General Pump LH - Manual (Page 12)

GENERAL PUMP
A member of the Interpump Group
LH 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.
For inspecting the pumping unit, remove the head by
loosening the eight head screws (1, Fig. 16).
Remove the upper cover by loosening the four screws
(1, Fig. 17).
Loosen and remove the plunger screws (1, Fig. 18).
Push the plungers forward by rotating the crankshaft,
then introduce our tool p/n F200030060 (or equivalent)
(1, Fig. 19) in between the piston guide and the cylinder.
With the tool in place, rotate the crankshaft until the
cylinder is pushed out together with the plungers
(Fig. 23). Repeat the operation for each pumping unit.