Pratissoli SS64 Serie Manuel De Réparation page 24

To reassemble the various components, perform the
operations listed above in reverse order to par. 2.2.1.
Reassemble the valve units (Fig. 22 and Fig. 22/a) to facilitate
insertion of the valve guide in the seat, use a hammer, acting
on the whole circumference (Fig. 23).
Insert the suction and outlet valve units,
checking that they are fully inserted in the head
seat.
Then apply the valve covers and calibrate the
respective M12x130 (M12x190 on SW64) +
M12x45 screws (suction valve cover) and M12x35
(outlet valve cover) screws, for the values of the
torques and tightening sequences follow the
instructions in chapter 3.
2.2.3 Disassembly of the head-valve units (only
SN6416 and SN6418)
Operations are limited to inspection or replacement of valves,
if necessary and, however, at the intervals indicated in the
"PREVENTIVE MAINTENANCE" table in chapter 11 of the use
and maintenance manual.
The valve units are assembled vertically inside the head.
Operate as follows to extract them: unscrew the 8 M14.40
valve cover fixing screws (Fig. 24);
using the extractor hammer code 26019400, extract:
A) Valve plugs (Fig. 25);
B) Outlet valve units (Fig. 26);
C) Valve bushes (Fig. 27), combined with tool code 27513600;
E) Suction valve units (Fig. 28);
Fig. 22
Fig. 22/a
Fig. 23
24
Fig. 24
Fig. 25
Fig. 26