Dismantling The Head - Seals; Dismantling The Piston Unit - Interpump Group Pratissoli KT Serie Manual De Reparación

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 M10x140 head fixing screws as indicated in
Fig. 29.
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. 30, pos.  being careful not to damage
the respective housings.
Pay attention to the order of seal pack
disassembly as indicated in Fig. 31 for KT 20-
KT22 version pumps and in Fig. 31/a for KT18
version pumps, composed of:
1. Head ring
2. HP seal
3. Restop ring
4. Seal support
5. LP seal
6. Seal ring
7. O-ring
Fig. 29
2.2.4

Dismantling the piston unit

The piston unit does not require any routine maintenance.
Maintenance is limited to visual checks only.
Proceed as follows to extract piston units: loosen the M7x1
piston fixing screws as indicated in Fig. 32:
Fig. 30
Check and verify their conditions, replace if necessary.
At every disassembly, all O-rings on the piston
unit must be replaced.
24
Fig. 31
Fig. 31/a
Fig. 32