Recovering The Heads - Pratissoli MK Serie Manuel De Réparation

2.2.5

Recovering the heads

If the insides of the piston chambers on the head show
clear signs of cavitation, due to incorrect pump feeding, it is
possible to recover the damaged head and avoid the need to
replace it.
In order to recover the head, perform the operations indicated
in Fig. 146 for the versions with piston Ø 40-45-50 and
indicated in Fig. 147 with piston Ø 55-60-65:
MK40-MK45-MK50
MK55-MK60-MK65
The machined head must be assembled by driving in the
bushes (pos. ) together with the anti-extrusion rings
(pos. ) and O-rings (pos. ) as shown in Fig. 148 for versions
with piston Ø40-45-50 and in Fig. 149 for versions with piston
Ø 55-60-65:
Fig. 146
67
Fig. 147