Troubleshooting

 

 

 

Problem

Cause

Solution

 

 

 

 

 

 

Speed of application slow or slower

Material too thick

Thin material.

 

 

 

 

Nozzle too small

Change nozzles to a larger size. See

 

 

Recommended Nozzle Selection

 

 

Chart, page 11.

 

 

 

 

Too much air being used.

Partially close gun air valve to reduce

 

 

air flow.

 

 

 

 

Pump hose worn

Replace hose.

 

 

 

 

Plugged or dirty gun

Relieve Pressure, page 6. Clean

 

 

gun.

 

 

 

 

Kinked hose

Unkink hose.

 

 

 

 

Gun adjustment set too low

Increase flow adjustment with flow

 

 

adjustment nut.

 

 

 

 

Too many items on same circuit

Unplug other items from circuit.

 

 

 

 

Extension cord too long or wrong

Use a different extension cord. Refer

 

gauge

to Grounding and Electric Require-

 

 

ments, page 6.

 

 

 

Intermittent flow/sputtering

Hopper connection not tight

Check gasket. TIghten connection.

 

 

 

 

Debris in system

Clean system.

 

 

 

Quick disconnect does not stay con-

Dirty or corroded fitting

Clean thoroughly. Soak in oil. Apply a

nected.

 

few drops of light oil.

 

 

 

Gun will not shut off

Worn nozzle or needle.

Relieve Pressure, page 6. Replace

 

 

worn parts.

 

 

 

 

Debris in needle passage

Relieve Pressure, page 6. Clean.

 

 

 

Fluid leaking at Flow Adjustment Nut

Damaged seal.

Relieve Pressure, page 6. Replace

 

 

seal.

 

 

 

Fluid leaking out of either plug

Missing or damaged o-rings

Relieve Pressure, page 6. Replace

 

 

o-rings.

 

 

 

 

Gun damaged

Replace gun.

 

 

 

Needle adjustment won’t adjust

Dirty threads

Clean threads.

 

 

 

 

Nozzle not on gun

Put nozzle on gun.

 

 

 

15

Page 15
Image 15
Graco 1250, 900 important safety instructions Relieve Pressure, page 6. Clean