5
R. 07/21 853 806
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
EN
2021_07_23-14:00
TROUBLESHOOTING
REPAIR AND CLEANING PROCEDURE
Symptoms Possible Reasons Solutions
The pump is not working or there is no
grease delivery.
No suitable air supply pressure. Increase the air supply pressure.
Some outlet circuit element is clogged or closed. Clean or open the outlet circuit.
There is an air pocket in the grease inlet area. Stir and repack the grease.
The pump begins to operate very fast. The drum is empty or the grease level is beneath
the suction tube inlet.
Replace the drum or insert the suction tube until
the inlet reaches the grease level.
The pump keeps on operating although
the grease outlet is closed.
There is a grease leakage at some point in the
circuit. Verify and tighten or repair.
Contamination in the upper valve. Disassemble and clean. Replace if damaged.
Contamination in the foot valve. Disassemble and clean. Replace if damaged.
Grease leakage through the air outlet
muffler or the leakage warning hole on
the pump body (69).
Grease has passed over to the air motor caused
by scratched piston rod (49) or worn or damaged
seals (54, 57).
Verify the piston rod (49) and replace damaged
/ worn parts.
Air leakage through the air outlet
muffler (25).
Damaged or worn piston O ring (44). Replace O Ring (44).
The air seal (8) of the inverter assembly is
damaged or worn. Replace the air seal (8).
Damaged or worn spool seals. Replace the seals (18) and (20).
Grease output too low or diminishes
over time.
Contamination in the foot valve. Remove and clean. Replace if damaged.
Contamination in the upper valve. Remove and clean. Replace if damaged.
The exhaust muffler is clogged by compressed air
dirt or lubricant. Replace the muffler felt.
WARNING: Before starting any kind of maintenance or repair,
disconnect the compressed air supply and open the valve to
relieve the grease pressure.
!
SEPARATE THE AIR MOTOR FROM THE PUMP
1. Fix the pump in a vise in horizontal position (fig. 6). Gently blow
with a hammer the upper tube (73) close to the body (69) in order
to break the thread locker.
2. Unscrew the nut (94) and remove the primer (93).
3. Put a bar, rod or any kind of strong tube in the fluid outlet and use
it as a lever to unscrew the air motor.
4. Once unscrewed, pull the motor away untill the elastic pin (70) into
the rod (49) becomes visible. With a hammer and a suitable pin
punch, eject the pin (70). The motor becomes loose.
Fig. 6
69
49
70
73
93
94
