• 48,444 - 51,960 lbs Operating Weight
  • 217 @1950 rpm Horsepower
  • 4.8 yd³ Blade Capacity


The long track, low ground pressure D65PX-18 has hydrostatic steering (HSS) for smooth, powerful turns and offers better flotation in soft or wet conditions than the EX or WX models. The Tier 4 Final Komatsu engine powers an automatic transmission and lock-up torque converter system that maximizes gear-to-load efficiency for low fuel consumption. Left and right palm command control joysticks afford operators a relaxed posture, superb fine control and all the tools needed to maximize productivity. Other -18 model upgrades include more horsepower, better shift smoothness and engine response, and a standard, high-debris climate-control package.

D65PX-18 Walkaround  >


Air Suspension Seat

New operator seat is equipped with lumbar support, tilting adjust function and electric heater. It is easy to adjust to the operator's shape and various working conditions and provides for comfortable operation. Also standard seat heat makes it possible to work comfortably in the winter.

Auto Idle Shutdown

Komatsu auto idle shutdown automatically shuts the engine down after idling for a set period of time to reduce unnecessary fuel consumption and exhaust emissions. The amount of time before the engine is shutdown can be easily programmed from 5 to 60 minutes.

Automatic shift mode

Select for all general dozing. When a load is applied, the transmission automatically shifts down, and when the load is off, it automatically shifts up to a set maximum gear speed. This mode economizes both fuel and production further when the torque converter lockup mechanism is actuated according to load, providing a one-to-one drive.

Automatic Transmission with Lockup Torque Converter

A significant reduction in fuel consumption and greater power train efficiency are achieved by the automatic transmission and lockup torque converter. The automatic transmission selects the optimal gear range depending on the working conditions and load placed on the machine. This means the machine is always operating at maximum efficiency. The lockup mechanism of the torque converter is automatically actuated to transfer engine power directly to the transmission in travelling and usual dozing speed ranges. Locking up the torque converter results in 10% improved drive train efficiency.

ECO Guidance

In order to support to optimum operation, the following 5 recommendations are displayed to improve fuel saving operation:

    1) Avoid Excessive Engine Idling

    2) Use Economy Mode to Save Fuel

    3) Avoid Hydraulic Relief Pressure

    4) Avoid Overload

    5) Use Automatic Shift Mode


The operator can access the ECO guidance menu to check the Operation Records, Eco Guidance Records, and Average Fuel Consumption logs.

Enhanced Transmission Shifting

Select automatic or manual gearshift modes to suit the work at hand, thanks to Tier 4 Final improvements made to the shifting logic. The D65-18 machine now offers faster, smoother shifting in automatic mode. The ability to disable the auto downshift feature from the monitor in the manual shift mode empowers operators who prefer blade load control and shifting from a true manual mode. Operators now have full downshift control from the manual mode.

Hydrostatic Steering System (HSS)—Smooth, Powerful Turning

The engine power is transmitted to both tracks without power interruption on the inside track for smooth, powerful turns. Counter-rotation while in neutral is available for minimum turning radius providing excellent maneuverability.

Innovative SIGMADOZER®

Based on a completely new digging theory, SIGMADOZER® dramatically improves dozing performance and increases productivity. A new frontal design concept adopted for digging and rolling up at the center of the blade increases soil holding capacity and simultaneously reduces sideway spillage. Reduced digging resistance produces smoother flow of material, enabling the dozing of larger quantities of material with less power. In addition, adoption of a new blade linkage system holds the blade closer to the tractor for improved visibility, enhanced digging force and reduced lateral sway of the blade. This is the next generation of dozer blades.

Integrated ROPS Cab

The D65EX/PX/WX-18 has a strong integrated ROPS cab. High rigidity and superb sealing performance sharply reduce noise and vibration for the operator and helps prevent dust from entering the cab. This provides the operator a comfortable working environment. In addition, side visibility is increased because additional external ROPS structure and posts are not required. Outstanding visibility has been achieved.

