Alemite 7786-A5 User manual

Service Guide
SER 7786-A5
Alemite, LLC
167 Roweland Drive, Johnson City, Tennessee 37601
www.alemite.com
Copyright © 2006 by Alemite, LLC
This document contains confidential information that is the property of Alemite, LLC
396910 and is not to be copied, used, or disclosed to others without express written permission. Revision (1-13)
7786-A5
7786-C
7786-MA
Specifications
Air Motor
Pump Tube
Pump
Model
Air Inlet Max.
Air Pressure
Body Adapter psi bar
7786-A5, -C 3/4" NPTF Not Applicable 100 6.9
7786-MA 3/4" BSPP (f) x 3/4" NPTF (m)
For additional specifications, refer to Service Guide SER 323440-4
Pump Model Material Outlet Adapter
Max.
Material Pressure
Delivery/Min.
(Approximate) **
Displacement
per Cycle
psi bar lbs. kg in 3cm 3
7786-A5 and 7786-C 1/2 " NPTF (f) x 1/2 " NPTF (m) 7500 517 12.5 5.7 1.36 22.3
7786-MA 1/2 " BSPP (f) x 1/2 " NPTF (m)
** For detailed information, refer to Figure 3
Table 1 High-Pressure Pump Model 7786 Series Specifications
Figure 1High-Pressure Pump Model 7786 Series
Model 7786-A5 Shown
Description
The major components of the pump models in the 7786 series
consist of an air-operated motor and a pump tube. The air motor
connects directly to the double-acting reciprocating pump tube.
These high-pressure non-divorced grease pumps (75:1 ratio)
are designed to deliver a range of greases (up to NLGI # 3) and
operate directly from their original drums or bulk containers*.
Models 7786 Series Comparison
Each pump model is designed with a pump tube length to
accommodate different size containers. See Figure 1.
Model 7786-MA is equipped with an air inlet and a material
outlet adapter with BSPP threads. See Table 1.
* Pump model 7786-A5 is operated in various type systems,
Refer to the section entitled Alternate Installation (Page 12) for
details.
High-Pressure Grease Pump
Pump
Model
Container Size X Y
lbs kg Inches Cm Inches Cm
7786-A5 400 -
33-1/8 84 52-1/4 133
7786-MA * - 180
7786-C 120 - 25-5/8 65 44-3/4 114
* With BSPP Inlet and Outlet Adapters (See Tab le 1)

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 2 Alemite, LLC
Figure 2-A High-Pressure Grease Pump Model 7786 Series - Exploded View

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 3 Revision (1-13)
Repair Kits
Part No. Kit Symbol Description Notes
394747-1 Kit, Major Repair Includes items on Figure 2-A and 2-B
393040-1 Kit, Minor Repair (for Body and Seal Group)
393623 Kit, Minor Repair (for Pump Tube Assembly) Includes items on Figure 2-A and 2-B
393530-5 Kit, Seal [includes five (5) of item number 16]
393530-6 Kit, Seal [includes five (5) of item number 18]
Item
No. Part No. Description Qty Notes Numeric Order Part # (Item #)
1 323842 Bolt, Eye, 3/8 " NPTF (m) 1 10522 (6)
2 Motor Assembly, Air 1 See SER 323440-4 171009-13 (14)
3 328037 Connector, 3/4 " NPTF (m) 1
Model 7786-A5, -C
171009-33 (10)
4 328031 Coupler Air, 1/2 " NPTF (f) 1 171009-35 (11)
5 327706 Adapter, 1/2 " NPTF (f) 1 172190-5 (16)
6 10522 Plug, Pipe, 1/4 " NPTF (m) 1 172190-6 (18)
7 340120 Adapter, 1/2 " BSPP (f) x 1/2 " NPTF (m) 1 Model 7786-MA 323419 (8)
8 323419 Washer, 1.29 " OD 1 323440-4 (2)
9 324274 Bushing (Rubber) 1 323693 (21)
10 X171009-33 O-Ring, 1-13/16" ID x 2 " OD 1
Pack of Ten (10)
323786 (12)
11 X171009-35 O-Ring, 1-15/16" ID x 2-1/8 " OD 1 323787 (13)
12 323786 Body 1 323842 (1)
13 323787 Screw, Cap, Socket Head, 1/2 " - 13 3 324274 (9)
14 O-Ring, 1-3/16" ID x 1-5/16 " OD 1 327706 (5)
15 Spacer 1 328031 (4)
16 Seal, 0.812 " ID x 1.062 " OD 1 328037 (3)
17 Ring, Lantern (Brass) 1 332465 (22)
18 Seal, 0.812 " ID x 1.562 " OD 1 332466 (20)
19 337361 Washer, 1.55 " OD 1 333256 (23)
20 332466 Spacer 1 337361 (19)
21 323693 Gasket (Aluminum) 2 337362 (17)
22 332465 Washer, 1.93 " OD 1 337363 (15)
23 333256 Nut, Jam, 2.00 - 16 UN - 2B 1 340120 (7)
24 340122 Adapter, 3/4 " BSPP (f) x 3/4 " NPTF (m) 1 Model 7786-MA 340122 (24)
Legend:
Part numbers left blank (or in italics) are not available separately
designates a repair kit item

