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
flapper checks.
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, or
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 line
or pipe.
Use flexible fluid lines at pump inlet
and outlet.
3A6781D
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