Dismantling The Head - Seals - Pratissoli KE Serie Manual De Reparación

To reassemble the various components, perform the
operations listed above in reverse order to par. 2.2.1. To
facilitate insertion of the valve guide in its housing, you can
use a bush resting on the horizontal guide planes and use a
hammer acting on the whole circumference (Fig. 19/a).
Fig. 18
Insert the suction and outlet valve units,
checking that they are fully inserted in the head
seat.
Then apply the valve covers and calibrate the
respective M10x25 screws with a torque wrench
at the specified torque.
2.2.3 Dismantling the head – seals
Replacement of the seals is necessary from the moment you
begin to detect water leaks from the drainage holes provided
on the back of the pump casing, and at the intervals indicated
in the "PREVENTIVE MAINTENANCE" table in chapter 11 of the
Use and maintenance manual.
A) Unscrew the M10x110 head fixing screws as indicated in
Fig. 20.
Fig. 19
B) Separate the head from the pump casing.
C) Extract the high pressure seals from the head and the
low pressure ones from the support, using simple tools
as indicated in Fig. 21, being careful not to damage the
respective housings.
Fig. 19/a
20
Fig. 19/b
Fig. 20