Giant GP7522GB, Operating Instructions/ Repair And Service Manual

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7
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.
GP7522GB REPAIR INSTRUCTIONS
1) Loosen and remove screws
(58C) with a 24mm socket
wrench.
3) Remove the compression
spring (57) O-Ring (58A)
and support ring (58B).
58B 58A 57
51C (Suction)
52C (Discharge)
TO CHECK VALVES
2) Take plugs (58) out of valve
casing (50) by tightening
screws (58C) against valve
casing with two screws.
4) Take out valve assemblies
(52 & 51) using either tool
(part #07662) or a stud bolt.
5) Valve seats (51C and 52C) are pressed out of spacer pipes
(51F and 52F) by hitting the valve plates (51D and 52D) with a
socket extention.
6) Check surfaces of valve plates (51D and 52D), valve
seats (51C or 52C) and o-rings (51B and 52B).
Replace worn parts.
51E/52E 51D/52D 51C/52C 51B/52B
CAUTION: Don’t loosen the 3 plunger (36) before the valve casing has been removed otherwise the
plunger (36) could hit against the spacer pipe (51F) when the pump is being turned.