EVERY 500 HOURS MAINTENANCE
METHOD
FOR CHANGING OIL IN ENGINE OIL PAN, REPLACING ENGINE OIL
FILTER CARTRIDGE
WARNING
Immediately after the engine is stopped, its parts and oil are still very hot, and may cause burn injury.
Accordingly
, wait until they have cooled down before starting the work.
• Refill capacity: 80 ℓ
• Prepare a socket wrench and a filter wrench.
If the operating hours do not reach 500 hours in 12 months, replace the engine oil and filter cartridge every 12
months.
If the operating hours reach 500 hours within 12 months, replace it every 500 hours.
1.
Remove the cover under the machine and put a container
under the drain plug to catch the drained oil.
2.
Remove the drain plug (1) and loosen the drain valve (2)
slowly so that you will not get oil on yourself to drain the
oil.
Take care not to deform the stopper pin in the drain valve
(2) by loosening the valve too much.
Tightening torque of drain plug (1): 68.6±9.8 Nm 
{7±1 kgm} 
Tightening torque of drain valve (2): 63.7±14.7 Nm 
{6.5±1.5 kgm} 
3.
Check the drained oil. If it contains much metallic powder
or foreign material, contact your Komatsu distributor.
4.
Tighten the drain valve (2).
5.
Turn the full-flow filter cartridge (3) counterclockwise by us-
ing the filter wrench, and remove it.
6.
Clean the filter head, fill the new filter cartridge with engine
oil,
coat the threaded part and packing surface of the new
filter cartridge with engine oil (or apply thin film of grease),
then install it to the filter head.
7.
When installing the cartridge, tighten it until the packing
surface contacts the filter head, then tighten it 3/4 to1 turn.
ATTACHMENTS AND OPTIONS MACHINE WITH MINING SPECIFICATION
6-37
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