Alemite 7785 Series User manual

Service Guide 7785-A5
7785-B5
7785-MA
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
396688 and is not to be copied, used, or disclosed to others without express written permission. Revision (11-08)
SER 7785-A5
Figure 1High-Pressure Pump Model 7785 Series
Model 7785-A5 Shown
8568 Series
Description
The major components of the pump models in the 7785 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 (40:1 ratio)
are designed to deliver a range of greases (up to NLGI # 3) and
operate directly from their original drums or bulk containers*.
Models 7785 Series Comparison
Each pump model is designed with a pump tube length to
accommodate different size containers. See Figure 1.
Model 7785-MA is equipped with an air inlet and a material
outlet adapter with BSPP threads. See Table 1.
* Pump model 7785-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
7785-A5 400 -
33-1/8 84 52-1/4 133
7785-MA * - 180
7785-B5 120 - 25-5/8 65 44-3/4 114
* With BSPP Inlet and Outlet Adapters (See Table 1)
Specifications
Air Motor
Pump Tube
Pump
Model
Air Inlet Maximum
Air Pressure
Body Adapter psi bar
7785-A5, -B5 3/4" NPTF Not Applicable 200 14
7785-MA 3/4" BSPP (f) x 3/4" NPTF (m)
For additional air motor specifications, refer to Service Guide SER 323440-4
Pump Model Material Outlet Adapter
Maximum
Material Pressure
Delivery/Min.
(Approximate) **
Displacement
per Cycle
psi bar lbs. kg in
3
cm
3
7785-A5 and 7785-B5 1/2 " NPTF (f) x 1/2 " NPTF (m) 8000 552 25 113 2.45 40.15
7785-MA 1/2 " BSPP (f) x 1/2 " NPTF (m)
** For detailed information, refer to Figure 3
Table 1 High-Pressure Pump Model 7785 Series Specifications
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 2 Alemite, LLC
Figure 2-A High-Pressure Grease Pump Model 7785 Series - Exploded View
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 3 Revision (11-08)
Repair Kits
Part No. Kit Symbol Description Notes
398988-2 Kit, Major Repair Includes items on Figure 2-A and 2-B
393040-1 Kit, Minor Repair (for Body and Seal Group)
393622 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 7785-A5, -B5
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 7785-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 7785-MA 340122 (24)
Legend:
Part numbers left blank (or in italics) are not available separately
designates a repair kit item
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 4 Alemite, LLC
Figure 2-B High-Pressure Grease Pump Model 7785 Series - Exploded View
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 5 Revision (11-08)
Item
No. Part No. Description Qty Notes Numeric Order Part # (Item #)
25 323439 Coupling 2 18850 (51)
26 324648 Clip, Spring 4 Qty 2 in
Kit 50666 (39)
27 323438-22 Rod, Pump Tube, 13.25 " Long 1 Model 7785-A5, -MA 131402 (29)
323438-23 Rod, Pump Tube, 5.75 " Long 1 Model 7785-B5 131398-1 (49)
28 333257-1 Tube, Pump, 22.25 " Long 1 Model 7785-A5, -MA 171032-12 (41)
333257-3 Tube, Pump, 14.75 " Long 1 Model 7785-B5 171700-32 (38)
29 131402 Gasket, 1.68 " OD (Aluminum) 4 Qty 2 in
Kit
172190-8 (47)
30 337380 Barrel Assembly 1 Includes Item 31 172190-7 (32)
31 Ring, Wear (Glass-Reinforced Nylon) 1 323438-22 (27)
32 Seal, 1.00 " ID x 1.375 " OD 1 323438-23 (27)
33 Bearing (Brass) 1 323439 (25)
34 Spacer 1 323717 (36)
35 332246 Piston 1 323743 (40)
36 323717 Retainer 1 323734 (50)
37 327705 Spring, 1-1/2 " Long Straight 1 323738 (48)
38 Ball, 1/2 " Dia. 1 323741 (45)
39 50666 Washer, 0.87 " OD (Aluminum) 1 323742 (44)
40 323743 Adapter 1 323747-2 (43)
41 171032-12 Pin, Roll, 3/32 Dia. x 15/16" Long 1 324648 (26)
42 333342 Rod, Primer 1 327705 (37)
43 323747-2 Adapter 1 332246 (35)
44 323742 Washer, Guide 1 333085 (52)
45 323741 Screw, 1.00 " 1 333257-1 (28)
