Graco 233500 Instructions-Parts List Manual page 13

PROBLEM
Pump runs sluggishly.
Pump runs erratically.
Pump runs too fast.
Pump cycles at stall or fails to hold
pressure at stall.
Audible air leak.
Air exhausting from the mounting
holes.
Fluid in the exhaust air.
Air bubbles in fluid.
Poor finish or irregular spray pat-
tern.
Troubleshooting
CAUSE
Worn or damaged carriage o-rings.
Clogged suction line or inlet strainer. Clear.
Sticking or leaking ball check
valves.
Exhausted fluid supply.
Worn ball check valves.
Worn air valve cup or plate.
Fluid covers are installed incorrectly. Align mounting holes in fluid covers
Ruptured diaphragm.
Loose suction line.
Ruptured diaphragm.
Incorrect fluid or air pressure at gun. See gun manual; read fluid
Fluid is too thin or too thick.
Dirty, worn, or damaged spray gun.
Fluid is settling out.
SOLUTION
Service air valve. See page 18.
Disassemble and clean ball checks.
Replace worn parts. See page 16.
Refill fluid supply and prime pump.
Disassemble and clean ball checks.
Replace worn parts. See page 16.
Service air valve. See page 18.
with holes in center housing. See
page 14.
Replace diaphragms. See page 17.
Tighten. Use a compatible liquid
thread sealant on connections.
Replace diaphragms. See page 17.
manufacturer's recommendations.
Use fluid regulator.
Adjust fluid viscosity; read fluid
manufacturer's recommendations.
Service gun.
Use agitator. Order Part No. 245081
Agitator Kit.
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