General Pump MK Repair Manual - Manual (Page 33)

GENERAL PUMP
A member of the Interpump Group
MK SERIES
Page 33
2.2.3 Disassembling the Plunger Unit - Supports - Seals
The plunger unit requires a periodical inspection as indicated in the preventive maintenance table of the
Owner’s Manual. Interventions only require visual inspections of the draining from the hole in the lower cover.
In case of anomolies/oscillations on the delivery pressure gauge, or leaking from the drain hole, proceed with
seal inspection and replacement if necessary.
Operate as follows to extract the plunger units:
To access the plunger unit, unscrew the M16 x 180 screws and disassemble the head.
Remove the head with great care in order to avoid bumping against the plungers.
Disassemble the plungers by unfastening the screws (1, fig. 111).
Remove the plunger from the packing support and check that there are no scratches, or signs of wear or
cavitation.
Remove the upper inspection cover by unscrewing the 4 fastening screws (1, fig. 112).