Alemite 7785-MA Service Manual - Page 13

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Alemite 7785-MA Service Manual
High-Pressure Grease Pump
Pump Indications
Pump does not cycle
Pump will not prime
Pump cycles rapidly
Pump cycles continuously, or
slowly (once or twice/minute)
External Leaks
Product leakage visible at weep
hole in Body (12)
Product leakage visible at bottom
of Body (12)
Air leakage at weep hole in
Body (12)
Product leakage visible at weep
hole in Tube (28) and/or
Adapter (43)
Internal Leaks
Pump does not prime or cycles
continuously, or slowly
(once or twice/minute)
Alemite, LLC
1-800-548-1191-http://[email protected]

Troubleshooting Chart

Possible Problems
1. Air motor not operating properly
2. Pump tube jammed and/or contains
loose components
3. Insufficient air pressure
1. Excessive cycling speed
2. Pump leaking internally
1. Product source empty
1. Pump leaking internally
2. Pump leaking externally
3. Distribution system leaking
1. Damaged Seal (18)
2. Damaged air motor piston rod.
1. Pump tube not sufficiently tight
2. Damaged Gasket(s) (21)
Damaged Seal (16)
1. Pump tube not sufficiently tight
2. Damaged Gasket(s) (29)
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)
Changes Since Last Printing
Changed 323732 to 323743 and 171032-9 to 171032-12
13
SER 7785-A5
Solution
1. Inspect air motor and rebuild or
replace as necessary
2. Rebuild pump tube
3. Increase air pressure
1. Reduce air pressure
2. See Internal Leaks
1. Replenish product
1. See Internal Leaks
2. See External Leaks
3. Correct leak
1. Separate pump tube from air motor
and replace Seal (18)
2. Inspect piston rod and replace as
necessary
1. Tighten pump tube assembly
2. Separate pump tube from air motor
and replace Gaskets (21)
Separate pump tube from air motor and
replace Seal (16)
1. Tighten pump tube assembly
2. Disassemble pump tube and replace
Gaskets (29)
Locate and eliminate source of foreign
material.
Disassemble pump tube, clean, inspect
and replace worn or damaged
components.
Revision (11-08)