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 4 Alemite, LLC
Figure 2-B High-Pressure Grease Pump Model 7786 Series - Exploded View
® ™

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 5 Revision (1-13)
Item
No. Part No. Description Qty Notes Numeric Order Part # (Item #)
25 323439 Coupling 2 18850 (50)
26 324648 Clip, Spring 4 46584 (40)
27 323438-22 Rod, Pump Tube, 13.25 " Long 1 Model 7786-A5, -MA 131402 (29)
323438-23 Rod, Pump Tube, 5.75 " Long 1 Model 7786-C 131398-1 (48)
28 333257-1 Tube, Pump, 22.25 " Long 1 Model 7786-A5, MA 171032-8 (42)
333257-3 Tube, Pump, 14.75 " Long 1 Model 7786-C 172190-13 (46)
29 131402 Gasket, 1.68 " OD (Aluminum) 4 Qty 2 in Kit 172190-14 (32)
30 337461 Barrel Assembly 1 Includes Item 31 172270-9 (39)
31 337465 Ring, Wear (Glass-Reinforced Nylon) 1 319763 (37)
32 Seal, 0.925 " ID x 1.300 " OD 1 323438-22 (27)
33 337464 Ring, Back-Up 1 323438-23 (27)
34 337463 Bearing (Brass) 1 323439 (25)
35 337462 Spacer 1 323734 (49)
36 337466 Piston 1 323747-1 (44)
37 319763 Retainer 1 324648 (26)
38 327704 Spring, 1-1/2 " Long Straight 1 326852 (45)
39 Ball, 3/8 " Dia. 1 326856 (41)
40 46584 Gasket, 0.64 " OD (Aluminum) 1 327704 (38)
41 326856 Adapter 1 333085 (51)
42 171032-8 Pin, Roll, 3/32 Dia. x 11/16 " Long 1 333257-1 (28)
43 333343 Rod, Primer, 21/32 " Dia. x 7-3/16 " 1 333257-3 (28)
44 323747-1 Adapter 1 333343 (43)
45 326852 Washer, Guide 1 337461 (30)
46 Seal, 0.650 " ID x 0.990 " OD 1 337462 (35)
47 Body, Valve 1 337463 (34)
48 131398-1 Seat, Valve 1 337464 (33)
49 323734 Plate 1 337465 (31)
50 18850 Nut, Elastic Stop, 1/4 " - 28 1 337466 (36)
51 333085 Body, Primer 1338422 (47)
Legend:
Part numbers left blank (or in italics) are not available separately
designates a repair kit item
Repair Kits
Part No. Kit Symbol Description Notes
394747-1 Kit, Major Repair Includes items on Figure 2-A and 2-B
393623 Kit, Minor Repair (for Pump Tube Assembly) Includes items on Figure 2-A and 2-B
394078 Kit, Minor Repair (for Lower Pump Tube Packing)
393530-13 Kit, Seal [includes five (5) of item number 46]
393530-14 Kit, Seal [includes five (5) of item number 32]

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 6 Alemite, LLC
Accessories
Performance Curves
A pump’s ability to deliver material is based on the pressure (psi/bar) and quantity (cfm/lpm) of air supplied
to the motor and the amount of material discharge [back] pressure to be overcome within the system.
This chart contains curves based on four different air pressures. The curves relate delivery in pounds
(kilograms) per minute (X axis) to air consumption in cubic feet (liters) per minute (right Y axis) and to material
discharge pressure in psi/bar (left Y axis).
Model Number Follower Cover Air Hose Material Hose Union Bung Adapter Muffler
7786-A5 338912 323847-4
317811-5 317882-7 321155
326750-B1 3241707786-C 338804 323800-4
7786-MA - - - - -
Table 2 Model 7786 Series Accessories
Figure 3 Delivery versus Discharge Pressure and Air Consumption

