Pratissoli LK Serie Manual De Reparación página 58

Assemble the suction and outlet valve units (Fig. 116 and
Fig. 117) taking care not to invert the previously disassembled
springs.
To facilitate insertion of the valve guide in its housing,
you can use a pipe resting on the horizontal guide planes
(Fig. 118) and use an extractor hammer acting on the whole
circumference
Proceed with insertion of the valve units (suction
and outlet) in the head, taking care to follow the
correct insertion sequence of O-rings and anti-
extrusion rings.
The proper sequence of valve unit assembly on the head is as
follows:
Insert the anti-extrusion ring, exploded view pos. 4 (pos. ,
Fig. 119).
Insert the O-ring, exploded view pos. 5 (pos. , Fig. 120).
Fig. 116
Ensure that the O-ring and anti-extrusion ring are perfectly
placed in their housings.
Insert the suction valve unit (pos. , Fig. 121) and then the
Fig. 117
spacer (pos. , Fig. 122).
The complete valve unit must be fully inserted into the
bottom and should look like the image in pos. , Fig. 122.
Fig. 118
58
Fig. 119
Fig. 120
Fig. 121