7
GP7532GB REPAIR INSTRUCTIONS
NOTE:
Always take time to lubricate all metal and non-metal parts with a light film of oil
before reassembling. This step will help ensure proper fit, at the same time
protecting the pump non-metal parts (elastomers) from cutting and scoring.
1.
Loosen screws (58C),
take plugs (58) out of
valve casing with two
screws.
2.
Take out tension spring
(57) and complete
valve (51) using ei
-
ther valve tool (part
#07662) or stud bolt
M16.
3.
Valve seats (51C and
52C) are pressed out
of spacer pipe (51F) by
hitting the valve plate
(51D/52D) with a bolt.
4.
Check surfaces of valve plate (51D/52D), valve seat
(51C/52C), O-rings (51B, 58A), and support rings (51A,
58B) and replace worn parts.
5.
When reassembling:
The suction valve seat
(51C) is 1mm smaller in
diameter than the dis-
charge valve seat (52C).
Suction valve seats are
marked “S” and always
have to be installed first.
Discharge valve seats
are marked “P” and are
always tobe installed
on top of suction valve.
Plugs (58) are to be
tensioned down evenly
with screws (58C) in a
crosswise pattern at 155
ft-lbs. (210 Nm).
51F
51E/52E 51D/ 51B/52B
51A/
51C/52C
52D
52A
P
S
6.
Loosen nuts (49A)
7.
Remove pump head.
