Graco 245924, Operation

Troubleshooting

311776B

9

Troubleshooting

Problem

Cause

Solution

Material will not flow from hopper

   • Material too thick

   • Not enough air

   • Gun adjustment set too low

   • Nozzle too small

   • Gun is plugged

   • Not enough material in hopper

   • Thin material

   • Open gun air valve more

   • Increase trigger travel

   • Increase nozzle size

   • Clean gun

   • Add material

Pattern too fine.

   • Material too thin

   • Air pressure too high

   • Gun needle travels too low

   • Nozzle too small

   • Thicken

   • Close gun air valve partially

   • Increase 

   • Replace nozzle with larger size

Pattern too course.

   • Material too thick

   • Air pressure too low

   • Nozzle to large

   • Thin material

   • Open gun air valve more

   • Replace nozzle with smaller size

Gun will not shut off

   • Worn nozzle or needle

   • Nozzle not on all the way

   • Debris in needle passage

   •

Relieve Pressure, page 3 and 
replace worn parts

   • Tighten completely

   •

Relieve Pressure, page 3 and 
clean

Fluid leaking at Flow Adjustment Nut    • Damaged seal

   •

Relieve Pressure, page 3 and 
replace seal

Fluid leaking out of either plug

   • Missing or damaged o-rings

   • Gun damaged

   •

Relieve Pressure, page 3 and 
replace o-ring

   • Replace gun

Needle adjustment won’t adjust

   • Dirty threads

   • Nozzle not on gun

   • Needle triggered

   • Clean threads

   • Put nozzle on gun

   • Adjust when trigger not pulled

Material leaking out around gun/hop-
per connection

   • Clamp not tight

   • Damaged gun/hopper

   • Debris between gun/hopper

   • Tighten

   • Check for damage and replace if 

needed

   • Remove hopper from gun, clean, 

and replace hopper if needed

   • Not enough material in hopper

   • Material too thin

   • Air pressure too high

   • Gun needle travels too low

   • Nozzle too small

   • Material too thick

   • Air pressure too low

   • Nozzle not on all the way

   • Debris in needle passage

Fluid leaking at Flow Adjustment Nut    • Damaged seal

Fluid leaking out of either plug

   • Missing or damaged o-rings

   • Gun damaged

   • Replace nozzle with smaller size

   •

Relieve Pressure

   • Air pressure too low

   • Nozzle to large

   • Worn nozzle or needle

   • Nozzle not on all the way

   • Air pressure too low

   • Nozzle to large

   • Worn nozzle or needle

   • Nozzle not on all the way

Fluid leaking out of either plug

   • Missing or damaged o-rings

Fluid leaking out of either plug

   • Missing or damaged o-rings

Fluid leaking out of either plug

   • Missing or damaged o-rings

Fluid leaking out of either plug

   • Missing or damaged o-rings

   •

Relieve Pressure

Relieve Pressure

   • Tighten completely

replace worn parts

   • Tighten completely