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Maintenance
HYDRAULICS
During any hydraulic maintenance extreme care should be taken to ensure cleanliness of the
hydraulic circuit. By observing strict hydraulic cleanliness the machine will benefit from
fewer hydraulic failures through contamination.
ALWAYS
•
Thoroughly clean the machine before any maintenance.
•
Use fresh, clean hydraulic oil from a sealed container.
•
Ensure old gasket particles and excess sealing compound etc do not enter the system, if
they do drain them out.
•
Ensure new parts and fittings are kept in sealed bags etc, and they are stored away from
any contamination.
•
Remove any flaking paint from around the area being maintained.
•
Use paper roll not rags to wipe parts
•
Inspect the inside of new tanks for debris.
•
If removing hoses always cap them and the port they are removed from.
•
If fitting new hoses to the closed loop hydrostatic circuit ensure they are flushed to NAS 8
NEVER
•
Fit new hoses if both ends do not have a plastic cap fitted to seal them.
•
Fit new valves, pumps, motors, filters, etc if all the ports have not been plugged.
•
Use dirty containers for oil storage.
•
Use dirty containers or funnels for filling the hydraulic system.
•
Store hydraulic components on the floor or in areas where welding or grinding is done or
in a dirty environment.
•
Never fit un-flushed hoses to the closed loop hydrostatic circuit.
HYDRAULIC FILTERS
The system components are maintenance free other than the following:
•
Return flow/ Suction flow filter
•
Suction strainer
When renewing these filters, the area around the filter should be thoroughly cleaned before
removing the old filters to prevent the ingress of dirt into the hydraulic system. Hydrostatic
drive systems need to be run on an exceptionally clean oil. Remember it is the small particles
of dirt invisible to the naked eye that does the harm.
When removing these parts it is recommended the system is drained and refilled
with filtered, clean, new hydraulic oil as specified in the Fluids & Lubricants
section.
NEW OIL FROM A BARREL IS NOT CLEAN IT CONTAINS DIRT PARTICLES.
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