General Pump KL - Manual (Page 12)

GENERAL PUMP
A member of the Interpump Group
KL SERIES
Page 12
11.3 Pumping unit maintenance
The only maintenance operation required for the pumping
unit is to periodically check the amount of water
drained out by the pump through the hole
provided in the lower cover (Fig 6, page 9).
It clearly shows the pressure packing state
of wear; replace them if water dripping
becomes continuous and not intermittent.
In order to check for the pumping units, separate the
complete fluid end from the pump by removing the four
bolts (1, Fig. 16).
Remove the plunger screws (1, Fig. 17).
Once fluid end and plunger screws are removed,
cylinders and plungers are free to slide out without any
other operation (Fig. 18). Check the state of wear of the
parts and replace where necessary. Every o-ring should
be replaced at every inspection.
Replace pressure packings every time the fluid end
is disassembled. The operation can be carried out with
simple tools or by hand as well (Fig 19).
When reassembling make sure of the correct order of
the entire package made up of the following components
(Fig. 20):
1. Spacer
2. Packing ring
3. Pressure packing (two pieces)
A little bit of grease helps when sliding the pressure
packings into the fluid end. Fit the plunger back in place
without tightening the plunger screw. Fit the cylinder
back in place and then tighten the plunger screw with a
torque wrench set for 50.6 ft. lbs.
Fit the fluid end back in place and
tighten the four bolts (1, Fig 16) with a
torque wrench set for 133.8 ft. lbs.