Graco RS Operation And Repair Manual page 27

Problem Cause
Catalyst is present No resin
but no resin
Trigger clamp out of phase
Catalyst pump in bypass
Actuator adjustment screw missing
Trigger worn
Actuator pin worn
Trigger clamp assembly loose
Hardened material in the needle/seat area
Catalyst pressure Trigger clamp not opening evenly
drops on initial trig-
ger
Material continues to Foreign object under trigger clamp
spray after trigger is
Overspray on trigger clamp pins
released
Actuator pins sticking
Needle packing too tight
Material spraying out Retaining ring not tight
AAC ports
Cut or missing internal mix diffuser o-ring
Cut or missing external mix check valve
o-ring
Internal mix check valve seat missing or
damaged or not tight
External mix check valve seat missing or
damaged or not tight
Material not mixed External mix catalyst tips plugged
Atomizing air pressure too low
Static mixer missing
Static mixer worn
Incorrect static mixer
AAC does not func- Air supply to gun is shut off
tion
Air regulator set incorrectly
Ports plugged
AAC needle valve closed (external mix)
Trigger clamp assembly loose
3A0232ZAA
Solution
Check material fluid level
1) Adjust Trigger Clamp, page 29
2) Adjust Actuator Pin Adjustment Screws,
page 31
Turn on and make ready to spray
Replace then perform Adjust Actuator Pin
Adjustment Screws, page 31
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and torque as specified, see Adjust
Trigger Clamp on page 29
Remove needle assembly, clean and replace if
necessary
1) Adjust Trigger Clamp, page 29
2) Adjust Actuator Pin Adjustment Screws,
page 31
Clean and replace if necessary
Clean and lubricate
Clean and replace if necessary
Check and adjust needle packing tension,
see Adjust Needle Packing Tension on
page 30
Tighten retaining ring
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Clean and replace
Adjust
Replace, see Replace Internal Mix Element
on page 34.
Inspect and replace if necessary, see Replace
Internal Mix Element on page 34.
Replace if necessary, see Replace Internal
Mix Element on page 34.
Open air supply
Adjust
Clean air capped or replace
Open AAC needle valve
Adjust Trigger Clamp, page 29
Troubleshooting
27