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14)
Remove circlip ring
(48) from seal sleeve
(38). Remove spacer
disc (47) and seal ring
(46) from seal sleeve.
Replace worn or dam-
aged parts.
16)
Remove support disc (41) seal unit (42, 43, 44) and pressure ring (45) of seal sleeve
(38). Examine seals for signs of wear or cavitation, and if necessary, replace.
36
17) Examine plunger surface (36)
for signs of wear or cavitation.
When exchanging worn plunger,
attention must be paid, so that the
center bore and front surface of the
crosshead (25) are free of dirt and
damage. When reinstalling, thread
plunger carefully through oiled seals
in seal sleeve (38). Coat thread of
new plunger lightly with bonding
agent (e.g., loctite).
GP7122 REPAIR INSTRUCTIONS
48
47
15) Remove leakage gasket (38B) from serrated pin (38A)
on the seal sleave (38). Check o-ring (38C) for damage
and replace if necessary. IMPORTANT! The 3.2 mm
(diameter bore of the leakage gasket (38B) must be
inserted directly on the serated pin (38A) of the seal
sleeve (38). The leakage gasket must fit snugly to the
seal so that the bevelled surface of the gasket faces
outwards.
45
44
43
33B
13
46
38
42
43
42
NOTE:
Seal life can be increased
if the pretensioning allows
for a little leakage. This
assists lubrication and
keeps the seals cool. It is
therefore not necessary
to replace seals before
the leakage becomes too
heavy and causes output
and operating pressure to
drop.
38A
38C
38B
41
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