Pratissoli HF Serie Manual De Reparación página 21

Fig. 18
- Disassemble the suction and outlet valve units, screwing
a sufficiently long M8 screw in such a way as to be able to
reach the valve plate and extract the valve guide from the
valve seat (Fig. 21, pos. ).
code 26019400
Fig. 19
code 27513700 = HF18
code 27513500 = HF20-22-25
code 27513400
Fig. 20
Note. Before extracting from the seats, always unscrew the
handle code 27513400.
21
If the suction valve seats remain stuck on the
head (for example because of incrustations due
to prolonged lack of use of the pump), proceed
as follows:
- For HF18 versions use tools code 26019400, code
27513700, code 27513400, (Fig. 22, Fig. 22/a).
- For HF20-22-HF25 versions use tools
code 26019400, code 27513500, code 27513400,
(Fig. 22, Fig. 22/a).
Fig. 21
Fig. 22
Fig. 22/a