Komatsu D51EXi-22 Bulldozer
Feature
Rated rpm : 2200 rpm
Operating Weight : 27,381 lb 12420 kg
Rated rpm : 2200 rpm
Operating Weight : 27,381 lb 12420 kg
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KOMATSU |
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Name : KOMATSU
Service Tel : (8621)-6841-4567
E-mail :
Web Site : https://home.komatsu/en/
Address :
No blade mounted GNSS antenna(s), cables to worry about damaging with cab top GNSS antenna. Reduced risk of theft due to low visibility as viewed from ground level.
Stroke Sensing Hydraulic Cylinders
Robust stroke sensing hydraulic cylinders employ proven Komatsu sensor technologies for accurate finish grade performance. Stroke sensing angle cylinder allows machine control system to know the angle of the blade.
The HST controller monitors engine output and work equipment/travel load. It controls HST pump and motor displacement to provide the optimum speed and drawbar pull. Power to both tracks during turns and counter-rotation makes the D51 extremely maneuverable.
The D51 is equipped with a Komatsu-designed Hydrostatic Transmission (HST) that allows Quick-Shift or variable speed selection. The HST consists of dual-path closed-circuits with two variable displacement piston pumps and two variable displacement travel motors. Hydrostatic steering eliminates steering clutches and brakes, providing smooth powerful turns. Fully electronic control provides full automatic shifting and enables smooth control. Engine speed is controlled using an electronic fuel control dial.
Blade control joystick uses the EPC valve and joystick. EPC control combined with the highly reliable Komatsu hydraulic system enables superb fine control. A switch is used to angle the PAT blade. A button to activate float is also provided.
With CLSS hydraulics, blade lever stroke is directly proportional to blade speed, regardless of the load and travel speed. This results in superb fine controllability.
The D51i-22 utilizes a swing-up fan with a gas strut-assisted lift locking system to provide easy access to the (side-by-side) radiator, oil cooler, and charge air cooler. The swing-up feature makes it easier to access cooling cores. The hydraulic fan has a “cleaning” mode. The fan rotates in the reverse direction and helps to clear off objects in front of the cooling areas. The fan is protected by thick steel louvers and an additional fan screen for added durability.
| 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 |
| Hydraulic fan at maximum speed - Net | 120 HP | 90 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 |
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.
| 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. gal | 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. | ||
| 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 | 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 |
