General Pump MK Repair Manual - Manual (Page 37)

GENERAL PUMP
A member of the Interpump Group
MK SERIES
Replace the pressure packings by applying a small amount of silicone grease to the
lips, being careful not to damage them when inserting the liner.
At each disassembly, the pressure packings must always be replaced together with all
the O-rings.
Insert the low pressure packings in the packing support (1, fig 124), being careful that the sealing lips are
facing frontwards (toward the head).
Assemble the head ring (1, fig. 125), the high pressure packing (1, fig. 126) and the restop ring
(1, fig. 127).
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Couple the packing support to the liner (1, fig. 128).
2.2.4 Assembly of the Plunger Unit - Support - Seals
Proceed with reassembly by inverting the disassembly procedure indicated in paragraph 2.2.3.