Komatsu D51EXi-22 » General Equipment & Supplies, Inc.

Komatsu D51EXi-22

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Standard Intelligent Machine Control
Standard factory installed integrated 3D GNSS intelligent machine control system.

Improved Machine Control
Up to 9% more efficient dozer operation than comparable aftermarket machine control systems in start to finish grading tests.

Factory Installed Machine Control Components
Machine control components are factory installed and designed as an integral part of the base machine for improved durability.

Komatsu Quality
Machine control components and system validated to Komatsu’s rigorous quality & durability standards.

Industry Standard Compatibility
Machine control system makes use of common industry design data file norms and supports typical base station communication.

Simple Operator Interface
Simple touch screen control box with multi-color customizable display.

3D GNSS Machine Control Standard
All on-machine components standard including control box, GNSS receiver/ radio, GNSS antenna, and enhanced inertial measurement unit sensor.

Finish Grade Performance
Enhanced sensor package and intelligent logic provides for finish grade accuracy in an integrated system without traditional blade mounted sensors.

Stroke Sensing Hydraulic Cylinders
Robust stroke sensing hydraulic cylinders employee proven Komatsu sensor technologies for accurate finish grade performance.

Enhanced Inertial Measurement Unit (IMU+)
Chassis mounted enhanced inertial measurement unit (IMU+) and intelligent logic provides for finish grade accuracy without blade mounted sensors.

Cab Top GNSS Antenna
No blade mounted GPS antennas, cables to worry about damaging with cab top GNSS antenna.

Automatic Dozing From Start To Finish
Load control intelligence controls blade elevation to improve productivity and minimize track slip by adjusting blade load. 1.0' from grade or 0.1' from grade – you can run in auto mode.

Intelligent Dozing Mode Settings
Operators are able to select between 4 distinct machine control operating modes to optimize performance to the application whether cutting, spreading, or other.

Operator Selectable Load Settings
Machine control load settings can be adjusted between presets to tailor response to material conditions.


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
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
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 0–2.1 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    
Final Drive    
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  
Service Refill Capacities    
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
Operating Weight    
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
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 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.    
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.    
Ripper lift   Raise, hold and lower