Pratissoli KF5M Serie Manual De Reparación página 27

2.2.4.2 Reassembly
A) Assemble the piston seal with the seal support (on which
the O-ring will be replaced), the seal fastening bush and
the M8 screw (Fig. 29).
B) Lubricate the piston seal with abundant OCILIS 250
silicone grease code 12001600 (Fig. 30).
C) With the aid of a T-handle wrench, insert the piston seal
pack inside the cylinder (Fig. 31) with the piston spacer
unit at TDC, taking care not to damage the seal lip.
Screw the M8 screws in so that the seal pack positions
itself in the seat and tighten it with the tightening torque
contained in chapter 3.
2.2.5
2.2.5.1
Cylinder replacement is necessary whenever consistent
bentonite leaks are detected from the opening under the
head spacer. It is plausible to think that the state of wear of
the component will be strongly correlated with the type of
fluid and the percentage of the presence of solid residues.
Proceed as follows to extract the liner:
A) Remove the front cover as indicated in Fig. 21 and
unscrew the M12 screws as indicated in Fig. 21/a.
B) Separate the head from the pump casing (Fig. 32) and
extract the liner (Fig. 33), with the aid of adjustable pliers,
and the relative seal (Fig. 34).
Fig. 29
Fig. 30
Fig. 31
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Cylinder
Disassembly
Fig. 32
Fig. 33
Fig. 34