Komatsu D61EX-23

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Features

New Power and Economy modes: Full power when you need it and Economy mode to save fuel when you don't.

New engine and hydrostatic pump control technology improves operational efficiency and lowers fuel consumption.

SAA6D107E-2 variable geometry turbocharged and aftercooled 6.7 liter diesel engine provides excellent fuel economy. This engine is EPA Tier 4 Interim and EU Stage 3B emissions certified.

Komatsu Variable Geometry Turbocharger (KVGT) uses a hydraulic actuator to provide optimum air flow under all speed and load conditions.

Komatsu Diesel Particulate Filter (KDPF) captures 90% of particulate matter and

provides automatic regeneration that does not interfere with daily operation.

Rear hydraulics (standard)

Rear view monitoring system (standard)

Advanced diagnostic system continuously monitors machine operation and vital systems to identify machine issues and assist with troubleshooting.

Integrated ROPS cab features:
■ Large, quiet, and pressurized cab
■ Excellent visibility with integrated ROPS structure
■ New heated air-ride seat with 15% higher capacity

Improved durability
■ Heavy-plate steel used throughout
■ Dozer frame with full steel castings
■ New HD final drives with triple labrynth seals
■ Komatsu designed and manufactured components

Parallel Link Undercarriage System (PLUS) provides up to double the wear life and lower repair & maintenance costs.

Self-adjusting idler support provides constant and even idler tension, reducing vibration and increasing undercarriage life.

Power Angle Tilt (PAT) dozer with manually adjustable blade pitch increases productivity in a variety of applications.

Complete operator blade control
■ Palm Command Control System (PCCS)
■ Electronic Proportional Control (EPC)
■ Adjustable Quick shift and Variable shift modes
■ New blade angle switch

New more efficient HST with electronic control
■ Customizable Quick shift (3 speed) settings for the operator
■ Variable speed selection (20 speeds)
■ Low speed matching technology (larger displacement pumps/efficient engine speed)

Large color monitor
■ Easy-to-read and use large 7" high-resolution multi-color monitor
■ ECO guidance
■ On-board diagnostics

Enhanced provision for Topcon® machine control (standard) Easy bolt-on finishing kit makes machine Topcon® plug-and-play.

Specifications

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" 2.1 m
     
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 (APROXIMATE)    
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
     
Hydraulic 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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