Komatsu Dozers D61EX-23
D61EX-23 Crawler Dozer
Hydrostatic drive gives the Komatsu Dozers D61EX-23 operator incredible control with tremendous pushing power. The super slant nose design gives the operator the balance he needs for high precision grading. Komatsu's Tier 4 interim solution lets the operator work during regeneration. To make the operator more comfortable and productive, a new air suspension heavy duty heated seat is standard.
| Model | Komatsu SAA6D107E-2* | |
| Type | 4-cycle, water-cooled, direct injection | |
| Aspiration | Komatsu variable geometry 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 and mid-range, electronic | |
| Horsepower | ||
| SAE J1995 - Gross | 170 HP | 127 kW |
| (ISO 14396 | 169 HP | 126 kW |
| ISO 9249 / SAE J1349 - Net | 168 HP | 125 kW |
| Rated rpm | 2200 rpm | |
| Fan drive type | Hydraulic | |
| Lubrication system: | ||
| Method | Gear pump, force lubricationn | |
| Filter | Full-flow |
| 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 | 0-3.4 km/h 0-2.1 mph | 0-4.1 km/h 0-2.5 mph |
| 2nd | 0-5.6 km/h 0-3.5 mph | 0-6.5 km/h 0-4.0 mph |
| 3rd | 0-9.0 km/h 0-5.6 mph | 0-9.0 km/h 0-5.6 mph |
| Travel speed (variable mode) | 0-9.0 km/h 0-5.6 mph | 0-9.0 km/h 0-5.6 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 reduces risk of damaged by debris. Bolt-on sprocket teeth for easy displacement. |
| 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) provides smooth powerful turns. Fully electronic control enables smooth control that can be adjusted in the monitor. The PCCS utilizes shift buttons to increase and decrease speed. |
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| Minimum turning radius (as measured by track marks on the ground at pivot turn.) | 83" | |
| 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 easily adjusted with grease gun. |
| Number of track rollers (each side) | 8 | |
| Type of shoes (standard) | Single grouser | |
| Number of shoes (each side) | 46 | |
| Grouser height | 2.3" | 57.5 mm |
| Shoe width (standard | 24" | 600 mm |
| Ground contact area | 4,836 in² | 31200 cm² |
| Ground pressure (with dozer, ROPS canopy): |
8.08 psi | 55.7 kPa 0.57 kgf/cm² |
| Track gauge | 6'3" | 1900 mm |
| Length of track on ground | 10'5" | 3161 mm |
| Coolant | 11.9 U.S. gal | 45 ltr |
| Fuel tank | 98.3 U.S. gal | 372 ltr |
| Engine oil | 7.2 U.S. gal | 27 ltr |
| Hydraulic tank | 26.7 U.S. gal | 101 ltr |
| Final drive (each side) | 2.2 U.S. gal | 8.1 ltr |
| Tractor weight | Including ROPS cab, U frame for power angle tilt dozer, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. | |
| D61EX-23 | 36,999 lb | 16780 kg |
| Operating weight: | Including Power Angle Tilt dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, hydraulic control unit, coolant, and full fuel tank. | |
| D61EX-23 | 39,099 lb | 17735 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 171 ltr/min / 45 U.S. gal/min at rated engine rpm. |
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| Relief valve setting | 3,974 psi | 280 kg/cm² 27.4MPa |
| Hydraulic cylinders | 3,974 | |
| Hydraulic cylinders: | Number of cylinders | Bore |
| Blade lift | 2 | 4" 100 mm |
| Blade tilt | 1 | 5" 120 mm |
| Blade angle | 2 | 4" 100 mm |
| Hydraulic oil capacity (refilling): | ||
| Power angle tilt dozer | 26.7 U.S. gal | 101 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 | |
