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WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
Problem
Pump fails to operate
Pump operates, but the fluid output is low on
p p
,
p
both strokes
both strokes
Pump operates, but the output is low on the
p p
,
p
down stroke
down stroke
Pump operates, but the output is low on the
upstroke
p
Pumps is operating erratically, or speeds up
p
p
g
y,
suddenly
suddenly
Troubleshooting
Cause
Restricted air line or inadequate air supply
Insufficient air pressure
Closed or clogged valves or regulators on the air
and/or fluid side of the system.
Fluid has dried on the displacement rod
Air motor is dirty, worn, or damaged
Empty fluid supply container
Restricted air line or inadequate air supply
Insufficient air pressure
Fluid hose or gun is clogged
Fluid is too heavy for the pump to prime
Loose packing nut or worn throat packings
Ball travel restricted too much for the viscosity of
fluid being pumped.
Fluid is too heavy for the pump to prime
Damaged cylinder o-rings
The intake valve is stuck open or worn
Ball travel restricted too much for the viscosity of
fluid being pumped.
The piston valve is stuck open or the packings are
worn
Damaged cylinder o-rings
p
p
Empty fluid supply container
Fluid hose or gun is clogged
The piston valve is stuck open or the packings are
worn
The intake valve is stuck open or worn
Loose packing nut or worn throat packings
Relieve the Pressure before you check or service any
system equipment.
NOTE: Check all other possible problems and solu-
tions before disassembling the pump.
Solution
Clear the line. See the Technical Data on page
11 for air volume requirements.
Increase air pressure – the pump will not oper-
ate below 30 psi (2.1 bar, 210 KPa) air pressure.
Check the valves and regulators and adjust or
clean as needed.
Clean. See displacement pump manual
308–043. Also, keep TSL in the pump wet-cup,
and stop the pump at the bottom of its stroke
during non-use.
Service the motor. See manual 307–049. Be
sure the air supply is clean and dry, and that the
motor is properly lubricated.
Refill the fluid supply container
Clear the lines. See the Technical Data on page
11 for air volume requirements.
Increase air pressure – the pump will not oper-
ate below 30 psi (2.1 bar, 210 KPa) air pressure.
Clean the hose or gun, flush frequently.
Use an inductor plate or ram.
Tighten packing nut or replace packings as
needed. See manual 308–043.
See Check Valve Adjustment in manual
308–043.
Use an inductor plate or ram.
Replace o-rings. See manual 308–043.
Check; replace parts as needed. See manual
308–043.
See Check Valve Adjustment in manual
308–043
Check, replace parts as needed. See manual
308–043
Replace o-rings. See manual 308–043
Refill. Also see Operation on page 6.
Clean the hose or gun. Flush frequently.
Check, replace parts as needed. See manual
308–043.
Check; replace parts as needed. See manual
308–043.
Tighten packing nut or replace packings as
needed. See manual 308–043.
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