Komatsu Bulldozer D85PX-15

Warning: The oil is at high temperature immediately after operations, so wait for the temperature to go down before starting the operation.

The undercover is heavy. Do not go directly under the cover when opening or closing it.

Prepare the following. Refill capacity: 60 liters (15.85 US gal)

Remove drain cover (1) at the bottom Right of the power train case, then loosen drain plug (P) and drain the oil.

After draining the oil, tighten drain plug (P).

Remove inspection cover (2) in the undercover at the bottom rear of the machine.

Remove drain plug (P2) in the strainer cover, and drain the oil (approx. 4 liters (1.06 US gal)) collected inside the piping.

Loosen mounting bolt (5) of the power train strainer, then remove cover (6).

Remove spring (7), then remove strainer (8).

CHANGE OIL IN HYDRAULIC TANK, REPLACE HYDRAULIC OIL FILTER ELEMENT, CLEAN HYDRAULIC TANK STRAINER

Steps to change oil in hydraulic tank

CHANGE OIL IN DAMPER CASE, CLEAN DAMPER BREATHER

Steps to change oil in damper case

CHECK PIVOT BEARING OIL LEVEL, ADD OIL

Steps to check pivot bearing oil level

CHECKING CHARGE PRESSURE OF NITROGEN GAS IN ACCUMULATOR (FOR CONTROL CIRCUIT)

Steps to check charge pressure of nitrogen gas in accumulator

Lower the work equipment to the ground, then stop the engine.

Using a grease pump, pump in grease through the grease fittings shown by arrows.

After greasing, wipe off any old grease that was pushed out.

CHECK ALTERNATOR DRIVE BELT TENSION, ADJUST

Check the standard deflection for the drive belt is approx.13 to 16 mm (0.51 to 0.63 in) when pressed by thumb (approx 99.1N {10 kg}) at a point midway between the drive pulley and alternator pulley.

Loosen bolts (1) and nuts (2), (4), and (5), then turn nut (4) and adjust the belt tension.

After adjusting, tighten bolts and nuts (2), (4), and (5), to secure alternator (3) in position.

REPLACE ACCUMULATOR (FOR CONTROL CIRCUIT)

Accumulator replaced without disassembly, exposure to flame, puncturing, welding, or impact?

WARNING: If operations are continued after the performance of the accumulator has dropped, it will be impossible to release the remaining pressure in the hydraulic circuit if there should be a failure on the machine. Please ask your Komatsu distributor to replace the accumulator.

CHECK WATER PUMP: No oil and coolant leakage, or clogging of the drain hole?

CHECK INJECTOR: See Section 'B REGULATION AREA (PAGE 4-18)'.

REPLACE INJECTOR ASSEMBLY: See Section 'A REGULATION AREA (PAGE 4-18)'.

CHECKING FOR LOOSENESS OF HIGH-PRESSURE CLAMP, HARDENING OF RUBBER: No loose bolts or hardening of rubber parts at clamps (1) to (10)?

NOTICE: If the engine continues to be used when there are loose bolts, hardened rubber, or missing parts, there is danger of damage or breakage occurring due to vibration and wear at the connections of high-pressure piping. Always check that the proper high-pressure piping clamps are correctly installed.

CHECKING FOR MISSING FUEL SPRAY PREVENTION CAP, HARDENING OF RUBBER: No missing caps or loose bolts, and the rubber has not hardened?

WARNING: Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns. Wait for the oil temperature to go down before performing this operation.

Refill capacity: 38 liters (10.04 US gal)

Prepare a socket wrench and filter wrench.

Remove the covers at the bottom left at the front of the machine and on the side face, and put a container directly underneath to catch the drained oil.

Loosen drain plug (P) (with a slit) slowly to avoid getting oil on yourself, and drain the oil.

Check the drained oil, if there is excessive metal particles or foreign material, contact your Komatsu distributor.

Using a filter wrench, turn filter cartridge (1) counterclockwise to remove it.

Clean the filter holder, fill the new filter cartridge with clean oil, coat the thread and packing portion of the new filter cartridge with oil (or coat thinly with grease), then install.