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3
Change Hydraulic Oil
4
Suction Filter Cleaning
--- every 4000 hours, 2500 hours or 1500 hours
d
WARNING: Hydraulic oil may be hot just after opera-
tion. Wait for oil to cool before starting work.
IMPORTANT: Hydraulic oil changing intervals differ
according to kind of hydraulic oils used.
(See Recommended Oil Chart in this group)
1. Park the machine on a level surface with the
upperstructure rotated 90° for easier access.
2. (Backhoe)
Position the machine with the arm cylinder fully
retracted and the bucket cylinder fully extended.
3. Lower the bucket to the ground.
4. Turn the auto-idle switch off.
IMPORTANT: The turbocharger may be damaged if the
engine is not properly shut down.
5. Run the engine at slow idle speed without load for five
minutes.
6. Stop the engine. Remove the key from the key switch.
7. Pull the pilot control shut-off lever to the LOCK position.
8. Clean the top of the hydraulic oil tank to keep dirt out of
the hydraulic system.
9. Leave the machine for a while after stopping operation.
After the oil temperature is cooled, push pressure release
button (1) to release pressure from the hydraulic oil tank.
10. Remove cover (2).
11. Remove oil using a suction pump. The hydraulic oil tank
capacity, up to specified oil level, is approximately 560
liter (148 US gal)
12. Remove drain plug (5) and open drain cock (3).
Allow oil to drain.
MAINTENANCE
3
7-53
2
5
M104-07-117
1
M1J1-07-006
M1J1-07-079
M1J1-07-037
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