Change Hydraulic Oil - Hitachi EX27U Operator's Manual

Change Hydraulic Oil

Clean Suction Filter
--- every 2000 hours
IMPORTANT: Hydraulic oil changing intervals differ
according to kind of hydraulic oil used.
See recommended oil chart.
CAUTION: Hydraulic oil may be hot. Wait for oil
to cool before starting work.
1. Park the machine on a level surface.
2. Position the machine with the arm cylinder fully re-
tracted and the bucket cylinder fully extended.
3. Lower the bucket and blade to the ground.
4. Run the engine at slow idle speed without load for
three minutes.
5. Stop the engine. Remove the key from the key
switch.
6. Pull the pilot control shut-off lever to the LOCK posi-
tion.
7. Clean the top of the hydraulic oil tank to keep dirt out
of the hydraulic system.
CAUTION: The hydraulic oil tank is pressurized.
Slowly loose cap (1) to release pressure.
8. Slowly loosen cap (1) to release pressure.
9. Remove cap (1).
10. Drain oil using a suction pump. The hydraulic oil tank
capacity, up to specified oil level, is approximately 70
liters.
MAINTENANCE
7-25
EX27u, EX35u
1
EX50u
M586-05-030
2
SS-1789
M571-07-019