Maintenance
SY50U Excavator OMM
5-6
Operation and Maintenance Manual — 0120
SANY
SANY-Approved Lubricants
Always use SANY-approved lubricants and engine coolants. Never mix different lubricant brands or viscosities.
The use of non-approved lubricants and engine coolants, or mixing different lubricant brands or viscosities, may
result in shortened service life or system failure.
Windshield Washer Fluid
Use clean automotive windshield washer fluid only. Do not mix concentrates into the windshield washer fluid.
Oil and Filter Inspection
Before changing the engine or hydraulic oil or filters, inspect them for contamination. If contamination is found,
send a sample of the oil for testing to help determine the cause. Consult with a SANY dealer before operating the
machine.
Collect Oil Sample
Collect and send an oil sample for testing in accordance to the maintenance schedule. Obtain and follow the
instructions within an Oil Analysis Sample Kit from a SANY dealer.
Fuel Tank Strainer
The fuel tank strainer should always be installed when fueling the machine. The fuel tank strainer prevents larger
dirt and other contaminates from entering the fuel system. The fuel tank strainer does not filter out very small or
non-solid impurities.
Preventing Contamination
Clean dirt, dust, and debris from the hydraulic tank filler cap or cover before opening. Make sure objects do not fall
into the tank and contaminate fluids during servicing. If any object falls into any tank, remove it immediately.
Failure to do so could result in component malfunction, damage to the machine, or improper machine operation.
Installation of Hydraulic Hoses
When disassembling parts sealed by O-rings or gaskets, clean the surfaces before installing the new parts. Always
install new O-rings and gaskets.
Never kink or twist a hydraulic hose during removal or installation. Hydraulic hoses that have been kinked or
twisted can be damaged internally, which can considerably shorten the service life of the hose.
Securing Access Covers and Compartment Doors
When servicing the machine with any access cover or compartment door open, use the lock latch or bar to secure
NOTICE!
Failure to inspect oils and filters for contamination may result in damage to the machine or
cause improper operation.