 MPa 294 kg/cm² |
| Hydraulic cylinders | Double-acting, piston type |
| (Number of cylinders) | Bore |
| Blade lift (2) | 120 mm |
| Blade tilt (1) | 130 mm |
| Blade angle (2) | 110 mm |
| Hydraulic oil capacity (refill): | |
| Power angle tilt dozer | 154 L |
| Control valves: | |
| 3-spool control valve for Power Angle Tilt dozer | |
| Positions: | |
| Blade lift | Raise, hold, lower, and float |
| Blade tilt | Right, hold, and left |
| Blade angle | Right, hold, and left |
| Additional control valve required for ripper | |
| Positions: | |
| Ripper lift | Raise, hold, and lower |
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 remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 62.3 US gpm at rated engine rpm.
| Relief valve setting | 4,177 psi |
| Hydraulic cylinders | Double-acting, piston type |
| (Number of cylinders) | Bore |
| Blade lift (2) | 4.7 in |
| Blade tilt (1) | 5.1 in |
| Blade angle (2) | 4.3 in |
| Hydraulic oil capacity (refill): | |
| Power angle tilt dozer | 40.7 US gal |
| Control valves: | |
| 3-spool control valve for Power Angle Tilt dozer | |
| Positions: | |
| Blade lift | Raise, hold, lower, and float |
| Blade tilt | Right, hold, and left |
| Blade angle | Right, hold, and left |
| Additional control valve required for ripper | |
| Positions: | |
| Ripper lift | Raise, hold, and lower |
ROPS cab*
* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS (ISO 3471) and FOPS (ISO 3449) Level 2 standards
ROPS cab*
* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS (ISO 3471) and FOPS (ISO 3449) Level 2 standards
Multi-shank ripper (for D65EX/WX)
Multi-shank ripper (for D65EX/WX)
