Komatsu Bulldozer D85PX-15

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.

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

WARNING: Immediately after the engine is stopped, the oil and parts are at high temperature, and may cause burns. To prevent this, wait for the temperature to go down before starting the operation.

Before opening the filter cases, depress the brake pedal several times to release the pressure, then lock the brake pedal. If there is still pressure inside the filter, oil may spurt out.

Open the engine side cover on the left of the machine.

Remove bolts (1) and cover (2) is lifted up, then take out element (3).

Clean inside of the case and the removed parts, then install a new element.

Replace the O-ring with a new one.

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. When removing bolts (5), carry out the operation at the rear of the point immediately under the cover so that it is possible to escape at any time.

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

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

REPLACE HIGH-PRESSURE PIPING CLAMPS

Contact your Komatsu distributor to have the engine high-pressure clamps replaced.

REPLACE FUEL SPLAY PREVENTION CAPS

Contact your Komatsu distributor to have the fuel spray prevention cap replaced.;

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?