Hitachi EX 3600-6 Operator's Manual page 199

NOTE: There is spring tension under the cover. Hold
down the cover when removing last two bolts.
11. Hold down filter cover (2) against light spring load
when removing the last two bolts. Remove filter cover
(2).
12. Remove spring (5), valve (6), and element (7).
NOTE: Remove the element and inspect for metal par-
ticles and debris in the bottom of the filter case.
Excessive amounts of brass and steel particles
can indicate a failed hydraulic pump, motor,
valve or an impending failure. A rubber type of
material can indicate cylinder packing failure.
13. Discard element (7) and O-ring (4).
14. Install a new element (7), valve (6) and spring (5).
15. Install filter cover (2) with a new O-ring (4).
16. Install and tighten bolts (3) to 49 N⋅m (5 kgf⋅m, 36
lbf⋅ft).
17. Repeat steps 11 to 16 for the other filter.
MAINTENANCE
7-60
2
3
4
5
6
7
M111-07-040