Maintenance
SY50U Excavator OMM
5-50
Operation and Maintenance Manual — 0120
SANY
7. Install a new filter element, gasket, and O-ring. Install the filter bowl and tighten securely.
8. To purge air from the system, start the engine and run it at low idle for 10 minutes. Check for leaks.
Replace the Hydraulic Oil Return Filter
1. Prepare the machine for service. See “Maintenance Safety” on page
2. Relieve system pressure. See “Relieve Hydraulic System Pressure” on page
WARNING!
Never use hands to search for hydraulic oil leaks. Use a piece of cardboard or paper.
Hydraulic oil leaking under pressure can penetrate the skin. Failure to follow this warning
could result in death or serious injury.
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
breather. 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 the return filter before filling the hydraulic tank and returning the machine to service.