Komatsu Dozers D51EXi-22
D51EXi-22 Crawler Dozer
iMC (intelligent machine control) machines have the following advantages over dozers with external grade control systems.
Innovative
Automated operation from rough dozing to finish grade.
Intelligent
New dozing mode, load control performance features.
Integrated
Standard factory installed integrated system.
No Cables
No coiled cables between machine and blade.
No Climbing
GNSS antenna and mast removed from blade.
No Connections
No daily connections required between machine and blade.
| Model | Komatsu SAA6D107E-1* | |
| Type | 4-cycle, water-cooled, direct injection | |
| Aspiration | Turbocharged, air-to-air aftercooled | |
| Number of cylinders | 6 | |
| Bore x stroke | 4.21" x 4.88" | 107 mm x 124 mm |
| Piston displacement | 408 in³ | 6.69 ltr |
| Governor | All-speed, electronic | |
| Horsepower | ||
| SAE J1995 - Gross | 133 HP | 99 kW |
| ISO 9249 / SAE J1349 - Net | 130 HP | 97 kW |
| Rated rpm | 2200 rpm | |
| Fan drive type | Hydraulic(reversible) | |
| Lubrication system: | ||
| Method | Gear pump, force lubrication | |
| Filter | Full-flow | |
| *EPA Tier 3 emissions certified |
| Dual-path, hydrostatic transmission provides infinite speed changes up to 9.0 km/h 5.6 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 | 0–2.1 mph 0–3.4 km/h |
0–2.5 mph 0–4.1 km/h |
| 2nd | 0–3.5 mph 0–5.6 km/h |
0–4.0 mph 0–6.5 km/h |
| 3rd | 0–5.6 mph 0–9.0 km/h |
0–5.6 mph 0–9.0 km/h |
| Travel speed (variable mode) | Forward | Reverse |
| 0–5.6 mph 0–9.0 km/h |
0–5.6 mph 0–9.0 km/h |
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| Two-stage planetary gear integrated into axial piston travel motors. Compact in-shoe mount reduces risk of damage by debris. Bolt-on sprocket segments for easy replacement. |
| Palm Command Control System (PCCS) joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it rearward 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. Hydrostatic Transmission (HST) eliminates steering clutches and brakes, providing smooth powerful turns. Fully electronic control enables smooth control. The PCCS utilizes shift buttons to increase and decrease speed.
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| Minimum turning radius* | 7'10" | 2.39 m |
| As measured by track marks on the ground at pivot turn. | ||
| Suspension | Oscillating equalizer bar and pivot shaft | |
| Track roller frame | Monocoque, large section, durable construction | |
| Rollers and idlers | Lubricated track rollers | |
| Lubricated tracks: | Unique seals help prevent entry of foreign abrasive material into pin to bushing clearances for long service life. | |
| Parallel Link Undercarriage System (PLUS) | Increased component size and strength, and rotating bushing design provide extended wear life and lower maintenance. | |
| Number of track rollers (each side) | 7 | |
| Type of shoes (standard) | Single grouser PLUS | |
| Number of shoes (each side) | 44 | |
| Grouser height | 2.2" | 56 mm |
| Shoe width (standard) | 22" | 560 mm |
| Ground contact area | 4,752 in² | 30643 cm² |
| Ground pressure (with dozer, ROPS cab) |
5.76 psi | 0.41 kgf/cm² / 39.7 kPa |
| Track gauge | 5'10" | 1790 mm |
| Length of track on ground | 9'0" | 2736 mm |
| Coolant | 9.3 U.S. gal | 35 ltr |
| Fuel tank | 71.3 U.S. gal | 270 ltr |
| Engine oil | 5.3 U.S. gal | 20 ltr |
| Hydraulic tank | 16.6 U.S. gal | 63 ltr |
| Final drive (each side) | 1.1 U.S. ga | 4.0 ltr |
| Tractor weight: | Including ROPS cab, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. | |
| D51EX-22 | 24,074 lb | 10920 kg |
| Operating weight: | Including power angle tilt dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank. | |
| D51EX-22 | 27,381 lb | 12420 kg |
| 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 99 ltr/min 26.2 U.S. gal/min at rated engine rpm. |
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| Relief valve setting | 3,983 psi | 27.4 MPa / 280 kg/cm² |
| Hydraulic cylinders | Double-acting, piston type | |
| Number of cylinders: | Bore | Bore |
| Blade lift / 2 | 3.54" | 90 mm |
| Blade tilt / 1 | 3.94" | 100 mm |
| Blade angle / 2 | 3.54" | 90 mm |
| Hydraulic oil capacity (refilling): | ||
| Power angle tilt dozer | 16.6 U.S. gal l | 63 ltr |
| 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 | |
