9
307679
Troubleshooting
NOTE:
Check all possible problems and solutions before disassembling pump.
Problem
Cause(s)
Solution(s)
Pump fails to operate
Dirty or worn air motor parts
Clean and service; see manual
307851.
Restricted air line or inadequate air
supply
Clear; increase sir supply; check air
pressure (see
Technical Data
on
page 23).
Insufficient air pressure, closed or
clogged air valves
Increase air pressure; clear clogged
fluid hose or valve*.
Worn or damaged air or fluid valves
or seals
Replace valves or seals.
Pump operates but output low on
both strokes
Restricted or inadequate air supply
Clear; increase air supply; check air
pressure (see
Technical Data
on
page 23).
Clogged fluid line, gun, etc.
Open; clear*.
Exhausted fluid supply
Refill; purge all air from pump and
fluid lines.
Worn or damaged air or fluid valves
or seals
Replace valves or seals.
Pump operates but output low on
downstroke
Worn or damaged air or fluid valves
or seals
Replace valves or seals.
Intake valve held open
Clear; service if necessary.
Pump operates but low on upstroke
Worn or damages air or fluid valves
or seals
Replace valves or seals.
Piston valve held open
Clear; service if necessary.
Erratic or accelerated operation
Exhausted fluid supply
Refill; purge all air from pump and
fluid lines.
Broken air motor compression
spring
Replace; see manual 307851.
*To determine if the fluid hose or gun/valve is obstructed, follow the
Pressure Relief Procedure
on page 7. Dis-
connect the fluid hose and place a container at the pump fluid outlet to catch any fluid. If the pump starts when the
air is turned on, the obstruction is in the fluid hose or gun/valve.
