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GP8055/GP8060/GP8065 PUMP REPAIR INSTRUCTIONS
6) Remove tension screw (36C) and take
seal sleeve (39) together with all mounted
parts out of the drive. Pull plunger pipe out
of the seal assembly and check for any
damage. Carefully, remove seal rings (40)
and sleeves (42) with a screw driver.
4) The spring tension cap (51A, 52A) is
screwed together with the valve seat (51B or
52B). Screw off spring tension cap. Takeout
springs (51E, 52E) and valve plate (51C, 52C).
Check sealing surfaces and O-rings (51D,
52D). Replace worn parts. Coat threads of
valve seat with silicon grease or molycote anti-
seize Cu-7439 when reassembling. Before
refitting the valves, clean the sealing surfaces
in the casing and check for any damage.
Tighten caps (58) at 133 Ft-lbs; check torque
tension after 8-10 operating hours.
5) Remove hexagon nuts (49A) and
valve casing together with seal case
(38) from crankcase (1). If neces-
sary, carefully tap the valve casing
(50) past the centering stud (50A)
using a rubber hammer.
IMPORTANT! If necessary, support
the valve casing by resting it on
wooden blocks or by using a pulley.
Valve Inspection and Repair
1) Remove bolts (58). 2) Remove discharge
casing (50B) up and away.
3) Take out pressure springs
(57A). Pull out assembled
valves (51 & 52) with fitting tool.
To Check Seals and Plunger Pipe
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