Troubleshooting

Gun Operation Troubleshooting

Problem

Cause

Solution

 

 

 

Excessive spray fog.

Atomization air pressure too high.

Decrease air pressure as low as pos-

 

 

sible.

 

 

 

 

Fluid too thin.

Increase viscosity.

 

 

 

“Orange Peel” finish.

Atomization air pressure too low.

Increase air pressure; use lowest

 

 

pressure necessary.

 

 

 

 

Spray tip (4) too large.

Use smaller tip; see page 51.

 

 

 

 

Poorly mixed or filtered fluid.

Remix or refilter fluid.

 

 

 

 

Fluid too thick.

Reduce viscosity.

 

 

 

Fluid leaks from the fluid packing

Worn fluid needle packings or shaft.

Replace fluid needle assembly (8);

area

 

see page 41.

 

 

 

Air leaks from the air cap

Worn piston stem o-rings (34e, 34f).

Replace; see page 42.

 

 

 

Fluid leakage from the front of the

Worn or damaged fluid needle (8).

Replace; see page 41

gun

 

 

 

 

 

 

Worn fluid seat housing (5).

Replace; see page 37.

 

 

 

 

Loose spray tip (4).

Tighten retaining ring (1); see page

 

 

37.

 

 

 

 

Damaged tip seal (4a).

Replace; see page 37.

 

 

 

Gun does not spray

Low fluid supply.

Add fluid if necessary.

 

 

 

 

Dirty or clogged spray tip (4).

Clean; see page 37.

 

 

 

 

Damaged spray tip (4).

Replace; see page 37.

 

 

 

 

Damaged fluid needle (8).

Replace; see page 41.

 

 

 

 

Piston (34) not actuating.

Check cylinder air. Check piston

 

 

u-cup (34d); see page 48.

 

 

 

 

Actuator arm (29) is out of position.

Check actuator arm and nuts. See

 

 

page 43.

 

 

 

Paint buildup on air cap

Atomization air pressure too high.

Reduce.

 

 

 

 

Dirty air cap.

Clean; see page 37.

 

 

 

Air leaks from manifold

Manifold is not tight.

Tighten manifold screws (106).

 

 

 

 

Worn or missing o-rings.

Replace o-rings. See page 43.

 

 

 

Fluid doesn’t shut off properly.

Seat housing (5) too tight.

Replace; see page 37.

 

 

 

 

Fluid buildup on fluid needle (8).

Replace needle; see page 41.

 

 

 

 

Piston sticking.

Clean or replace o-rings. See page

 

 

43.

 

 

 

309298J

33

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Graco Inc 244592, 309298J, TI1713A, PRO Auto Xs AA important safety instructions Gun Operation Troubleshooting

244592, PRO Auto Xs AA, TI1713A, 309298J specifications

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