SANY SY155U, Operation And Maintenance Manual, Page: 155 / 192

MAINTENANCE
5-45
SY155U Excavator OMM
0002408
Figure 5-100
11. Remove the spring (7), rod (8), and suction strainer
(9).
12. Clean the suction strainer of any contaminants.
Inspect and replace if damaged.
13. Install the suction strainer to the boss of the hydraulic
tank.
14. Install a new O-ring for the suction strainer cover.
15. Tighten the cover fasteners securely.
NOTE: Use the extrusion on the bottom of the cap to hold
the spring in place.
16. To purge air from the system, start the engine and
run it at low idle for 10 minutes.
17. Check the hydraulic oil level and add hydraulic oil as
needed. See “Check the Hydraulic Oil Level” on
page 5-17.
NOTICE!
Dispose of hydraulic oil and the strainer in
accordance with all applicable environmental
regulations. Failure to follow this notice could
damage the environment.
Check the Hydraulic Hoses
0003614
Figure 5-101
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Open the appropriate access covers or compartment
doors. See “Doors, Panels, Covers, and Filler Cap”
on page 4-5.
3. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
4. Check all lines and hoses for leaks. Repair or replace
as needed.
5. Make sure there is a sufficient distance between all
lines and hoses and high-temperature engine
components.
Examine hoses for the following:
• Cracked or loose hose couplings.
• Damage, cuts, or abrasions in the external rubber
layer.
• Hardening, chapping, or burning of the hose.
• Cracks, damage, or serious corrosion on the
couplings.
• Leaks at the hose couplings.
• Twisted, broken, flat, or distorted hose.
• Blisters, leaks, or softness in the external hose layer.
If any damage is found, contact a SANY dealer.
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