Replace Hydraulic Tank Oil Filter - Hitachi ZW 310-6 Operator's Manual

Replace Hydraulic Tank Oil Filter

--- every 1000 hours
Replace
d
WARNING: Hydraulic oil becomes hot and pressurized
during operation.
Severe burns may result if skin comes in contact
with escaping hydraulic oil immediately after
operation. Wait for the oil to cool before starting any
maintenance work.
Especially when removing the filter, be aware that the
remaining oil in the filter may spill. Use extra care.
1. Park the machine following the same procedures as
described on page 7-8 for preparation of inspection/
maintenance work.
2. Install articulation lock bar to the front and rear of the
frame by following the procedures described on page
7-10.
3. Clean the vicinity around cover plate (1).
4. Arrange a container and workshop towels to receive the
spilled oil and the element. Relieve the air pressure from
the hydraulic oil tank by pressing air bleed valve (8).
5. Loosen bolts (2) (6 used) to remove cover (1) and O-ring
(3).
When removing cover (1), slowly remove the cover while
pressing the cover downward so that spring (4) does not
fly off.
6. Remove spring (4), valve (5) and element (6).
7. Replace element (6) and O-ring (3) with new ones. Install
new element and O-ring in the hydraulic oil tank.
Before installing element (6), make sure that rubber (7) is
present.
8. Install cover (1) with bolts (2) (6 used).
Tightening torque: 50 N·m (5.0 kgf·m)
MAINTENANCE
7-57
2
1
90Z7-7-44-1
3
4
5
6
7
M4GB-07-052