Manual shift mode

The mode for dozing and ripping rough ground. When enabled, the transmission automatically shifts down when a high load is encountered, but does not shift up when the load is off. The operator can specify whether the auto shift down function is enabled or disabled in manual gearshift mode by selection in the monitor.

Palm Command Electronic Controlled Travel Control Joystick

Palm command travel joystick provides the operator with a relaxed posture and superb fine control without operator fatigue. Transmission gear shifting is simplified with thumb push buttons.

Power Angle Power Tilt Dozer

A power angle tilt dozer blade with highly durable boxstructure frame is available as an option. This blade is available for the EX, WX and PX machines. The hydraulic tilt and angle function expands versatility and productivity in a variety of applications.

Rear View Monitoring System

On the large LCD color monitor, the operator can view, through one camera, areas directly behind the machine. This camera can be synchronized with reverse operation.

Selectable Working Mode

Working mode P is the mode aiming for powerful operation and maximum production and mode E for general dozing applications with adequate speed and power while saving energy. For CO2 reduction and energy saving, the monitor panel allows for switching the working mode with ease, depending on the work at hand.

P mode (Power mode)
With P mode, the engine outputs its full power, allowing the machine to perform the work requiring large production, heavy-load work, and uphill work.

E mode (Power mode)
With E mode, the engine outputs enough power for the work without delivering unnecessary power. This mode allows for energy saving operation and is suitable for the work on a ground where the machine may cause shoe slip and the work not requiring large power such as downhill dozing, leveling and light-load work.

Standard High Debris Climate Control Package

The D65-18 offers improved heating and cooling performance in high debris applications. A wide core A/C condenser, cab air filter precleaner, and relocated coolant overflow tank are now standard to ensure reliable HVAC performance in high debris applications.



Komatsu SAA6D114E-6*
4-cycle, water-cooled, direct injection
Komatsu variable geometry turbocharged, air-to-air aftercooled
Number of cylinders
Bore x stroke 114 mm x 144.5 mm 4.49" x 5.69"
Piston displacement 8.85 ltr 540 in³
All-speed and mid-range, electronic

SAE J1995 - Gross 164 kW 220 HP
ISO 9249 / SAE J1349 - Net 162 kW 217 HP
Rated rpm
1950 rpm
Fan drive type
Lubrication system:

Gear pump, force lubrication
*EPA Tier 4 Final emissions certified

Final Drive

Double-reduction final drive of spur and planetary gear sets to increase tractive effort and reduce gear tooth stresses for long final drive life. Segmented sprocket teeth are bolt-on for easy replacement.

Hydraulic System

Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control units:
All spool valves externally mounted beside the hydraulic tank. Piston type hydraulic pump with capacity (discharge flow) of 248 ltr/min 65.5 U.S. gal/min at rated engine rpm.

Relief valve setting 27.9 MPa / 285 kg/cm² 4,050 psi
Control valves:

Spool control valves for SIGMADOZER® or straight tilt dozer


Blade lift
Raise, hold, lower, and float
Blade tilt
Right, hold, and left
Rear attachment
Raise, hold, and lower

Service Refill Capacities

Fuel tank 415 ltr 109.6 U.S. gal
DEF tank 23.5 ltr
6.2 U.S. gal
Coolant 49 ltr 12.9 U.S. gal
Engine 30.5 ltr 8.1 U.S. gal
Torque converter, transmission, bevel gear, and steering system 48 ltr 12.7 U.S. gal
Final drive (each side):
D65EX-18 non PAT
16.5 ltr 4.4 U.S. gal
D65EX-18 with PAT 22 ltr 5.8 U.S. gal
D65PX-18 22 ltr 5.8 U.S. gal
D65WX-18 22 ltr 5.8 U.S. gal

Steering System

Palm Command Control System (PCCS) lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to left to make a left turn. Tilt it to the right for a right turn.

Hydrostatic Steering System (HSS) is powered by steering planetary units and a hydraulic pump and motor. Counterrotation turns are also available. Wet, multiple-disc, pedalcontrolled service brakes are spring-actuated and hydraulically released. Gear shift lock lever also applies parking brake.

