16
Power Pack.
The hydraulic system is fully self contained. Oil tank
capacity is 15 Litres. When operating above 0C we
recommend using ISO22 Grade Hydraulic Mineral Oil
(See Health & Safety guidelines supplied with the oil
prior to handling).
Replace oil and filter every 6 months. The biggest
cause of hydraulic problem, sticking valves, leaking
cylinders etc.. are due to contaminated oil. There is no
need to replace the oil in the hoses. Just replace the
oil in the tank.
The return line filter doubles as the oil filler cap. No oil
is used by the system so if oil is required this would
indicate an oil leak which must be investigated prior to
using the machine.
Correct Oil Level.
It is critical that the correct oil level is maintained. Too little oil will cause cavitation and
failure of the pump. Too much oil will lead to oil leak through the return filter breather or a
massive oil leak when using the emergency lower valves on the top and bottom boom. The
rams are double acting. When using the emergency lower valves you require free space in
the tank to accommodate oil which normally would be pumped into the annular side of the
cylinder. If this should happen, just clean up the oil spillage. Fully extend ALL rams. Then
close up all rams and check the free space in the tank using the dip stick. Oil must be at the
bottom mark on the dipstick to ensure correct level.
DC Motor & Pump.
The hydraulic pump is submerged in the tank. Oil
is drawn in through a suction strainer protecting
the pump. The DC motor (shown) is directly
coupled to the pump shaft. On AC motor a small
adapter coupling is used between the motor and
pump shaft. To replace the pump the tank must
be removed. Remove the power pack from the
machine. The tank is secured with 4 bolt.
Remove the tank. The pump is bolted to the
aluminium block containing the relief valve
(Hidden under the red cap shown here - Relief
valve is factory set to 210Bar). Remove the 4
fixing bolts securing the pump.
Filter Breather
MAINTENANCE PROCEDURE
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