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10

8)  Take out the seal case (38) from the valve (if 

necessary secure 2 screwdrivers in the front O-ring 

groove to extract seal casing  from valve casing). 

Coat seals with silicon grease before installing.

 Mounting surfaces of the crankcase 

and the valve casing must be clean and free of 

damage.  The components must fit exactly and 

evenly on one another.  The same exactness ap

-

plies for all centering positions in the crankcase, 

pressure and valve casing.

 7)  

 Be careful not to damage the seal 

sleeve (39) and pressure ring (41).  Check the inner                       

diameter of the pressure ring for wear and if neces

-

sary replace together with seals (40) and (42). Clean 

all parts. New parts should be lightly coated with 

silicon grease before installation.  Inert the seal unit 

(40, 41, 42 43) into the sleeve.  Push the ceramic 

plunger carefully through the seals from the crank

-

case side.  If necessary, the seals can be held tightly 

using a suitable pipe support held on the opposite 

side of the seal sleeve.

9)  Lightly coat the seal sleeve with anti-corrosive 

grease (e.g. molycote no. Cu-7439) in its fitted area 

towards the crankcase.  Insert the seal sleeves in to 

their crankcase fittings.  Lightly coat the threads of 

the tension screw (36C)  with thread glue and insert 

it together with a new copper ring (36D) through 

the ceramic pipe.  Turn the pump by hand until the 

plunger (25) rests against the plunger pipe.  Tighten 

the tension screw at 30 Ft-lbs. (40 Nm).

 Thread glue must never come between 

the plunger pipe (36B) and centering sleeve (36E). 

Overtensioning of the plunger pipe by excessive 

tightening of the tension screw and/or dirt or damage 

on the mounting surfaces can lead to plunger pipe 

breakage. Insert the seal tension spring (45) and O-

ring (39A) in to the seal sleeve (39). 

 

Replacing Valve Casing:

10) Put seal cases (38) in the centering holes of the 

valve casing, then push valve casing carefully on to 

centering studs (50A). Tighten hexagon screws (49A) 

evenly and crosswise at 266 Ft.-lbs. (360 Nm).

 

  The torque tension on the screws 

(49A) must be checked after 8-10 operating hours; 

the pump must be at zero pressure.  Thereafter, 

the  tension  is  to  be  checked  every  200  operating 

hours.

GP8055(-1000)/GP8060(-1000)/GP8065(-1000)

PUMP REPAIR INSTRUCTIONS

Summary of Contents for GP8055

Page 1: ...ages 6 7 Repair Kits Tool List Torque Specifications page 8 Troubleshooting Chart page 8 Repair Instructions pages 9 11 Dimensions back page Warranty Information back page Triplex Ceramic Plunger Pump...

Page 2: ...lar advantage where INSTALLATION INSTRUCTIONS continuous operation is involved The pump can also be run against the recommended direction of rotation if operated periodically or at reduced pressure If...

Page 3: ...system contact Giant Specifications Models GP8055 GP8055 1000 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified above H...

Page 4: ...system contact Giant Specifications Model GP8060 GP8060 1000 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified above H...

Page 5: ...ing system contact Giant Specifications Model GP8065 GP8065 1000 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified abov...

Page 6: ...6 Exploded View GP8055 1000 GP8060 1000 GP8065 1000...

Page 7: ...9 17422 Add optional extended dip stick assembly sold separately Item Part Description Qty 43 05278 Sleeve Support Ring GP8055 3 43 05070 Sleeve Support Ring GP8060 3 43 05118 Sleeve Support Ring GP80...

Page 8: ...NM TOOL NEEDED 17 05038 Hexagon Socket Screw 64 87 10mm allen wrench 24 05047 Connecting Rod Hexagon Socket Screw 37 50 8mm allen wrench 33B 05054 Clip Ring n a Industrial Snap ring pliers 36C 05062...

Page 9: ...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 c...

Page 10: ...eve with anti corrosive grease e g molycote no Cu 7439 in its fitted area towards the crankcase Insert the seal sleeves in to their crankcase fittings Lightly coat the threads of the tension screw 36C...

Page 11: ...ghten the screws 17 at 64 Ft lbs 87 Nm Seal 32A must always be installed so that the seal lip on the inside diameter faces the oil Possible axial float of the seal adaptor 33 is compensated with shims...

Page 12: ...roduct as a component part 5 Changes or modifications made by the customer or third party 6 The operation of pumps and or accessories exceeding the specifications set forth in the Operations Manuals p...

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