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 7 Revision (1-13)

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 8 Alemite, LLC
Overhaul
NOTE: Refer to Figure 2-A and 2-B for
component identification on all overhaul
procedures.
Prior to performing any maintenance procedure, the
following safety precautions must be observed. Personal
injury may occur.
WARNING
Do not use halogenated hydrocarbon sol-
vents such as methylene chloride or 1,1,1 trichlo-
roethane in this pump. An explosion can result
within an enclosed device capable of containing
pressure when aluminum and/or zinc-plated parts
in the pump come in contact with halogenated
hydrocarbon solvents.
Release all pressure within the system prior to
performing any overhaul procedure.
• Disconnect the air supply line from the pump
motor.
• Into an appropriate container, operate the
control valve to discharge remaining pressure
within the system.
Never point a control valve at any portion of your
body or another person. Accidental discharge of
pressure and/or material can result in injury.
Read each step of the instructions carefully. Make
sure a proper understanding is achieved before
proceeding.
Disassembly
Separate Pump Tube from Air Motor
1. Clamp the motor housing horizontally in a vise.
2. Loosen Jam Nut (23) that secures the Pump Tube
assembly to Air Motor Assembly (2).
CAUTION
Support the Pump Tube assembly during removal.
Damage to components can occur.
3. Unscrew Pump Tube (28) [with attached components]
from the Air Motor.
4. Pull on the Pump Tube to expose Coupling (25).
5. Remove upper Spring Clip (26) that secures the
Coupling to the air motor piston rod.
6. Unscrew the Coupling from the air motor piston rod.
• Rotate the entire Pump Tube assembly.
Pump Tube Upper Packing
7. Unscrew Adapter (5) from the Air Motor Assembly.
8. Remove Washer (8) and rubber Bushing (9).
9. Unscrew Cap Screws (13) that secure Body (12) to the
Air Motor.
• Do not remove the Cap Screws from the Body.
10. Remove the Body from the Air Motor.
• Use the Cap Screws as levers.
11. Position the Body on the bench with the larger diameter
facing upward.
12. Remove aluminum Gasket (21), Washer (22), and
additional Gasket (21) from the Body.
13. Remove Spacer (20), Washer (19), and Seal (18).
14. Remove Lantern Ring (17) with Seal (16), and
Spacer (15).
• Remove the Seal from the Lantern Ring.
15. Remove O-Ring (14), O-Ring (10), and O-Ring (11)
from the Body.
Pump Tube
16. Clamp the pump tube assembly at Adapter (44) securely
in a soft-jaw vise.
17. Unscrew and remove Pump Tube (28) from the Adapter.
18. Remove Spring Clips (26) that secure Pump Tube
Rod (27) to upper and lower Couplings (25).
19. Unscrew the Rod from both Couplings.
IMPORTANT: Should the pump contain the
obsolete piston (see Figure 5), and stall
properly, certain parts within the major repair
kit are discarded. If the new piston is required,
order Barrel Assembly (30) and Piston (36)
separately.
20. Remove Spring Clip (26) that secures Piston (36) to
lower Coupling (25).
21. Unscrew the Coupling from the Piston.
22. Remove Barrel Assembly (30) from the Piston.

