General Pump KFZ 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 valve inspection, replace all valve units and valve plugs, o-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
KFZ SERIES
Page 10
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”
To facilitate insertion of the valve guide on the seat, you can use a pad placed on the horizontal surfaces of the
guide (fig. 16a) and drive it with a sliding hammer.
Insert the suction and delivery valve units checking that they are thoroughly inserted in the head seat. Apply the valve
covers and proceed with calibrating the related M12 x 35 screws with a torque wrench as indicated in Chapter 3.