Pratissoli SS64 Serie Manuel De Réparation page 29

2.2.9 Wiper reassembly (SW64)
To replace the wiper, proceed as follows:
A) Assemble the wiper in the housing on the support (Fig. 45),
using a buffer as necessary and taking care not to damage
the seal lip.
B) Reposition the wiper support with lubrication on the
piston spacer (Fig. 46), in the casing seat (Fig. 47). If
removed, reassemble the piston spacer with lubrication
after assembling the wiper support (see par. 2.2.11). Take
care not to damage the seal lip.
Fig. 44
C) Reposition the head spacer and the head on the casing.
D) Fasten the header tightening the M12x190 screws.
For the values of the torques and tightening sequences follow
the instructions contained in chapter 3.
2.2.10 Piston spacer disassembly (SW64)
The piston spacer does not require any routine maintenance.
Maintenance is limited to visual checks only.
Proceed as follows to extract:
A) After having removed the head and the head spacer, free
the spacer as indicated in Fig. 48.
Fig. 45
B) Check and verify their wear conditions, replace if
necessary.
Fig. 46
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Fig. 47
Fig. 48