9
GP8055(-1000)/GP8060(-1000)/GP8065(-1000)
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). Remove spring tension cap. Take-
out springs (51E, 52E) and valve plate (51C,
52C). Check sealing surfaces and O-rings
(51D, 52D). Replace worn parts. When
reassembling, coat threads of valve seat with
silicon grease or molycote anti-seize Cu-7439.
Before refitting the valves, clean the seal-
ing surfaces in the casing and check for any
damage. Tighten bolts (58) to 133 Ft-lbs (180
Nm); 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, sup
-
port 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 valve pull-
ing tool (07662).
To Check Seals and Plunger Pipe
