Every 500 Hours Service - Komatsu AX20 Operation & Maintenance Manual

31. MAINTENANCE
31.4

EVERY 500 HOURS SERVICE

n CHANGE OIL IN ENGINE OIL PAN AND REPLACE ENGINE OIL FILTER
See procedure on page 4-16.
n (DIESEL ENGINE) DRAIN WATER FROM THE FUEL FILTER AND REPLACE THE FUEL FILTER
CARTRIDGE
DRAIN FUEL FILTER (See illustration)
Loosen the combination sensor plug and drain any water and
sediment accumulated at the bottom of the filter.
NOTICE
Fuel will also drain out of the fuel filter, so prepare a suitable
container to catch it.
Always be sure to wipe up any spilled fuel.
REPLACE FUEL FILTER
1. Remove the combination sensor plug at the bottom of the car-
tridge.
2. Using a filter wrench, remove the cartridge.
3. Install the combination sensor plug on the new cartridge.
4. Fill the new cartridge with clean fuel, coat the packing surface
with a thin layer of clean engine oil, then install.
5. Loosen plug (1) and hand pump knob (2) up and down to bleed
air bubbles from fuel. Continue until no more bubbles come out
with the fuel.
6. Tighten plug (1).
n CLEAN LPG FILTER
Clean the "bronze mesh" LPG filter every 600
hours of operation or every 3 months of
service, whichever comes first.
Replace the filter element every 2,400 hours of
operation or every 12 months, whichever
comes first.
In dusty operating conditions, carry out
maintenance as often as possible.
1. Carefully remove the LPG filter (8) from the
filter cover (10) located on the lower portion
of the LPG Solenoid Valve. Use care not to
damage the O-ring (9).
2. Clean bronze mesh filter with suitable
cleaning solvent.
3. While wearing eye protection, blow out and
dry the filter.
4. Reinstall the cleaned filter. Ensure that the
O-ring is properly seated and gently tighten
cover screws.
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