Page 1
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
Page 2
Piston Seal Kits for A-Side and 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.
Proportioning
Pump Size
28 261756
40 261726
44 297845
48 261729
60 261732
80 298013
96 297848
104 261753
120 298011
B
A
Kit
Part No.
C
Seal Wiper
D
A
(Piston
Ring)
B
(Wear
Ring)
C
(Piston
Seal
Support)
D
(Piston
Seal)
✔✔
✔✔
✔✔✔✔
✔✔
✔✔
✔✔
✔✔✔✔
✔✔
✔✔
E
C
E
(Piston
Support
Washer)
297184 1
295279 1
A
Fig.
2
2
2
2
2
2
2
1
1
Apply Loctite to threads and
1
FIG. 1: Piston Seal Kit
2 312348B
torque; see Table 1 for correct
torque measurement.
FIG. 2: Piston Seal Kit
1
Apply Loctite to threads.
TI8048a
Page 3
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.
Proportioning
Pump Size
40 261724
60 261730
80 261733
96 297871
104 261754
120 298010
* Not included in kit.
Kit Part
No.
E
A
(Cylinder
Seal)
✔✔✔
✔✔✔
✔✔✔
✔✔✔
✔✔✔
✔✔✔
A
C
(Gasket)D(Bearing)
D
G
* E
(Outlet
Flange)
295064 295159 295243
295066 295159 295244
296803 295159 295245
295069 295159 295247
295070 295159 295248
295072 295159
* F
(Retainer
Flange)
* G
(Adapter
Ring)
F
C
FIG. 3: Cylinder Seal Kit for A-Side Pumps
312348B 3
Page 4
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.
Proportioning
Pump Size
28 261757
40 261725
48 261728
60 261731
80 261734
104 261755
120 261735
* Not included in kit.
Kit Part
No.
A
(Cylinder
Seal)
✔✔✔
✔✔✔
✔✔✔
✔✔✔
✔✔✔
✔✔✔
✔✔✔
E
B
(Grease
Bushing)
A
(Gasket)
B
C
F
C
* E
(Outlet
Flange)
295142 295074
295064 295076
295065 295078
295066 295079
296803 295080
295070 295083
295072 295085
* F
(Retainer
Flange)
FIG. 4: Cylinder Seal Kit for B-Side Pumps
4 312348B
Page 5
Piston Kit Installation
1. Install piston rod seal; ensure u-cup faces piston rod
as shown in F
F
IG. 5: U-Cup Orientation
IG. 5.
TI9097a
2. Assemble piston head to piston rod. Apply Loctite to
threads and torque piston head according to Table
1.
1
Assemble back plate with the small bore facing the
seal.
TI9099a
FIG. 7: Seal Orientation
4. Ensure plate is parallel with block. Carefully tighten
screws until plate is flush with block. Be sure to
press seal straight into bore.
TI9098a
1
Apply Loctite to threads.
F
IG. 6: Piston Head and Rod
Pump Torque (ft-lbs)
28
40
44
48
60
80
96
104
120
10
22
22
22
38
38
38
38
55
Table 1: Torque Specification
3. Press throat seal into block using back plate and
supplied screws. Ensure u-cup faces cylinder.
Seal Alignment
IG. 8: Seal Alignment
F
TI9109a
TI9111a
Pressed Seal
312348B 5
Page 6
5. Softly tap seal into bore until it bottoms out.
TI9100a
IG. 9: Tap Seal
F
TI9103a
FIG. 11: Assemble Gasket and Back Plate
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.
Grease Hole
TI9102a
ISO Throat Bushing
IG. 10: Insert Bushing
F
Resin Throat Bushing
TI9101a
7. Assemble gasket and back plate to block using supplied screws.
Clevis end of piston rod may need to be removed to
perform this step.
Installation Tool
TI9104a
F
IG. 12: Throat Seal Installation Tool
9. Insert piston rod and seal tool through throat seal on
front of block.
For A-side pumps that are 80 or smaller, a plate
adapter is required.
TI9105a
F
IG. 13: Insert Rod through Throat Seal
6 312348B
Page 7
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.
TI9106a
F
IG. 14: Tap Piston Rod
11. Tap cylinder onto piston rod as shown in F
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 cylinder.
IG. 15. Be
Cylinder Assembly
TI9107a
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 manual 311391 for instructions.
312348B 7
Page 8
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
www.graco.com
Revised 7/2008
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