PROBLEM
Pump will not start
Erratic operation of
air motor, air motor
stops
Continuous air leak
from the exhaust
Pump does not stop
on the down stroke
Pump does not stop
on the up stroke
Pump runs erratically
Pump runs, with no
output
77-3040-R1.2 (10/2014)
POGO PUMP ASSEMBLIES – TROUBLESHOOTING
CAUSE
No compressed air.
Spray tip is blocked.
Worn poppet assemblies.
Worn or dirty spool and sleeve
assembly.
Worn poppet assemblies.
Worn piston seal.
Worn diaphragm.
Worn or dirty lower ball check.
Worn or dirty upper ball check.
Worn or dirty lower packings.
Blocked fluid inlet.
Low material level.
Loose connection in fluid pump.
Stuck lower ball.
Check compressed air supply.
Clean or replace the spray tip.
Replace the poppet assemblies.
Clean or replace the spool and sleeve
assembly, as necessary.
Replace poppet assemblies.
Replace piston seal.
Replace diaphragm.
Replace or clean the parts as necessary.
Replace or clean the parts as necessary.
Replace or clean the fluid inlet.
Replace or refill material container.
Check that all connections are tight.
Replace or clean the parts as necessary.
9 / 12
SOLUTION
EN