Troubleshooting
Troubleshooting
Troubleshooting
• Follow the
Pressure Relief Procedure, page 9
,
before checking or servicing the equipment.
• Check all possible problems and causes before
disassembly.
Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
Pump cycles at stall or fails
to hold pressure at stall.
Worn checks or seats.
Replace.
Air valve is stuck or dirty.
Disassemble and clean air valve. Use
filtered air.
Check ball is severely worn and wedged
in seat or manifold.
Replace ball and seat component.
Check valve ball is severely wedged into
seat due to overpressurization.
Follow
Pressure Relief Procedure, page 9
Disassemble ball check assembly and
inspect for damage.
Clogged dispensing valve.
Follow
Pressure Relief Procedure, page 9
Clear valve.
Pump will not cycle, or
cycles once and stops.
Leak detector has activated a shut-
down solenoid.
Investigate failure and reset leak
detector.
Clogged suction line.
Inspect; clear.
Sticky or leaking check balls or flap
valves.
Clean or replace.
Flap valves installed upside-down.
Install the flapper valve with the text side
facing the seat.
Ruptured diaphragm.
Replace. See standard or overmolded
diaphragm repair procedure.
Reduced Pump
Performance
Restricted exhaust.
Remove restriction.
Loose suction line.
Tighten.
Ruptured diaphragm.
Replace. See standard or overmolded
diaphragm repair procedure.
Air bubbles in fluid.
Loose inlet manifold, damaged seal
between manifold and fluid cover,
damaged gaskets.
Tighten manifold clamps or replace
gaskets or seating components .
Loose sanitary clamp.
Tighten clamp.
Damaged or worn gasket.
Replace gasket.
Leak in inlet or outlet sanitary
fitting.
Misalignment of inlet/outlet fluid lines or
pipe.
Use flexible fluid lines at pump inlet and
outlet.
Manifolds do not fit for
installation onto fluid covers.
Use of incorrect air cover gaskets results
in misalignment.
Install correct air cover gaskets for the
type of diaphragms in use. See Parts list
for correct gasket.
812.0065
7