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 9 Revision (1-13)
Clean and Inspect
NOTE: Use the appropriate repair kit for
replacement parts. Make sure all the compo-
nents are included in the kit before discard-
ing used parts.
1. Clean all metal parts in a modified petroleum-based
solvent. The solvent should be environmentally safe.
2. Inspect all parts for wear and/or damage.
• Replace as necessary.
3. Inspect Piston (36) and Primer Rod (43) closely. Use a
magnifying glass to detect any score marks.
• Replace as necessary.
4. Closely inspect the mating surfaces of all check valve
components for any imperfections Ensure a smooth
and clean contact is obtained when assembled.
Assembly
NOTE: Prior to assembly, certain compo-
nents require lubrication in clean oil. Refer
to Table 4 for details.
Pump Tube Upper Packing
NOTE: Refer to Figure 4 for a section view
of the upper packing components.
1. Install O-Ring (10) and O-Ring (11) onto Body (12).
2. Position the Body with the large diameter upward.
3. Install O-Ring (14) into the Body.
4. Install Spacer (15) into the Body.
• Make sure the Spacer centers and seats properly.
5. Install Seal (16) [lip end first] into Lantern Ring (17).
6. Install the Lantern Ring assembly into the Body.
• Make sure the assembly centers and seats properly.
7. Install and seat Seal (18) [heel end first] into the Body.
23. Remove both aluminum Gaskets (29).
24. Remove brass Bearing (34), Back-Up Ring (33), and
Seal (32) from the Barrel Assembly.
NOTE: Inspect the inside diameter of nylon
Wear Ring (31). Remove the Wear Ring if
rough or worn.
25. Remove Spacer (35) from top of Adapter (44).
26. Unscrew Primer Body (51) from the Adapter.
27. Remove the Primer Rod (with attached components)
from the bottom of the Adapter.
28. Remove Stop Nut (50) from Primer Rod (43).
• Support the Primer Rod through the hole as needed.
29. Remove Plate (49), Gasket (29), Valve Seat (48), and
additional Gasket (29) from the Primer Rod assembly.
CAUTION
Support the Piston and Primer Rod assembly dur-
ing Roll Pin (42) removal. Damage to components
can occur.
30. Remove Roll Pin (42) that secures Adapter and Insert
Assembly (41) to Primer Rod (43).
• Use a punch and a small hammer.
31. Unscrew Primer Rod from Adapter and Insert
Assembly.
32. Remove Valve Body (47) [with Seal] and Guide
Washer (45) from the upper end of the Primer Rod
assembly.
33. Remove Seal (46) from the Valve Body.
34. Unscrew the Adapter (41) from
Piston (36).
35. Remove aluminum Gasket (40), Ball (39), Spring (38),
and Retainer (37) from the Piston.
Item No.
on Figure 2-A Description Item No. on Figure 2-B Description
10 O-Ring, 1-13/16 " ID x 2 " OD 31 Ring, Wear (Glass-Reinforced Nylon)
11 O-Ring, 1-15/16 " ID x 2-1/8 " OD 32 Seal, 0.925 " ID x 1.300 " OD
14 O-Ring, 1-3/16 " ID x 1-5/16 " OD 46 Seal, 0.650 " ID x 0.990 " OD
16 Seal, 13/16 " ID x 1-1/16 " OD
18 Seal, 13/16 " ID x 1-9/16 " OD
Table 4 Components Lubricated in Clean Oil

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 10 Alemite, LLC
CAUTION
Do not place Washer (19) inside Spacer (20). Dam-
age to components will occur.
8. Install Washer (19) and Spacer (20) into the Body.
9. Lubricate the air motor piston rod with grease.
10. Install the Body assembly (while holding the Spacer in
place) onto the piston rod.
• Use a small hammer or other suitable tool.
11. Rotate the Body to align the product outlet with the
hole in the air motor housing.
NOTE: Refer to Figure 2-A for
steps 12 and 13.
12. Install Washer (8) and Bushing (9) onto Adapter
(5).
13. Install the Adapter assembly (w/ thread sealant) into
the Body.
• Do not tighten the Adapter at this time.
14. Install Cap Screws (13) that secure the Body to the air
motor.
• Tighten each Cap Screw securely.
15. Tighten the Adapter assembly into the Body.
Steps for Model 7786-MA Only
16. Install Adapter (7) [w/ thread sealant] into Adapter
(5) as required.
• Tighten the Adapter securely.
17. Install Adapter (24) [w/ thread sealant] into Air Motor
Assembly (2) as required.
• Tighten the Adapter securely.
18. Install aluminum Gasket (21), Washer (22), and
additional Gasket (21) into the Body.
• Make sure the components maintain their position.
Figure 4 Pump Tube Upper Packing - Section View

