General Pump MW Repair Manual - Manual (Page 32)

GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
Page 32
Assemble the suction and outlet valve units (fig. 109 and fig. 110), 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. 111) and use an extractor hammer acting on the whole circumference.
Insert the O-ring, exploded position 6 from the Owner’s Manual (1, fig. 113).
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 position 5 from the Owner’s Manual (1, fig. 112).
Ref 300791 Rev.C
11-12