Komatsu HD785-5, Operation & Maintenance Manual

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.
MAINTENANCE
SERVICE PROCEDURE
EVERY 500 HOURS SERVICE
Carry out maintenance for EVERY 100 HOURS and EVERY 250 HOURS SERVICE 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: 130 liters (34.32 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.
When draining the oil, fit a standard hose to the drain valve to
prevent the oil from spraying out.
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 valve (2): 68.6
±
9.8N
·
m
(7
±
1 kgf
·
m, 50.6
±
7.2 lbft)
5. Using the filter wrench, turn 4 full-flow filter cartridges (3) and
2 bypass filter cartridges (4) to the left to remove them.
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 oil, then
coat the seal and thread of the filter cartridge with oil (or coat
thinly with grease) and install.
7. When installing the filter cartridge, tighten until the packing
face is in contact with the filter holder, then tighten a further 3/4
- 1 turn.
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