Maintenance
Safety, Operation and Maintenance Manual - Aug 2012 5-83
SY115C9/135C/155H Crawler Hydraulic Excavator
1. Park your machine on a hard, level ground.
Adjust the work equipment to an attitude
ready for service, as shown in the right
illustration. Lower the work equipment to
ground and turn off the engine.
2. Lock out and tag out your machine before
proceeding. See
“Lock-out tag-out” on
page 2-60.
3. Turn the butterfl y nut on the breather valve
and press the venting button.
4. Loosen the four bolts and remove the cap
(1). When the cap is removed, it may fly
out due to the action of the spring (2). In
this case, hold down the cap when remov-
ing the bolts.
CZ335-1104086
1
CZ335-1104087
Breather valve
Butterfly nut
Fig. 5-92
Fig. 5-93
5. Remove the spring (2), valve (3) and
strainer (4) before disassembling the fi lter
(5).
●
Check the bottom of the filter box and
remove the dirt if any. Keep the hydrau-
lic oil free from any dirt.
6. Clean the disassembled parts with clean-
ing oil.
7. Install a new fi lter.
8. Restore the valve (3), strainer (4) and
spring (2).
9. Install the cap (1) to its position. Hold down
the cap and tighten the bolts.
10. In order to vent the air, start the engine
(see "Engine Starting" in the Operation
Section) and run the engine at low idle for
10 minutes.
11. Stop the engine.
1
2
3
4
5
CZ335-1104088
Fig. 5-94
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