General Pump KF Repair Manual - Manual (Page 12)

GENERAL PUMP
A member of the Interpump Group
KF 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:
A) Unfasten the M7x1 plunger screws as shown in fig. 20.
Check for wear; replace them if necessary.
At each disassembly, all the o-rings of the plunger unit must be replaced (1, fig. 42).
2.2.5 Head assembly - seals - plunger unit
Reassemble the various components by inverting the previously listed operations as indicated in paragraph
2.2.3, paying particular attention to the following:
A) The sealing packs: respect the same order of disassembly.
B) Lubricate the components (2,3 and 5) with OCILIS type silicone grease part #F12001600; this
operation is also considered necessary to facilitate the settling of the sealing lips on the plunger.
C) For correctly assembling the HP seals in their related seats on the head without damaging the lips, use the
appropriate tools depending on the pumping assembly diameters as indicated in Chapter 4.
D) Reassemble the plungers by fastening the screws with an appropriate torque wrench, respecting the
fastening torque value indicated in Chapter 3.
E) Assemble the head: for fastening torque values and fastening sequences, respect the indications of
Chapter 3.
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Ref 300917 Rev.A
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