3
R. 02/22 853 827
Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone (828) 686-8511 • Fax (828) 686-8533
2022_02_25-12:30
EN
OPERATION
TROUBLESHOOTING
SEPARATE THE AIR MOTOR FROM THE PUMP
1.
Fix the pump horizontally in a vice (Fig.4). Tap with a hammer on the upper pipe (68) near the junction with the body (44) to break the thread sealant.
2.
Unscrew the choke nut (78) and remove it (77).
3.
Place a long sturdy bar or tube (to act as a lever) at the material outlet, and use it to uncouple the motor.
4.
Once unscrewed, pull the motor until you can see the pin (35) on the rod (34).
Using a hammer and a hammer driver, remove the pin (35). The motor is now loose.
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 (44).
Grease has passed over to the air motor caused by
scratched piston rod (34) or worn or damaged seals
2x(39).
Verify the piston rod (34) and replace damaged /
worn parts.
Air leakage through the air outlet muffler
(55).
Damaged or worn piston O ring (31).
Replace O Ring (31).
Damaged or worn spool seals.
Replace seals 4x(11), (12) and (13), or replace instead
the full assemled spool (539505) (recommended).
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 (53).
REPAIR AND CLEANING PROCEDURE
WARNING:
Before starting any kind of maintenance or repair, disconnect the compressed air supply and open the valve to relieve the grease
pressure.
!
Fig. 4
This pump is self–priming. To prime it the first time, it is convenient to
connect the air supply to the pump while keeping the outlet gun opened,
and increase the air pressure slowly from 0 to the desired pressure by using
a pressure regulator. Once grease starts flowing through all the outlets, the
pump is primed.
The pump starts to pump when an outlet valve is opened, for example a
grease control gun.
NOTE: It is important that the foot valve do not come in contact with dirty
areas, such as a workshop floor, because it may become contaminated with
dirt or other particles that can damage the seals.
78 77
68
35 34
44
