SANY SY155U, Operation And Maintenance Manual, Page: 152 / 192

5-42
MAINTENANCE
SY155U Excavator OMM
7. Remove the filter element (4) from the housing (3).
8. Clean the inside of the pilot filter housing.
NOTE: Be careful not to cross-thread the filter housing
during installation so the mating surfaces seal
correctly.
9. Install a new filter element inside the filter housing.
10. Install the filter housing.
11. Close the right rear access panel.
12. Set the hydraulic lockout control lever to the locked
(closed) position.
NOTE: See “Hydraulic Lockout Control Lever” on
page 3-6 for additional information.
13. Bleed air from the system by starting the engine and
allowing it to run at low idle for 10 minutes.
Replace the Hydraulic Tank 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 pressure to prevent injury.
Failure to follow these warnings could result in
death or serious injury.
0003551
Figure 5-88
1. Park the machine in a secure location and position
the work equipment as shown.
2. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
3. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
0003557
Figure 5-89
4. Remove the vent cap (1) from the breather valve.
0003558
Figure 5-90
5. Press the vent button (2) to release any pressure.
6. Install the vent cap.
0003586
Figure 5-91
7. Remove the four fasteners (3) and the plate (4).
1
2
3
4