Hf series – General Pump HF Repair Manual User 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