Features
High productivity
The high-power engine, highly efficient power train, large drawbar pull provided by the conventional undercarriage, and the high performance work equipment provide high productivity.
• Large capacity blade
Large capacity blade, powerful digging force, large up-and-down movement of the blade, and high strength provided by high tensile steel.
• Uniquely designed ripper
The unique linkage design enables the ripper point to draw an ideal locus during cylinder tilting for effective excavation of embedded rocks.
• Automatic lock-up torque converter
When the lock-up clutch is engaged, the pump and the turbine are virtually connected and the internal power loss of the torque converter is minimized. (D275AX, D375A and D475A)
• Resilient Equalized Undercarriage (REU)
This highly advanced undercarriage system utilizes an X-shape bogie structure with an independent see-saw movement for the track rollers. This allows the shoes to always follow the contour of the ground for excellent traction. The bogies contact the track frame through rubber shock absorber reduces vibration and shock. (D155A-5, D155AX and D575A)
Dependable and high-performance components
• Komatsu's diesel engine delivers a strong horsepower and has a direct-injection system for fuel savings and cleaner exhaust.
• The TORQFLOW transmission not only ensures smooth and responsive power shifting, but also makes instant speed and directional changes by a single lever.
• The HYDROSHIFT transmission ensures not only efficient power transmitting ability for reduced fuel costs, but also a single-lever speed control and F/R directional changes for easy operation. (D21, D31-20, D37-5 and D41)
• Wet, multiple-disc type steering clutches and brakes ensure long service life and eliminate troublesome brake-lining adjustments. (D41, D65, D155A-5, D275A, D375A, D475A and D575A)
• Double reduction final drives feature a large reduction ratio and minimize shocks to the power train components and extend the life of components. [Except D20/D21, D31-20, D37-5 and D41]
• Lubricated track links: Since the clearance between the link pin and bushing is lubricated, wear and pitch extensions are minimized for extended service life.
• Unique dust seals prevent dust from entering into pin-to-bushing clearance for extended service.
• Floating seals in the idlers and rollers keep dirt out and lubricant in for durable operation.
Specifications
* : Operating weight includes lubricants, coolant, full fuel tank, operator and standard equipment, without blade, rear attachment, ROPS and canopy.
** : Without canopy, exhaust pipe, pre-cleaner cap or other easily removed encumbrances.
Specifications
(Low Ground Pressure Tractors)
* : Operating weight includes lubricants, coolant, full fuel tank, operator and standard equipment, without blade, rear attachment, ROPS and canopy.
** : With inside power angle-tiltdozer.
*** : Without canopy, exhaust pipe, pre-cleaner cap or other easily removed encumbrances.
Drawbar Pull vs. Travel Speed
D61EX-12, D61EX-12 LT
D65E-12
D65EX-12, D65EX-12 LT
D85ESS-12, D85ESS-12A
D85A-21, D85E-21
D85A-21B
D155A-5
NOTE: THE DRAWBAR PULL AND TRAVEL SPEED MAY BE SUBJECT TO CHANGE DEPENDING ON THE GROUND CONDITIONS AND MACHINE WEIGHT.
Ground Pressure
Definition: Ground pressure = tractor machine operating weight / total ground contact area where; total ground contact area = length of track on ground × shoe width × 2.
Single grouser shoe
* : Standard shoe
*** : With inside power angle-tilt dozer
Single grouser shoe
* : Standard shoe
** : See the classification of shoe application
Shoe Application
Classification of the applications:
NOTE: Select the proper shoe width for your customers, by taking the limitations described above into consideration, (especially on wide shoes "B" and "C"). Select the narrowest possible shoes, depending on the flotation and ground pressure of the machines. If the shoe is too wide, the load on the track shoe increases and results in bends in the shoes, cracks in the links, breakage and slipping out of the pins and loosening of the bolts.
Shoe Selection
SINGLE-GROUSER SHOE
• Provides large drawbar pull required for angledozers and straightdozers.
• Designed for rugged operations. Has extra thick grouser (called "extreme service shoe") for excellent resistance to wear and bend.
TRIPLE-GROUSER SHOE
• Mainly used for dozer shovels. Equipped with three grousers.
• Provides lower traction due to its low grousers.
Operates efficiently on soft ground and during cargo handling in ships.
• Low in turning resistance - high in maneuverability.
SNOW SHOE
• Has projections and a stepped grouser to prevent side slipping.
• Designed with a hole in the center to prevent falling-off of the track and to protect the undercarriage from damage.
SWAMP SHOE
• Has large shoe width for wider ground contact area.
• Komatsu’s exclusive circularly curved shoe ensures low sinking rate and greater traction.
Prevents soil from sticking to shoe for excellent traction.
ROCKBED SHOE
• Reinforced to prevent breakage and bend.
• Features tough manganese steel for added durability, wear-resistance and economy.
Provided with ribs to prevent side slipping.
SCORIA DISPOSAL SHOE
• Made of low manganese steel to prevent
deterioration by heat. Excellent durability.
FLAT SHOE
• Flat - without any grouser. Has less traction but provides outstanding resistance to wear bend and breakage.
• Ideal for operation on pavements and in ships’ holds.
Features lower turning resistance
Upper Attachment
* : With ROPS brackets, except D65-12 and D85ESS-2A
** : With inside power angle-tilt dozer
*** : Two-pole type
*4 : ROPS canopy and steel cab