Komatsu HM400-1, Manual

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MAINTENANCE
SERVICE PROCEDURE
EVERY 500 HOURS SERVICE
Maintenance for every 50 and 250 hours service should be carried out at the same time.
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE
WARNING
The parts and oil is at high temperature after the engine has been operated, and it can result in a burn. Wait for the oil to cool down
before changing it.
Refill capacity: 52 liters (13.74 US gal)
Prepare a filter wrench
1. Set a container to catch the oil immediately under the drain valve under the chassis.
2. Remove drain plug (1), then loosen drain valve (2) slowly to
avoid getting oil on yourself, and drain the oil. Be careful not to
loosen the drain valve too far and deform the stopper pin inside
the valve.
3. Check the drained oil, and if there are excessive metal
particles or foreign material, please contact your Komatsu
distributor.
4. Tighten drain valve (2) and drain plug (1).
Tightening torque
Drain plug (1), drain plug (2): 68.6
±
9.8 N
·
m
(7
±
1 kgf
·
m, 50.6
±
7.2 lbft)
5. Using the filter wrench, turn filter cartridge (3) to the left to
remove it.
When doing this, to prevent getting oil on yourself, do not carry
out this operation from immediately under the cartridge.
In particular, if this operation is carried out immediately after
stopping the engine, a large amount of oil will come out, so wait
for 10 minutes before starting the operation.
6. Clean the filter holder, fill the new filter cartridge with engine oil,
coat the packing face and thread with engine oil (or coat thinly
with grease), then install the filter cartridge.
7. Install the filter cartridge. When doing this, be careful not to damage the outside cylinder of the cartridge.
When installing the filter cartridge, tighten until the packing face is in contact with the filter holder, then tighten
a further 3/4 to 1 turn.
8. Add engine oil through oil filler (F) to fill to the specified level.
9. Run the engine for a short time at idling, then check the oil if it
is filled up to a specified level. For details, see "CHECK OIL
LEVEL IN ENGINE OIL PAN, ADD OIL (PAGE 3-72)".
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