General Pump SM Repair Manual - Manual (Page 29)

GENERAL PUMP
A member of the Interpump Group
SM SERIES
Page 29
Remove the M10x140 head liner fixing screws (1, fig. 100) and remove the liner units (1, fig. 101).
During assembly of the liners, take care not to disperse the valve springs and the flat
valves (1 and 2, fig. 102) as, not being locked, they could fall.
If the valve housings should become blocked on the head due to the forming of limestone
or oxide, they must be unblocked by inserting a special tool part #F034300020 in the
outlet hole.
Ref 300894 Rev.A
06-12