General Pump HF Repair Manual - Manual (Page 11)

GENERAL PUMP
A member of the Interpump Group
HF SERIES
Page 11
Pay careful attention to the state of wear of the various components; replace them when
necesary, and in any case within the invervals indicated in the table in fig. 14, Chapter 11 of
the Owner’s Manual. At each valve inspection, replace all valve unit and valve plug O-rings
and anti-extrusion rings.
Before repositioning the valve units, clean and completely dry the relevant seats in the
head as indicated in fig. 20.
Proceed with reassembly by inverting the procedure indicated in paragraph 2.2.1, paying particular
attention to:
1. During the assembly of the inlet and outlet valve units (fig. 21 and 22) do not invert the
inlet springs with the previously disassembled outlet springs:
a) Inlet springs are white
b) Outlet springs are black
Ref 300623 Rev.A
01-12
2.2.2 Head Assembly - Valve Units
fig. 20