Instructions - Parts
Old Seal Kits
312348B
To replace proportioning pump piston seal sets or cylinder seal sets used on Gusmer and
Old Graco H-25 and H-XP2 Hydraulic Proportioners.
Important Safety Instructions
Read all warnings and instructions in proportioning
pump manual 311391. Save these instructions.
Piston Seal Kits, see page 2
Cylinder Seal Kits for A-Side Pumps, see page 2
Cylinder Seal Kits for B-Side Pumps, see page 4
Seal Kit Installation, see page 5
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Cylinder Seal Kits for A-Side Pumps
Parts with a checkmark (✓) in the following table
are included in the kits.
Before beginning, follow the Pressure Relief Proce-
dure in proportioning pump manual 311391.
A
* E
(Outlet
Flange)
* F
* G
Proportioning Kit Part
C
D
(Cylinder
Seal)
(Retainer (Adapter
Flange)
Pump Size
No.
(Gasket) (Bearing)
Ring)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
40
60
80
261724
261730
261733
297871
261754
298010
295064
295066
296803
295069
295070
295072
295159
295159
295159
295159
295159
295159
295243
295244
295245
295247
295248
96
104
120
* Not included in kit.
G
D
A
E
F
C
FIG. 3: Cylinder Seal Kit for A-Side Pumps
312348B
3
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Cylinder Seal Kits for B-Side Pumps
Parts with a checkmark (✓) in the following table
are included in the kits.
Before beginning, follow the Pressure Relief Proce-
dure in proportioning pump manual 311391.
A
B
* E
(Outlet
Flange)
* F
(Retainer
Flange)
Proportioning
Pump Size
Kit Part
No.
C
(Cylinder
Seal)
(Grease
Bushing)
(Gasket)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
28
40
48
261757
261725
261728
261731
261734
261755
261735
295142
295064
295065
295066
296803
295070
295072
295074
295076
295078
295079
295080
295083
295085
60
80
104
120
* Not included in kit.
F
C
B
A
E
FIG. 4: Cylinder Seal Kit for B-Side Pumps
4
312348B
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Piston Kit Installation
1. Install piston rod seal; ensure u-cup faces piston rod
Assemble back plate with the small bore facing the
seal.
TI9097a
FIG. 5: U-Cup Orientation
TI9099a
FIG. 7: Seal Orientation
2. Assemble piston head to piston rod. Apply Loctite to
threads and torque piston head according to Table
1.
4. Ensure plate is parallel with block. Carefully tighten
screws until plate is flush with block. Be sure to
press seal straight into bore.
1
TI9098a
1
Apply Loctite to threads.
FIG. 6: Piston Head and Rod
Pump
28
Torque (ft-lbs)
10
TI9111a
TI9109a
22
22
22
38
38
38
38
55
40
44
Seal Alignment
Pressed Seal
48
FIG. 8: Seal Alignment
60
80
96
104
120
Table 1: Torque Specification
3. Press throat seal into block using back plate and
supplied screws. Ensure u-cup faces cylinder.
312348B
5
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5. Softly tap seal into bore until it bottoms out.
TI9103a
FIG. 11: Assemble Gasket and Back Plate
TI9100a
FIG. 9: Tap Seal
8. Assemble throat seal installation tool on to end of
piston rod.
6. Insert bushing into bore; make sure larger outside
diameter faces seal and smaller outside diameter
faces plate.
Clevis end of piston rod may need to be removed to
perform this step.
Grease Hole
TI9102a
ISO Throat Bushing
Resin Throat Bushing
Installation Tool
TI9104a
FIG. 12: Throat Seal Installation Tool
TI9101a
FIG. 10: Insert Bushing
9. Insert piston rod and seal tool through throat seal on
front of block.
7. Assemble gasket and back plate to block using sup-
plied screws.
For A-side pumps that are 80 or smaller, a plate
adapter is required.
TI9105a
FIG. 13: Insert Rod through Throat Seal
6
312348B
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10. Place assembly on a spacer, such as a two inch
wide roll of tape, and tap piston rod through throat
seal and bearing.
CAUTION
Keep rod straight to prevent damage to throat seal.
Cylinder Assembly
TI9107a
TI9106a
FIG. 14: Tap Piston Rod
careful to not score piston seal. Continue tapping
cylinder until it seats in bore of block.
Use grease to aid in insertion of piston rod into cyl-
inder.
Seat Cylinder in Bore
TI9108a
FIG. 15: Tap Cylinder onto Piston Rod
12. Once cylinder is seated in bore, remove two socket
head set screws from block and plate assembly.
13. Assemble cylinder and block assembly to remaining
pump components. See Proportioning Pumps man-
ual 311391 for instructions.
312348B
7
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Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Information
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
This manual contains English. MM 312348
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
Copyright 2007, Graco Inc. is registered to I.S. EN ISO 9001
Revised 7/2008
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