VERDER VA50PAPPSPSPFEOO, Repair Parts

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Troubleshooting
Troubleshooting
Problem Cause Solution
Pump is running too fast, causing
cavitation before prime.
Reduce air inlet pressure.
Check valve ball severely worn or
wedged in seat or manifold.
Replace ball and seat.
Seat severely worn. Replace ball and seat.
Outlet or inlet clogged. Unclog.
Inlet or outlet valve closed. Open.
Inlet fittings or manifolds loose. Tighten.
Pump cycles but will not prime.
Manifold o-rings damaged.
Replace o-rings.
Pump cycles at stall or fails to hold
pressure at stall.
Worn check valve balls, seats, or
o-rings.
Replace.
Air valve is stuck or dirty. Disassemble and clean air valve. Use
filtered air.
Check valve ball severely worn and
wedged in seat or manifold.
Replace ball and seat.
Pilot valve worn, damaged, or
plugged.
Replace pilot valve.
Air valve gasket damaged. Replace gasket.
Pump will not cycle, or cycles once
and stops.
Dispensing valve clogged. Relieve pressure and clear valve.
Clogged suction line. Inspect; clear.
Sticky or leaking check valve balls. Clean or replace..
Diaphragm (or backup) ruptured. Replace.
Restricted exhaust. Remove restriction.
Pilot valves damaged or worn. Replace pilot valves.
Air valve damaged. Replace air valve.
Air valve gasket damaged. Replace air valve gasket.
Air supply erratic. Repair air supply.
Pump operates erratically.
Exhaust muffler icing.
Use drier air supply.
8 859.0302