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Komatsu Dozers D61EX-23

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.

Engine
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
Hydrostatic transmission
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.
FINAL DRIVE
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.
STEERING SYSTEM
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.
Minimum turning radius (as measured by track marks on the ground at pivot turn.) 83"
Undercarriage
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
SERVICE REFILL CAPACITIES
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
Operating Weight (approximate)
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
HYDRALIC SYSTEM
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.
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

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