14 308573
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
PROBLEM CAUSE SOLUTION
Pump will not cycle, or cycles
once and stops.
Air valve is stuck or dirty. Use filtered air.
Pump cycles at stall or fails to
hold pressure at stall.
Leaky check valves or o-rings. Replace.
Worn check balls or guides. Replace.
Check ball wedged in guide. Repair or replace.
Worn diaphragm shaft seals. Replace.
Pump operates erratically. Clogged suction line. Inspect; clear.
Sticky or leaking check valve balls. Clean or replace.
Diaphragm ruptured. Replace.
Air bubbles in fluid. Suction line is loose. Tighten.
Diaphragm ruptured. Replace.
Loose manifolds or damaged
manifold o-rings.
Tighten manifold bolts or nuts;
replace o-rings.
Loose fluid side diaphragm plates. Tighten.
Fluid in exhaust air. Diaphragm ruptured. Replace.
Loose fluid side diaphragm plates. Tighten.
Worn diaphragm shaft seals. Replace.
Pump exhausts air from clamps. Loose clamps. Tighten clamp nuts.
Air valve o-ring is damaged. Inspect; replace.
Pump leaks fluid from check
valves.
Worn or damaged check valve
o-rings.
Inspect; replace.
No fluid output, and pump
cycles rapidly.
Pump mounted incorrectly. Mount the pump in the upright
position.
1. Relieve the pressure.
2. Check all possible problems and causes before
disassembling the pump.
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