Reassembling The Head - Liners - Valves; Disassembly Of The Piston Unit - Supports - Seals - Interpump Group Pratissoli KV Serie Manual De Reparación

- Extract the valve seats  as shown in Fig. 25, check
the various components for wear and replace them if
necessary, see Fig. 26.
At every valve inspection, always replace all the
sealing rings and the O-rings between the liner
and the head, between the head and the liner
spacer in the area of the recirculation hole.
Before reassembly, clean and dry off the
components and all their seats inside the head.
3
- Extract the outlet plates  and their guides  with the
springs, as shown in Fig. 27 and Fig. 28, check for wear
and replace if necessary, and in any case within the times
indicated in the "PREVENTIVE MAINTENANCE" table of
chapter 11 in the Use and maintenance manual.
2.2.2

Reassembling the head - liners - valves

To reassemble the components, invert the
previously listed operations, paying attention to
the correct assembly of the liner spacer: when the
component is mounted, the two rough casting
exhausts present on one of the sides must be
oriented towards the lower part of the casing (pump
bracket side).
Heads - liners: proceed with assembly and head
screw calibration, and then continue with the
calibration of the liner fastening screws.
For the tightening torques and the various phases,
follow the instructions in chapter 3.
2.2.3 Disassembly of the piston unit – supports – seals
The piston unit does not require any routine maintenance.
Service operations are limited to the visual inspection of the
Fig. 26
cooling circuit's draining. In case of anomalies / oscillations
on the delivery pressure gauge, or pulsating of the cooling
circuit's draining pipe (if flexible), seal packings must be
inspected and replaced if necessary.
Proceed as follows to remove the piston units.
- Separate the head and the spacer for the liners from the
pump casing as shown in par. 2.2.1 (Fig. 19, Fig. 20).
Fig. 27
4
- Remove the pumping elements with a fork wrench and
check for wear as indicated in Fig. 29 and Fig. 30, replace
them if necessary.
Fig. 28
- Remove the M6x65 screws that fix the LP seals supports,
HP seals support and liner as shown in Fig. 31, and
proceed to the separation of all the components as
indicated in Fig. 32 and Fig. 33.
24
Fig. 29
Fig. 30