Graco PRO 5500wb Instructions-Parts List Manual page 31

Gun Operation Troubleshooting (continued)
Problem
Dirty air cap
Air leakage from the air cap
Air leakage from the manifold
Fluid leakage at the quick-
disconnect
Troubleshooting
Cause
The air cap and fluid nozzle are mis-
aligned.
Air Cap
Fluid Nozzle
ALIGNED MISALIGNED
The o-rings on the piston stem are
worn.
The manifold gasket is damaged, or
the manifold is not tight.
The manifold is not tight.
The fluid hose is not seated properly.
The o-rings on the fluid hose are
worn or missing.
Solution
Check the air cap and fluid nozzle
seat for fluid buildup. Clean or
replace parts as needed; see page 24
or 36.
Inspect the o-rings; replace them as
needed; see page 39.
Replace the gasket or tighten the
manifold screws; see page 44.
Tighten the manifold screws.
Make sure the hose was stripped and
installed correctly; see page 15.
Inspect or replace the o-rings.
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