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5.1.3.7. Changing the dispensing pump motor
a) Remove the dispensing pump.
b) Remove the motor by removing the corresponding screws.
c) Unscrew the ceramic piston support. Handle with great
care.
d) Loosen the Allen bolt and remove the stud and the axial
bearing.
e) Fit the axial bearing and the stud on the new motor. The
Allen bolt must coincide with the machined surface of the
motor shaft.
f) Remove the fluidic chamber to access the ring seal and
the plastic disc.
g) Clean off the used grease. Put new grease on the stud and
on the piston support.
h) Fit the motor with the stud and the piston support on the
pump body.
i) Clean the piston if it has been stained with lubricant grease.
j) Fit the plastic disc and the ring seal on the ceramic piston
as shown in the diagram. See the assembly position of the
disc.
k) Refit the fluidic chamber in the pump.
5.1.3.8. Changing the dispensing electrovalve
a) Remove the dispensing pump.
b) Disconnect the fittings and the electrical connector.
c) Remove the screws that hold the electrovalve in position. Access to these screws is easier if the dispensing pump is
removed.
d) Fit the new electrovalve. Do not tighten the screws to excess so as not to deform the plastic body of the electrovalve
and damage its leakproof quality.
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