General Pump KS Repair Manual - Manual (Page 17)

GENERAL PUMP
A member of the Interpump Group
KS SERIES
2.2.4 Plunger unit disassembly
The plunger unit does not require periodical maintenance. Service interventions are limited to visual inspec-
tions only. For plunger unit extraction, operate as follows:
Unfasten the M7x1 plunger screws as shown in fig. 41.
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Check for wear; replace them if necessary.
At each disassembly, all the o-rings of the
plunger unit must be replaced (1, fig. 42).
Ref 300902 Rev.A
07-12