Pratissoli KF5M Serie Manual De Reparación página 24

2.2.2 Wiper
2.2.2.1 Disassembly
Wiper replacement is necessary whenever bentonite leaks
are detected from the second drainage chamber present
between the spacer and the pump casing (Fig. 21). However,
an indication of estimated component replacement intervals
is present in the table in Fig. 18 in chapter 11 of the Use and
maintenance manual.
Fig. 19
A) Remove the front cover as indicated in Fig. 21/a and
unscrew the M12 screws as indicated in Fig. 21/b.
Fig. 20
Fig. 20/a
B) Remove the head and the head spacer from the pump
casing.
C) Extract the wiper support (Fig. 22) and remove the wiper
using a simple tool as indicated in Fig. 22/a, taking care
not to damage the seat. If necessary, remove the piston
spacer (pos. ), before extracting the wiper support
(see par. 2.2.3.1).
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Fig. 21
Fig. 21/a
Fig. 21/b