Pratissoli MK Serie Manuel De Réparation page 62

Slip the spray-guard rings off the piston heads (pos. ,
Fig. 116).
If you need to replace the piston guide seal ring, you need to
remove the oil seal cover as follows:
Unscrew the two screws locking the oil seal cover (pos. ,
Fig. 117).
Position the piston guide at bottom dead centre, screw the
extractor code 27516400 including the M5 adapter code
27516500 in the holes in the cover (pos. , Fig. 118) and
remove the oil seal cover from the pump assembly (pos. ,
Fig. 119).
Replace the oil seal (pos. , Fig. 120) and the outside O-ring
Fig. 116
(pos. , Fig. 120).
Separate the seal support from the liner (pos. , Fig. 121) to
access the pressure seals (pos. , Fig. 122).
Fig. 117
Fig. 118
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Fig. 119
Fig. 120
Fig. 121