General Pump KEZ Repair Manual - Manual (Page 10)

2.2.2 Head assembly - valve units
Pay careful attention to state of wear of the various components; replace them when necessary, and
in any case within the intervals indicated in the table in fig. 14, Chapter 11 of the Owner’s Manual.
At each inspection, replace all valve units and valve plugs OR rings and enti-extrusion rings.
Before repositioning the valve units, clean and perfectly dry the relevant seats in the head as
indicated in fig. 14.
GENERAL PUMP
A member of the Interpump Group
KEZ SERIES
Page 10
Disassemble the valve assemblies with simple tools - a couple of screw drivers (fig. 13) would work more than fine.
Components valve assemblies are pressed together with a minimal load, therefore the job results extremely
easy to be carried out. Being the valve cages are made of polymer, attention should be taken during service in
order to prevent the cage ribs from being damaged.
fig. 13
fig. 14
Proceed with reassembly by inverting the proceedure indicated in paragraph 2.2.1.
During the assembly of the suction and delivery valve units (fig. 15 - fig. 16) do not invert the suction
springs with the previously disassembled delivery springs:
a) Suction springs “white”
b) Delivery springs “black”