46 Washer, 0.93 " OD (Nylon) 2 333257-3 (28)
47 Seal, 0.50 " ID x 0.950 " OD 1 333342 (42)
48 323738 Body, Valve 1 337376 (34)
49 131398-1 Seat, Valve 1 337377 (33)
50 323734 Plate 1 337378 (46)
51 18850 Nut, Elastic Stop, 1/4 " - 28 1 337379 (31)
52 333085 Body, Primer 1 337380 (30)
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
398988-2 Kit, Major Repair Includes items on Figure 2-A and 2-B
393622 Kit, Minor Repair (for Pump Tube Assembly) Includes items on Figure 2-A and 2-B
394077-1 Kit, Minor Repair (for Lower Pump Tube Packing)
393530-7 Kit, Seal [includes five (5) of item number 32]
393530-8 Kit, Seal [includes five (5) of item number 47]
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 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
7785-A5 338912 323847-4
317811-5 317882-7 321155
326750-B1 3241707785-B5 338804 323800-4
7785-MA - - - - -
Table 2 Model 7785 Series Accessories
Figure 3 Delivery versus Discharge Pressure and Air Consumption
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 7 Revision (11-08)
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
solvents such as methylene chloride or 1,1,1-
trichlorethane in this pump. An explosion can
result 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.
Removal
NOTE: These model pumps are used in
numerous applications and are mounted
accordingly. The following procedures
consider the pump assembly to be
mounted to a container with a cover.
1. Remove the cover and pump assembly from its
container.
2. Remove the four bolts that secure the pump
assembly to the cover.
IMPORTANT: Remove the follower from
the bottom of the container.
Disassembly
1. Unscrew Adapter (5) from Air Motor Assembly (2).
2. Remove Washer (8) and rubber Bushing (9).
Separate Pump Tube from Air Motor
3. Clamp the motor housing horizontally in a vise.
4. Loosen Jam Nut (23) that secures the Pump Tube
assembly to the Air Motor Assembly.
CAUTION
Support the Pump Tube assembly during removal.
Damage to components can occur.
5. Unscrew Pump Tube (28) [with attached components]
from the Air Motor.
6. Pull on the Pump Tube to expose Coupling (25).
7. Remove upper Spring Clip (26) that secures Pump Tube
Rod (27) to Coupling (25).
8. Unscrew the Coupling from the air motor piston rod.
• Rotate the entire Pump Tube assembly.
Pump Tube Upper Packing
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 (43) securely
in a soft-jaw vise.
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 8 Alemite, LLC
30. Remove Roll Pin (41) that secures Adapter (40) to
Primer Rod (42).
• Use a punch and a small hammer.
31. Unscrew Primer Rod from Adapter.
32. Remove Valve Body (48) [with attached components]
and Guide Washer (44) from the upper end of the
Primer Rod assembly.
33. Remove Screw (45), nylon Washer (46), Seal (47) and
additional Washer (46) from the Valve Body.
34. Unscrew the Adapter from Piston (35).
35. Remove aluminum Washer (39), Ball (38), Spring
(37), and Retainer (36) from the Piston.
Clean and Inspect
NOTE: Use the appropriate repair kit for
replacement parts. Make sure all the
components are included in the kit before
discarding 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 (35) and Primer Rod (42) 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.
17. Unscrew and remove Pump Tube (28) from the
Adapter.
18. Remove upper and lower 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 (35)
separately.
20. Remove lower Spring Clip (26) that secures Piston
(35) to lower Coupling (25).
21. Unscrew the Coupling from the Piston.
22. Remove Barrel Assembly (30) from the Piston.
23. Remove both aluminum Gaskets (29).
24. Remove brass Bearing (33), Seal (32), and nylon Wear
Ring (31) from the Barrel.
