SY265C LC/SY265C LR Excavator OMM
5-76
Operation and Maintenance Manual — 0420
SANY
Check the Hydraulic Hoses and Lines
Check all hydraulic hoses and lines for leaks. Replace damaged or leaking hydraulic hoses and lines immediately.
Make sure there is sufficient distance between all lines and hoses and the high-temperature engine components (for
example, the exhaust system).
Prepare the machine for service. See “Maintenance Safety” on page 2-8. Examine hydraulic hoses and lines for the
following:
•
Couplings that are cracked or have become loose.
•
Damage, cuts, or abrasions.
•
Hardening, chapping, or burning of hose.
•
Cracks or serious corrosion on the couplings.
•
Leaks at the couplings.
•
Twisted, broken, flat, or distorted hoses or lines.
•
Blisters or softness in the external hose layer.
Change the Hydraulic Oil
1. Park the machine on a flat, level surface and position the work equipment as shown on the hydraulic tank
decal.
2. Prepare the machine for service. See “Maintenance Safety” on page 2-8.
3. Relieve hydraulic system pressure. See “Relieve Hydraulic System Pressure” on page 5-67.
WARNING!
Never open a hydraulic component under pressure. Escaping hydraulic oil is under high
pressure and can penetrate the skin and cause serious injury or death. Do not use hands to
check for leaks. Wear gloves, eye protection, and other personal protective equipment (PPE)
and use a piece of cardboard or paper to search for suspected leaks.
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.
