Troubleshooting
333397A
7
Troubleshooting
NOTE:
Perform
Pressure Relief Procedure
(page 5)
before checking or servicing the equipment.
NOTE:
Check all possible problems and causes before
disassembling the pump.
Pump
Problem
Cause
Solution
Pump output is low on both strokes.
Air supply lines are restricted.
Clear any obstructions from the air
lines. Make sure all shutoff valves are
open. Increase the pressure, but do
not exceed the maximum working
pressure.
Fluid supply is empty.
Refill and reprime the pump.
Fluid outlet line or valves are
clogged.
Clear the fluid outlet line and valves,
etc.
Throat packings are worn.
Replace the throat packings.
Air pressure is insufficient; or the
air valves are closed or clogged.
Open and clean the air valves.
Enclosed wet cup is too loose.
Tighten the enclosed wet cup.
Pump output is low on only one
stroke.
Piston packings are worn.
Replace the piston packings.
No output.
Ball check valves are improperly
installed.
Check and repair the ball check
valves.
Pump operates erratically.
Fluid supply is empty.
Refill and reprime the pump.
Ball check valves are held open or
worn.
Check and repair the ball check
valves.
Piston packings are worn.
Replace the piston packings.
Pump will not operate.
Air supply lines are restricted.
Clear any obstructions from the air
lines. Make sure all shutoff valves are
open. Increase the pressure, but do
not exceed the maximum working
pressure.
Fluid supply is empty.
Refill and reprime the pump.
Fluid outlet line or valves are
clogged.
Clear the fluid outlet line and valves,
etc.
Air pressure is insufficient; or the
air valves are closed or clogged.
Open and clean the air valves.
Air motor is damaged.
See
Air Motor Repair
, page 13.
Dried fluid seizure of the
displacement rod.
See F
. 12, page 18. Clean the dis-
placement rod (107). Check or replace
the throat packings. Always stop the
pump at the bottom of the stroke and
keep the wet cup filled with TSL.