25. Unscrew Primer Body (52) from Adapter (43).
26. Remove the Primer Rod (with attached components)
from the bottom of the Adapter.
27. Remove Spacer (34) from top of Adapter.
28. Remove Stop Nut (51) from Primer Rod (42).
• Support the Primer Rod through the hole as needed.
29. Remove Plate (50), Gasket (29), Valve Seat (49), and
additional Gasket (29) from the Primer Rod assembly.
CAUTION
Support the Piston and Primer Rod assembly dur-
ing Roll Pin (41) removal. Damage to components
can occur.
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, 1.00 " ID x 1.375 " OD
14 O-Ring, 1-3/16 " ID x 1-5/16 " OD 47 Seal, 0.50 " ID x 0.950 " OD
16 Seal, 0.812 " ID x 1.062 " OD
18 Seal, 0.812 " ID x 1.562 " OD
Table 4 Components Lubricated in Clean Oil
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 9 Revision (11-08)
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.
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 7785-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.
Figure 4 Upper Packing - Section View
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 10 Alemite, LLC
18. Install aluminum Gasket (21), Washer (22), and
additional Gasket (21) into the Body.
• Make sure the components maintain their position.
Pump Tube
NOTE: Refer to Figure 5 for cross section
view of pump tube components.
19. Clamp the flats of Piston (35) into a soft-jaw vise.
• Make sure the Piston bore points upward.
20. Install Retainer (36) [flange end first] into the Piston.
• Make sure the Retainer centers and seats properly.
21. Install Spring (37) into the Piston.
22. Install Ball (38) into the Spring.
23. Install Washer (39) onto Adapter (40).
24. Screw the Adapter (with Loctite 222) into the Piston.
See Figure 2-B.
• Tighten securely.
25. Install Washer (46) into Valve Body (48).
CAUTION
Use care seating Seal (47) into the Valve Body.
Damage to the Seal can occur.
26. Install and seat Seal (47) [heel end first] into the Valve
Body.
27. Install additional Washer (46) and Screw (45) into the
Valve Body.
• Do not tighten or seat the Screw.
28. Lubricate the Primer Rod with grease.
29. Install the Valve Body assembly onto the upper end of
the Primer Rod.
• Use a small hammer or other suitable tool.
30. Tighten the Screw into the Valve Body securely.
31. Install Guide Washer (44) onto the Primer Rod.
32. Screw Primer Rod (42) into the Adapter until the Roll
Pin holes align.
CAUTION
Support the Primer Rod and the Adapter during
Roll Pin (41) installation. Damage to components
can occur.
Figure 5 Pump Tube Assemblies
323730-A1 and 323730-B1 - Section View
Refer to Figure 2-B
Parts List
for Parts Identification
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 11 Revision (11-08)
33. Install Roll Pin (41).
• Use a small hammer.
34. Install Valve Seat (49), Plate (50), and Stop Nut (51)
onto the Primer Rod.
• Tighten the Stop Nut securely. Place a small punch
into the hole of the Primer Rod to prevent its rotation
35. Position Adapter (43) horizontally into the vise.
Internally-Threaded End of Adapter
36. Install Gasket (29) into the internally-threaded end of
the Adapter.
37. 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.
38. Install the additional Gasket (29) onto Valve Seat (49).
Externally-Threaded End of Adapter
39. Install Spacer (34) into the externally-threaded end of
the Adapter.
• Make sure the Spacer centers and seats properly.
40. Install Gasket (29) into the Adapter.
41. Position Barrel assembly (30) with the large diameter
pointing upward.
42. Install Wear Ring (31) into the Barrel Assembly.
43. Install and seat Seal (32) [lip end first] into the Barrel
Assembly.
44. Install Bearing (33) into the Barrel Assembly.
CAUTION
Use care installing the Barrel Assembly over the
threads of Piston (35). Damage to the Seal can
occur.
