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Replacement of Full-Flow Filter
--- every 1000 hours
Std. Model
d
CAUTION: 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.
Procedures:
1. Park the machine on solid and level ground. Fully extend
the bucket cylinder, fully retract the arm cylinder, and
lower the bucket to the ground as illustrated in the right.
Stop the engine.
2. Before replacing the element, be sure to bleed air
pressure from the hydraulic oil tank by pressing the air
bleed valve on the hydraulic oil tank.
3. Loosen bolts (1) (6 used) to remove cover (2) and O-ring
(3). When removing cover (2), slowly remove it while
pressing the cover downward so that spring (4) does not
fly out.
4. Remove the spring (4) and element (5).
5. Take extra care never to allow water or dust to enter the
filter case.
6. Replace element (5) and O-ring with new ones. Install
them into the hydraulic oil tank. Be careful not to
damage element (5) and O-ring (3).
Broken element (5) is unusable.
7. Install cover (2) with bolt (1) (6 used).
Tightening Torque: 50 N·m (5 kgf·m)
8. Bleed air from the pump after replacing the element.
(Refer to the descriptions for "
hydraulic system")
If the machine is operated with air mixed in the hydraulic
circuit, damage to the pump may result.
9. Replace element (5) at the regular interval to keep
hydraulic oil clean and to extend the service life of the
hydraulic components.
MAINTENANCE
Bleed air from the
7-41
M104-07-021
1
2
3
M178-07-069
4
5
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