13
TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
SOLUTION
Pump does not draw water.
The in-line strainer is clogged.
Clean the in-line strainer.
The suction line is plugged or collapsed.
Examine the suction line.
Gate valve in suction line is closed.
Open gate valve.
One or more valves are seating improperly.
Examine the valve seatings and clean them
or replace if scored or worn.
Oil comes out of the dis-
charge port.
One or more diaphragms are split.
Drain the pump of oil. Dismantle the heads
and replace the diaphragms. Refill the pump
with fresh oil.
The pressure gauge fluctu-
ates excessively
The pump is sucking in air somewhere in the
suction line.
Examine the suction line and make certain
all parts are firmly secured.
Air has not been entirely evacuated from the
pump.
Run the pump with the outlet hose open to
evacuate air from the pump.
The liquid flow is irregular.
Incorrect charge In the pulsation damper.
Check the charge in the pulsation damper.
(10% of working pressure.)
One or more valves are seating improperly.
Examine the valve seatings and clean them
or replace them if scored or worn.
The output drops and the
pump is noisy.
The oil level is too low.
Add oil to the correct level for the pump.
No agitation.
Fiberglass sprayer - The agitator belt is
loose.
Tighten the agitator belt.
Poly sprayer -The ball valve to the agitator is
shut off or the line is plugged.
Open the ball valve to the agitator. Check
the line to the agitator.
