7
ENGLISH
To purge residues from the system proceed as follows:
– Keep the foot pump in a horizontal position.
– Disconnect the head from the unit.
– Operate the pedal (09) several times and at the same time keep the pressure release
pedal (31) depressed.
This operation rapidly forces oil through the hydraulic circuits and removes any residues to the
reservoir vent.
5.3) Replacement of the pressure hose
(Ref. to Fig. 9)
– Hold the pump base (38) in a vice, keeping the hose above the level of the vice.
– Using a 19 mm fl at spanner, unscrew the hose from the pump body, while holding the
coiled
hose.
– Carefully clean the thread of the pump body to remove any residual sealing materials.
– Restore the gasket (tefl on tape) on the (male) thread of the new hose.
– Connect the new hose, tightening the relevant nut to the correct torque ratio:
50 Nm
(37
lbf.ft
).
– Eliminate air in the hose as follows: unlock the pedal from the latch.
Depress the ball of the female quick coupler fi tted to the end of the hose and pump
slowly several times, until the oil fl ows. Check the oil level and top up as point
5.1
.
6. FAULT DIAGNOSIS
Symptom:
foot pump builds up pressure, but the ram of the connected head doesn’t
advance.
Remedy:
make sure that quick coupler between head and flexible hose is properly
locked.
Symptom:
each action of the pedal makes the ram, of the connected head, move,
but it retracts immediately after.
Remedy:
eliminate air bubbles and residue inside the hydraulic circuit as described
in
point
5.2.
Symptom:
dies or blades, of the connected head, do not close completely, and
therefore compression, cutting operation is not possible.
Remedy:
check oil level and top up if necessary as described at point
5.1.
Symptom:
the maximum pressure relief valve operates before the dies or the blades
have fully completed the operation.
Remedy:
check the correct setting of the valve with the special gauge MPC1.
