Reassembling The Head - Valve Units; Outlet Valve - Interpump Group Pratissoli HF Serie Reparaturanleitung

2.2.2 Reassembling the head – valve units
Pay particular attention to the conditions of the
various components and replace if necessary,
and at the intervals indicated in the "PREVENTIVE
MAINTENANCE" table in chapter 11 of the Use and
maintenance manual.
At every valve inspection, replace all O-rings and all
anti-extrusion rings both in the valve units and on
the valve plugs.
Before repositioning the valve units, thoroughly
clean and dry the relative seats in the head as shown
in Fig. 23.
To reassemble the various components, perform the
operations listed above in reverse order to par. 2.2.1, taking
particular care with the following:
1 Do not invert the suction springs with the
previously disassembled outlet springs
during assembly of the suction and outlet
valve units (Fig. 24, Fig. 25):
A) "White" suction springs.
B) "Black" outlet springs.
Fig. 23
SUCTION VALVE

OUTLET VALVE

Fig. 24
22
2. On the HF18 – WK355 version, moreover, take
care not to reverse the suction ball valves
with the outlet valve "A" (Fig. 26, Fig. 27),
exploded view pos. 46 as indicated in chapter
16 of the Use and maintenance manual.
Fig. 25
Fig. 26
Fig. 27