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307982
Troubleshooting
Continued from the previous page.
Problem
Cause
Solution
Erratic or accelerated pump
Exhausted fluid supply
Refill and prime.
p
p
speed
Fluid too heavy for pump to prime
Use bleeder valve (See
Operation
on page 8). Use inductor or ram
unit.
Held open or worn piston valve or
packings
Clear valve; replace gland/packing
stack.
Held open or worn priming piston
Clear; service.
Worn throat packings in displacement
pump
Replace gland/packing stack.
Air motor icing
Reduce air line moisture content.**
* To clear the pump, follow the
Pressure Relief Procedure
on page 8. Disconnect the fluid line. If the pump starts
when the air is turned on, the hose or spray gun is obstructed.
**Be sure there is a vertical loop in the air line drop hose from the main air supply line. Also use an air and moisture
separator to minimize moisture in the air line.