Minimum turning radius:

D65EX-18 6'3" 1.9 m
D65EX-18 with PAT 6'7" 2.0 m
D65PX-18 7'3" 2.2 m
D65WX-18 6'11" 2.1 m

TORQFLOW Transmission

Komatsu TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 2-phase, torque converter with lockup clutch, and a planetary gear, multiple-disc clutch transmission which is electronically controlled, hydraulically actuated and force-lubricated for optimum heat dissipation. Shift lock lever and neutral safety switch.

Travel speed Forward Reverse
1st 3.7 km/h
2.3 mph
4.5 km/h
2.8 mph
2nd 5.6 km/h
3.5 mph
6.7 km/h
4.2 mph
3rdL 7.3 km/h
4.5 mph
8.7 km/h
5.4 mph
3rd 11.3 km/h
7.0 mph
13.6 km/h
8.5 mph


Suspension Oscillating equalizer bar and pivot shaft
Track roller frame Monocoque, large section, durable construction
Rollers and idlers Lubricated
Track shoes 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.


  • Air cleaner, double element with dust indicator
  • Alternator, 90 ampere/24V
  • Auto idle shutdown function
  • Backup alarm
  • Batteries, 200 Ah/2 x 12V
  • Battery disconnect switch
  • Blade lift cylinders
  • Color monitor, LCD 
  • Decelerator pedal
  • Engine hood
  • Engine intake centrifugal precleaner
  • Engine, gull-wing side covers
  • Engine shutdown secondary switch
  • Fenders
  • Front pull hook
  • High mount foot rests
  • Horn, warning
  • Hydraulic driven radiator cooling fan with reverse clean mode
  • Hydraulics for rear equipment
  • KOMTRAX® Level 5
  • Komatsu Diesel Particulate Filter (KDPF)
  • Komatsu Variable Geometry Turbocharger (KVGT)
  • Locks, filler caps and covers
  • Muffler with curved exhaust pipe
  • Oil pressure check ports for power train
  • Operator ID function
  • PM service connector
  • Radiator mask, heavy-duty, hinged, perorated
  • Radiator reserve tank
  • Rear cover
  • ROPS cab**
  • 75 dB operator ear noise level
  • Air conditioner
  •  Cab accessories
    --12V power supply (2 ports)

    --Cup holder

    --Rearview mirror

    --Rear view monitoring (1 camera)

    --AM/FM Radio w/remote AUX plug (3.5 mm)
  • Shovel holder
  • Work lights
    --2 front, hood mounted
    --2 front, cab mounted

    --1 rear, left fender mounted
    --2 rear, cab mounted
  • Seat, air suspension, fabric, heated low back, rotates 12.5° to right, headrest
  • Seat belt, 76 mm 3", retractable
  • Seat belt indicator
  • Sealed electrical connectors
  • Secondary engine shutoff switch
  • Starting motor, 11.0 kW/24V
  • Steering system: Hydrostatic Steering System (HSS)
  • Torque converter with auto lock-up
  • Track roller guards, center and end sections
  • Track shoe assembly
  • Heavy-Duty lubricated rotary bushing (PLUS) track
  • 560 mm 22" single grouser shoe (EX with PAT) 
  • 610 mm 24" single grouser shoe (EX with outside mount blade) 
  • 760 mm 30" single grouser shoe (WX with outside mount blade)
  • 760 mm 30" single grouser shoe (PX, WX with PAT) 
  • 915 mm 36" single grouser shoe (PX with outside mount blade)
  • Transmission with auto/manual shift modes
  • Underguards, heavy duty
  • Hinged belly pan
  • Transmission
  • Water separator
  • Wide core cooling package 

* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets OSHA/MSHA ROPS and FOPS Level 2 standards


  • Dozer assembly
  • Drawbar, long type
  • Hitch
  • Rear counterweight 850 kg 1,870 lb
  • Straight tilt frame for use with allied blades
  • Topcon® Plug-N-Play bolt-on finishing kit
  • Track roller guard, full length
  • 560 mm 22" single grouser HD (EX)
  • 760 mm 30" extreme service shoes
  • 915 mm 36" extreme service shoes