Giant GP7122, Operating Instructions Manual

13

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.

GP7122 REPAIR INSTRUCTIONS

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.

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.

       48          47        46 

38 

38C 

38B 

36 

33B 

38A

 45  44 43 42  43  42 41   

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.

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).