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 11 Revision (1-13)
Pump Tube
NOTE: Refer to Figure 5 for section view
of pump tube components.
19. Clamp the flats of Piston (36) into a soft-jaw vise.
• Make sure the Piston bore points upward.
20. Install Retainer (37) [flange end first] into the Piston.
• Make sure the Retainer centers and seats properly.
21. Install Spring (38) into the Piston.
22. Install Ball (39) into the Spring.
23. Install Gasket (40) onto Adapter and Insert
Assembly (41).
24. Screw the Adapter (41) (with Loctite 222 ) into
Piston. See Figure 2-B.
• Follow the thread sealant manufacturer’s
recommendations.
• Tighten securely.
25. Install and seat Seal (46) [heel end first] into Valve
Body (47).
26. Lubricate Primer Rod (43) with grease.
27. Install the Valve Body assembly onto the upper end of
the Primer Rod.
• Use a small hammer or other suitable tool.
28. Install Guide Washer (45) onto the Primer Rod.
29. Screw the Primer Rod assembly into the Adapter until
the roll pin holes align.
CAUTION
Support the Primer Rod and the Adapter during
Roll Pin (42) installation. Damage to components
can occur.
30. Install Roll Pin (42) that secures the Primer Rod to the
Adapter.
• Use a small hammer.
31. Install Valve Seat (48), Plate (49), and Stop Nut (50)
onto the Primer Rod.
• Tighten the Stop Nut securely.
• Place a small punch into the hole of the Primer Rod
to prevent its rotation. See Figure 2-B.
32. Position Adapter (44) horizontally into the vise.
Figure 5 Pump Tube Assembly - Section View
Refer to Figure 2-B
Parts List
for Parts Identification
®™ the

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 12 Alemite, LLC
Internally-Threaded End of Adapter
33. Install Gasket (29) into the internally-threaded end of
the Adapter.
34. Install the Primer Rod and Piston assembly
(Piston end first) into the Adapter.
• Center and seat all components properly. Pull on the
Piston as necessary. Use care to ensure the Gasket
does not move.
35. Install the additional Gasket (29) onto Valve Seat (48).
Externally-Threaded End of Adapter
36. Install Spacer (35) into the externally-threaded end of
the Adapter.
• Make sure the Spacer centers and seats properly.
37. Position Barrel Assembly (30) with the large diameter
pointing upward.
38. Install Wear Ring (31) into the Barrel Assembly.
39. Install and seat Seal (32) [lip end first] into the Barrel
Assembly.
40. Install Back-Up Ring (33) and brass Bearing (34) into
the Barrel Assembly.
41. Install Gasket (29) onto the Adapter.
CAUTION
Use care installing the Barrel Assembly over the
threads of Piston (36). Damage to the Seal can
occur.
42. Install the Barrel Assembly (large diameter first) onto
Piston (36).
• Make sure the Barrel Assembly seats properly
against the Spacer.
43. Install Gasket (29) onto the Barrel Assembly.
44. Screw the upper and lower Couplings (25) onto each
end of Pump Tube Rod (27) until the Spring Clip holes
align.
45. Install Spring Clips (26).
46. Screw the Rod and Coupling assembly onto the Piston.
• Install the Spring Clip.
IMPORTANT: If a primer is used with
Loctite 222, the curing time is greatly
reduced.
47. Screw Pump Tube (28) onto Adapter (44)
[with Loctite 222]. See Figure 2-B.
• Do not tighten.
48. Screw Primer Body (51) [with Loctite 222] into the
opposite end of the Adapter. See Figure 2-B.
• Do not tighten.
49. Screw Jam Nut (23) onto the Pump Tube.
50. Push on Plate (49) to expose Coupling (25) from the
Pump Tube as necessary.
Attach Pump Tube to Air Motor
51. Screw the Coupling onto the air motor piston rod until
the Spring Clip holes align.
• Rotate the entire pump tube assembly.
52. Install the Spring Clip.
53. Screw the pump tube assembly into Body (12).
54. Place a large wrench or other suitable tool into the slot
of Primer Body (51).
• Tighten all the components of the assembly securely.
Crush all gaskets.
55. Tighten Jam Nut (23).
Operation
Bench Test and Prime
NOTE: Perform the following procedures at
a pressure not to exceed 20 psi (1.4 Bars).
1. Make sure air pressure at the regulator reads zero.
2. Connect a product hose to the pump’s material outlet.
3. Place the hose into an appropriate collection container.
4. Install air Connector (3) to the inlet of the air motor.
5. Connect Air Coupler (4) to the Connector.
6. Slowly supply air pressure to the pump’s motor.
• The pump assembly should cycle.
If the pump assembly does not cycle, refer to the
Troubleshooting Chart for details.

