Komatsu Bulldozer D85EX-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

METHOD OF RELEASING PRESSURE IN HYDRAULIC CIRCUIT

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?

Accumulator disposed of properly with gas released?

Accumulator replaced by Komatsu distributor if performance dropped?

Water pump checked for oil and coolant leakage, or clogging of the drain hole?

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

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.

Prepare a socket wrench and filter wrench.

Covers at the bottom left at the front of the machine and on the side face removed?

Drain plug (P) loosened and oil drained?

Observations on the drained oil

Filter cartridge (1) removed using a filter wrench?

New filter cartridge filled with clean oil and installed?

Oil added through oil filler (F) until the oil level is between the H and L marks on the dipstick (G)?