Troubleshooting

 

 

 

Problem

Cause

Solution

 

 

 

 

 

 

Material runs out of bottom of sprayer

RotoFlex HD Pump worn out

Replace hose.

 

 

 

 

Loose fittings

Check and retighten all fittings.

 

 

 

No air from compressor

Gun air valve closed

Open gun air valve.

 

 

 

 

Gun needle plugged

Clean needle and retry.

 

 

 

 

Lines not connected

Check all quick disconnect connec-

 

 

tions to gun and hoses.

 

 

 

 

Damaged hose

Replace hose.

 

 

 

 

Worn compressor

Service compressor. Contact a quali-

 

 

fied Graco Service Center.

 

 

 

Speed of application too slow

Material too thick

Thin material.

 

 

 

 

Nozzle too small

Change nozzles to a larger size. See

 

 

Operation Manual, Recommended

 

 

Nozzle Selection Chart, page 20.

 

 

 

Speed of application too slow (cont.)

Flow control set too low

Increase flow control setting

 

 

 

 

Plugged or dirty gun

Relieve Pressure, page 7. Clean

 

 

gun.

 

 

 

 

Kinked hose

Unkink hose.

 

 

 

 

Gun fluid flow adjustment set too low

Increase flow adjustment with flow

 

 

adjustment nut.

 

 

 

Intermittent flow/sputtering or air in

Hopper connection not tight

Check gasket. TIghten connection.

material

 

 

Debris in system

Clean

 

 

 

 

Air quick disconnect does not stay

Dirty or corroded fitting

Clean thoroughly. Soak in oil. Apply a

connected.

 

few drops of light oil.

 

 

 

Gun will not shut off

Worn nozzle or needle.

Relieve Pressure, page 7. Replace

 

 

worn parts.

 

 

 

 

Debris in needle passage

Relieve Pressure, page 7. Clean.

 

 

 

Fluid leaking at Flow Adjustment Nut

Damaged seal.

Relieve Pressure, page 7. Replace

 

 

seal.

 

 

 

Needle adjustment won’t adjust

Dirty threads

Clean threads

 

 

 

 

Nozzle not on gun

Put nozzle on gun

 

 

 

 

Flow nut set to maximum adjustment

Turn flow nut adjustment the other

 

 

way

 

 

 

28

310645K

Page 28
Image 28
Graco Inc 310645K manual Problem Cause Solution, Relieve Pressure, page 7. Clean