High-Pressure Grease Pump SER 7786-A5
Alemite, LLC 13 Revision (1-13)
Priming
With air pressure at zero:
7. Place the pump in the product to be dispensed.
8. Slowly supply air pressure to the pump’s motor.
9. Allow the pump to cycle slowly until the system and
product is free of air.
If the pump assembly does not prime, refer to the
Troubleshooting Chart for details.
Stall Test
WARNING
Should leakage occur anywhere within the
system, disconnect air to the motor. Personal
injury can occur.
With air pressure at zero:
10. Attach a control valve to the outlet hose of the pump.
11. Set the air pressure to 100 psi (6.9 Bar).
12. Operate the control valve into a container.
13. Allow the pump to cycle until the system and product
is once again free of air.
14. Shut off the control valve.
• The pump should not cycle.
15. Check the motor for air leakage.
If the motor leaks, refer to the Air Motor Service
Guide for details.
If the pump cycles slowly (once or twice an hour) or
continuously, refer to the Troubleshooting Chart for
details.
Installation
Additional items that should be incorporated into the
air piping systems are listed in Table 5.
* Although the air motor is lubricated at the factory,
the life of the motor can be extended with the use of a
lubricator.
Alternate Installations
Pump model 7786-A5 is often mounted:
• from either a single- or dual-post hoist
• in bulk grease distribution systems
When either of these type arrangements are employed,
alternate accessory items must be purchased. See Tabl e 6 .
Part Number Description
338862 Moisture Separator/Regulator & Gauge Combination
5608-2 Moisture Separator
7608-B Regulator and Gauge
5908-2 Lubricator *
Tab le 5 Air Line Components
Application Followers Adapter Kit Primer Body
Single-Post Hoist 327242
327247
Dual-Post Hoist 327690
Bulk Grease 333693*
* 1-1/2 " NPTF (m)
Table 6 Accessory Items for Alternate Installations

SER 7786-A5 High-Pressure Grease Pump
Revision (1-13) 14 Alemite, LLC
Troubleshooting Chart
Pump Indications Possible Problems Solution
Pump does not cycle 1. Air motor not operating properly
2. Pump tube jammed and/or contains
loose components
3. Insufficient air pressure
1. Inspect air motor and rebuild or
replace as necessary
2. Rebuild pump tube
3. Increase air pressure
Pump will not prime 1. Excessive cycling speed
2. Pump leaking internally
1. Reduce air pressure
2. See Internal Leaks
Pump cycles rapidly Product source empty Replenish product
Pump cycles continuously, or
slowly (once or twice/hour)
1. Pump leaking internally
2. Pump leaking externally
3. Distribution system leaking
1. See Internal Leaks
2. See External Leaks
3. Correct leak
External Leaks
Product leakage visible at weep
hole in Body (12)
1. Damaged Seal (18)
2. Damaged air motor piston rod.
1. Separate pump tube from air motor
and replace Seal (18)
2. Inspect piston rod and replace as
necessary
Product leakage visible at bottom
of Body (12)
1. Pump tube not sufficiently tight
2. Damaged Gasket(s) (21)
1. Tighten pump tube assembly
2. Separate pump tube from air motor
and replace Gaskets (21)
Air leakage at weep hole in
Body (12)
Damaged Seal (16) Separate pump tube from air motor and
replace Seal (16)
Product leakage visible at weep
hole in Pump Tube (28) and/or
Adapter (44)
1. Pump tube not sufficiently tight
2. Damaged Gasket(s) (29)
1. Tighten pump tube assembly
2. Disassemble pump tube and replace
Gaskets (29)
Internal Leaks
Pump does not prime or cycles
continuously, or slowly
(once or twice/hour)
1. Foreign material between Ball (39) and
Adapter (41)
2. Foreign material between Valve
Body (47) and Valve Seat (48)
3. Worn or damaged Ball (39)
4. Worn or damaged Adapter (41)
5. Worn or damaged Valve Body (47)
6. Worn or damaged Valve Seat (48)
7. Worn or damaged Seal (32)
8. Worn or damaged Piston (36)
9. Worn or damaged Seal (46)
10. Worn or damaged Primer Rod (43)
Locate and eliminate source of foreign
material.
Disassemble pump tube, clean, inspect
and replace worn or damaged
components.
Changes Since Last Printing
Added trademark attribution
Loctite and 222 are trademarks of Henkel Corporation in the U.S. and elsewhere. ® denotes a trademark registered in the U.S. Patent and
Trademark Office.

SER 7786-A5 (9-11)

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