Troubleshooting - Graco ChemSafe 205 Instructions - Parts Manual

Troubleshooting

Troubleshooting
Troubleshooting Troubleshooting
Problem Problem Problem
Pump cycles but will not prime.
Pump cycles at stall or fails to hold
pressure at stall.
Pump will not cycle, or cycles once
and stops.
Pump operates erratically.
Air bubbles in fluid.
Exhaust air contains fluid being
pumped.
Moisture in exhaust air.
16
Cause Cause Cause
Pump is running too fast, causing
cavitation before prime.
Check valve ball is severely warn
or wedged in seat or manifold.
Seat is severely worn.
Outlet or inlet is clogged.
Inlet or outlet valve is closed.
Inlet fittings or manifolds are loose. Tighten.
Manifold o-rings are damaged.
Check valve balls, seats or o-rings
are worn.
Spool valve is stuck or dirty.
Air supply pressure too low.
Spool valve is worn or damaged.
Check valve ball is severely worn
or wedged in seat or manifold.
Dispensing valve is clogged.
Diaphragm is ruptured.
Suction line is clogged.
Check valve balls are sticky or
leaking.
Diaphragm is ruptured.
Exhaust is restricted.
Spool valve is damaged or worn.
Air supply is erratic.
Exhaust muffler is icing.
Suction line is loose.
Diaphragm is ruptured.
Manifolds are loose, or seats or
manifold o-rings are damaged.
Diaphragm glide seals or o-rings
are damaged.
Pump is cavitating.
Diaphragm is ruptured.
Inlet air has high humidity.
Solution Solution Solution
Lower inlet pressure.
Replace ball and seat.
Replace ball and seat.
Unclog.
Open.
Replace o-rings.
Replace.
Disassemble and clean air
valve. Use clean dry air.
Increase air supply pressure.
Replace spool valve.
Replace ball and seat.
Relieve pressure and clear valve.
Replace.
Inspect; clear.
Clean or replace.
Replace.
Remove restriction.
Replace spool valve.
Repair air supply.
Use drier air supply.
Tighten.
Replace.
Tighten manifold bolts or replace
seats and/or o-rings.
Replace.
Reduce pump speed, increase
suction hose diameter, or increase
inlet head.
Replace.
Use drier air supply.
334792G