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5 Maintenance
5.2
–
Hydraulic System
5.2.1
–
Hydraulic System Maintenance
•
Wipe all external surfaces of the pump and reservoir tank to remove dirt, dust and
oil residue.
•
Inspect unit for leaks and rectify as necessary.
•
Clean reservoir filler cap, remove and renew if cap and / or seal is damaged. Check
oil level and replenish with clean hydraulic oil. This should preferably be carried out
with actuator (and thus the body ram) at minimum stroke, i.e. with the trailer body
down. The oil should be approximately 25mm (1”) from the top
of the reservoir tank
when full.
•
Fully replace the hydraulic oil at intervals depending upon the severity of the duty
and environment conditions: Very dirty, dusty and damp: 6 months to 1 year.
Otherwise, in more favourable conditions: Approx. 2 yearly.
5.2.2
–
Draining the Tank
•
With the body fully lowered, remove the main pressure supply hose from the ram and
place it into a suitably sized and positioned container.
•
Switch on the electrical operating system (or operate the manual pump) to pump the
oil into the container. Continue until the oil flow virtually ceases.
•
DO NOT RUN AN ELECTRIC PUMP FOR LONGER THAN IS NECESSARY WHEN
THE TANK IS APPROACHING EMPTY
5.2.3
–
Filling the Tank
•
Use clean, filtered oil of the correct grade.
•
Use a filter unit with a
filtration level of 25 microns (25 μm) or better.
Use only clean
jugs and funnels.
•
Contamination of hydraulic oil accounts for the majority of hydraulic
system failures.
