IV.
Undo the swivel fitting holding the hydraulic hose to the power pack. Plug or tape the
fittings to prevent ingress of dirt.
V.
Undo the 2 bolts or screws holding the power pack mount bracket and lift it away.
Refitting is a reversal of the above procedure, with attention to the following points:
I.
Ensure the wiring is reconnected the same as original.
II.
Do not use thread sealant on the hydraulic fitting.
III.
Test for correct operation before refitting the cover.
5.3
Lowering Valve
Removal and Refitting
IV.
Unscrew the retainer nut and slide the coil off.
V.
Unscrew the valve from the main body using a ring spanner.
VI.
Clean the valve carefully with compressed air. Ensure that the centre poppet can move
freely, and that it seals firmly on the valve seat when released.
VII.
Clean the valve orifice before refitting the valve.
VIII.
Refit the valve and coil.
5.4
Pressure Relief Valve
The pressure-relief valve limits the maximum hydraulic pressure flowing to the ram, and thus the
maximum weight that can be lifted. If the bin is heavier than the setting will allow, the motor and
pump still run but the oil just bypasses straight back into the tank. While this does not do any harm
to the machine, oil passing through the relief valve generates a lot of heat; for this reason, if the
Lowering Valve
•
From top left:
valve cartidge,
coil, retainer nut;
rubber gasker;
DIN plug