45. Install the Barrel Assembly (large diameter first) onto
Piston (35).
• Make sure the Barrel Assembly seats properly
against Spacer (34).
46. Install Gasket (29) onto the Barrel Assembly.
47. Screw the upper and lower Couplings (25) onto each
end of Pump Tube Rod (27) until the Spring Clip holes
align.
48. Install Spring Clips (26).
49. 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.
50. Screw Pump Tube (28) onto Adapter (43)
[with Loctite 222]. See Figure 2-B.
• Do not tighten.
51. Screw Primer Body (52) [with Loctite 222] into the
opposite end of the Adapter. See Figure 2-B.
• Do not tighten.
52. Screw Jam Nut (23) onto the Pump Tube.
53. Push on Plate (50) to expose Coupling (25) from the
Pump Tube as necessary.
Attach Pump Tube to Air Motor
54. Screw the Coupling onto the air motor piston rod until
the Spring Clip holes align.
• Rotate the entire pump tube assembly.
55. Install the Spring Clip.
56. Screw the pump tube assembly into Body (12).
57. Place a large wrench or other suitable tool into the slot
of Primer Body (52).
• Tighten all the components of the assembly securely.
Crush all gaskets.
58. Tighten Jam Nut (23).
Operation
Bench Test and Prime
NOTE: Perform the following procedures at
a pressure not to exceed 40 psi (2.8 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 (2) to the inlet of the Air Motor.
5. Connect an air line to Air Coupler (3).
6. Connect the Air Coupler to the Connector.
7. 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.
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SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 12 Alemite, LLC
Priming
With air pressure at zero:
8. Place the pump in the product to be dispensed.
9. Slowly supply air pressure to the pump’s motor.
10. 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.
11. Check the motor for air leakage.
If the motor leaks, refer to the Air Motor Service
Guide 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:
12. Attach a control valve to the outlet hose of the pump.
13. Set the air pressure to 100 psi (6.9 Bar).
14. Operate the control valve into a container.
15. Allow the pump to cycle until the system and product
is once again free of air.
16. Shut off the control valve.
• The pump should not cycle.
If the pump cycles slowly (once or twice a minute) or
continuously, refer to the Troubleshooting Chart for
details.
Installation
NOTE: The following procedures consider
the pump assembly to be installed onto a
container with a cover.
1. Install the bolts that attach the cover to the pump
assembly.
• Tighten the bolts securely.
2. Place the follower into the container.
3. Press downward and maneuver the follower until
grease appears around its edges and center hole.
• Make sure all air is removed.
4. Install the pump assembly through the follower and
onto the container.
5. Secure the cover and pump assembly to the container.
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 7785-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 Table 6.
Part Number Description
338862 Moisture Separator/Regulator & Gauge Combination
5608-2 Moisture Separator
7608-B Regulator and Gauge
5908-2 Lubricator *
Table 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
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High-Pressure Grease Pump SER 7785-A5
Alemite, LLC 13 Revision (11-08)
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 1. Product source empty 1. Replenish product
Pump cycles continuously, or
slowly (once or twice/minute)
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 Tube (28) and/or
Adapter (43)
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/minute)
1. Foreign material between Ball (38) and
Adapter and Insert assembly (40)
2. Foreign material between Valve
Body (48) and Valve Seat (49)
3. Worn or damaged Ball (38)
4. Worn or damaged Adapter and Insert
assembly (40)
5. Worn or damaged Valve Body (48)
6. Worn or damaged Valve Seat (49)
7. Worn or damaged Seal (32)
8. Worn or damaged Piston (35)
9. Worn or damaged Seal (47)
10. Worn or damaged Primer Rod (42)
Locate and eliminate source of foreign
material.
Disassemble pump tube, clean, inspect
and replace worn or damaged
components.
Changes Since Last Printing
Changed 323732 to 323743 and 171032-9 to 171032-12
1-800-548-1191-http://[email protected]

SER 7785-A5 High-Pressure Grease Pump
Revision (11-08) 14 Alemite, LLC
1-800-548-1191-http://[email protected]