General Pump HF Owner Manual - Manual (Page 18)

Page 18
GENERAL PUMP
A member of the Interpump Group
HF SERIES
11.2.4 Fluid End
In order to mount the fluid end on the pump proceed
as follows:
A) Fit the packing supports back in place in the
crankcase.
B) Fit the pressure packings back in place in the pump
head.
C) Using two stud bolts (min. length: 200 mm) and the
central plunger as a guide carefully slide to head in
position against the crankcase.
D) Tighten the head bolts with a torque wrench set as
indicated in the chart to the right.
12. TORQUE SPECIFICATIONS
The following table contains the screw
tightening torque values, to be set by
means of a torque wrench only:
13. MAINTENANCE TOOLS
Standard tools are required for the pump maintenance
but to facilitate the mounting and dismounting operations
of some pump components, you will find the drawings
to make some tools on page 23.
DESCRIPTION Ft. Lbs. N-m Kgm.
Rear cover
screws
7.3 10 1
Plunger Bolts 14.7 20 2
Connecting Rod
Screws
28 38* 4
Valve Plate
Screws
88.5 120** 12
Fluid End Bolts 59 80*** 8
Auxiliary Plug 29.5 40 4
* The conrod screws must be tightened as
indicated in point D, page 13.
** The valve plate must be tightened following
the sequence indicated in fig. 28.
*** The fluid end screws must be tightened in 2
stages following the sequence indicated in
fig 24:
First stage: 20 N-m
Second Stage: 80 N-m