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MAINTENANCE
EVERY 1000 HOURS MAINTENANCE
Maintenance for every 10, 100, 250, and 500 hours of service should be performed at the same time.
REPLACE HYDRAULIC OIL FILTER ELEMENT
The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the
temperature to go down before starting the work.
When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it.
1. Remove the cap from oil filler (F) on top of the hydraulic tank,
and release the internal pressure.
2. Loosen 4 bolts, then remove cover (1).
When doing this, the cover may fly out under the force of spring
(2), hold the cover down when removing the bolts.
3. After removing spring (2), valve (3) and strainer (5), take out
element (4).
If there are metal particles or foreign material inside strainer
(5), contact your Komatsu distributor.
4. Clean the removed parts in flushing oil.
5. Install the new element in the place where old element (4) was
installed.
REMARK
When doing this, check that the seat surfaces (both ends) of spring
(2) are horizontal.
Check that the seat surface of the spring is not raised as shown in
diagram (A) on the right.
6. Set valve (3), strainer (5) and spring (2) on top of the element.
7. Set cover (1) in position, push it down by hand, and install the cover with the mounting bolts.
8. Install the cap of oil filler port (F).
9. To bleed the air, start the engine according to "STARTING ENGINE (PAGE 3-98)" and run the engine at low idle
for 10 minutes.
10. Stop the engine.
WARNING
MAINTENANCE PROCEDURE
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