SANY SY95C, Operation And Maintenance Manual

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5-34
MAINTENANCE
SY95C Excavator OMM
11. Check the hydraulic oil level and add hydraulic oil as
needed. See “Check the Hydraulic Oil Level” on
page 4-9.
Replace the Hydraulic Oil Return Filter
WARNING
• Allow the hydraulic system to cool before
servicing. Hot oil may cause burns or other
serious injury.
• The hydraulic tank may be under pressure, and
hydraulic oil may be present at the filler cap.
Relieve any pressure to prevent injury.
Failure to follow this warning could result in death
or serious injury.
NOTICE!
Examine the return filter for metal chips and
debris. An excessive amount of bronze and steel
chips indicates that the hydraulic pump or a
hydraulic motor has been damaged. Rubber
debris indicates seal and/or gasket damage.
Inspect these components before filling the
hydraulic tank and returning the machine to
service.
1. Prepare the machine for service. See “Maintenance
Safety” on page 2-5.
2. Relieve system pressure. See “Relieve Hydraulic
System Pressure” on page 5-31.
0004539
Figure 5-55
0002397
Figure 5-56
3. Clean the top of the hydraulic tank and remove
contaminants from around the return filter cover (1).
4. Loosen the four fasteners (2) securing the return filter
cover. Push the cover down against spring pressure
while removing the fasteners. Remove the cover.
5. Remove the spring (3) and return filter (4).
NOTICE!
Dispose of the contaminated oil and filter in
accordance with all applicable environmental
regulations. Failure to do so could damage the
environment.
6. Dispose of the used return filter and spring. Install a
new return filter and spring.
7. Install a new O-ring for the return filter cover. Tighten
the fasteners securely.
8. To purge air from the system, start the engine and
run at low idle for 10 minutes.
9. Check the hydraulic oil level and add hydraulic oil as
needed. See “Check the Hydraulic Oil Level” on
page 4-9.
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