SY135C Excavator OMM
Maintenance
SANY
Operation and Maintenance Manual — 0120
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Hydraulic Oil Inspection
Inspect hydraulic oil for any signs of contamination. Contact a SANY dealer for an oil analysis sample kit if any
abnormality is found. Inspect the filters for signs of metal particles and foreign material.
Check the Hydraulic Lines and Hoses
Check all hydraulic lines and hoses for leaks and replace
damaged or leaking lines and hoses immediately. Any
hydraulic pump lines and connectors connected to the
engine compartment must be replaced if damaged.
Make sure there is sufficient distance between all lines,
hoses, and high-temperature engine components (for
example, the exhaust system) and that there is no friction
between them.
Examine lines and hoses for the following:
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Cracked or loose couplings
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Inspect for damage, cuts, or abrasions in the
external rubber layer
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Hardening, chapping, or burning of the hose
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Cracks, damage, or serious corrosion on the couplings
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Leaks at the couplings
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Twisting, flattening, distortion or broken.
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Blisters or softness in the external hose layer
Also look for these signs of problems when performing a visual inspection:
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Oil leaks from the engine block
NOTICE!
• If the hydraulic oil is contaminated (discolored or containing debris), change the oil
immediately. Find and correct the cause of the contamination before changing the
hydraulic oil.
• Dispose of the hydraulic oil and filters in accordance with all applicable environmental
regulations.
Failure to follow this notice could damage the machine, cause it to operate improperly, or
damage the environment.
Fig. 5-127
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