Replace Breaker Circuit Return Oil Filter - Hitachi ZAXIS 450LC-3 Operator's Manual

REPLACE BREAKER CIRCUIT RETURN OIL FILTER

d
WARNING: Hydraulic oil may be hot just after
operation. Wait for oil to cool before starting work.
1. Park the machine on a level surface.
Lower the breaker to the ground.
2. Leave the machine for a while after stopping operation.
After the oil temperature is cooled, push air bleed valve
(10) to bleed air from the hydraulic oil tank.
3. Loosen drain plug (9) to drain hydraulic oil from filter
case (7).
4. Remove bolts (1) to remove cover assembly (4).
5. Remove element (6).
Inspect element (6) for metal debris to help in early
detection of failures.
6. Install a new element (6).
7. Inspect O-rings (2), (3), (5) and (8) for any damage.
Replace damaged O-rings.
8. Confirm that O-rings (2) and (3) are securely in the
grooves.
Install cover assembly (4) so that arrows (A) on the cover
point left, as shown in the figure.
9. Tighten drain plug (9).
Tightening Torque: 45 N•m (4.5 kgf•m, 32.5 lbf•ft)
10. Tighten bolts (1).
Tightening Torque: 130 to 150 N•m
(13 to 15 kgf•m, 94 to 108 lbf•ft)
OPERATING THE MACHINE
5-28
Front
Cab
Breaker-Circuit-Return-Oil Filter
10
M1J1-07-006
A
M111-05-009
1
2
(A810135)
3
(A810095)
4
5
6
(4357445)
7
8
(954493)
9
M111-05-011