Filter
Top Products
309303 13
Troubleshooting
PROBLEM CAUSE SOLUTION
Pump runs sluggishly. Worn or damaged carriage o-rings. Service air valve. See page 18.
Pump runs erratically.
Clogged suction line or inlet strainer. Clear.
Sticking or leaking ball check
valves.
Disassemble and clean ball checks.
Replace worn parts. See page 16.
Pump runs too fast. Exhausted fluid supply. Refill fluid supply and prime pump.
Pump cycles at stall or fails to hold
pressure at stall.
Worn ball check valves. Disassemble and clean ball checks.
Replace worn parts. See page 16.
Audible air leak. Worn air valve cup or plate. Service air valve. See page 18.
Air exhausting from the mounting
holes.
Fluid covers are installed incorrectly. Align mounting holes in fluid covers
with holes in center housing. See
page 14.
Fluid in the exhaust air. Ruptured diaphragm. Replace diaphragms. See page 17.
Air bubbles in fluid.
Loose suction line. Tighten. Use a compatible liquid
thread sealant on connections.
Ruptured diaphragm. Replace diaphragms. See page 17.
Poor finish or irregular spray pat-
tern.
Incorrect fluid or air pressure at gun. See gun manual; read fluid
manufacturer’s recommendations.
Use fluid regulator.
Fluid is too thin or too thick. Adjust fluid viscosity; read fluid
manufacturer’s recommendations.
Dirty, worn, or damaged spray gun. Service gun.
Fluid is settling out. Use agitator. Order Part No. 245081
Agitator Kit.