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11
Trilogy
®
GP Air Spray and LVLP Gravity Fed Manual Spray Guns
© 2021 Nordson Corporation
1601056-05
Troubleshooting
WARNING:
Allow only qualified personnel to perform the following tasks. Follow the
safety instructions in this document and all other related documentation.
If you need help to solve a problem with your spray gun, contact your Nordson
representative or call the Industrial Coating Systems Customer Support Center at
(800) 433−9319. See
Problem
Possible Cause
Corrective Action
1. Irregular Pattern
Air cap not tightened correctly or dirty
Check air cap (2), clean if necessary.
Fluid nozzle installed incorrectly
Check fluid nozzle (4).
Fluid nozzle not tightened correctly
Tighten fluid nozzle.
Fluid nozzle cracked at orifice
Replace fluid nozzle.
2. Paint leaking from
packing gland
Packing gland not tightened correctly
Tighten packing gland (23) gradually until
leaking stops.
Needle seals worn
Replace seals (18, 19).
3. Pain dripping from
nozzle
Fluid nozzle loose, cracked, or worn
Tighten nozzle (4), replace nozzle if cracked
or worn.
Needle seals worn
Replace seals (18, 19).
Needle pressure spring weak
Replace spring (25).
4. Spray gun leaking air
Air seal or valve is worn
Replace seal (14) and air valve (15).
5. Spray gun leaking air
from fan adjustment
screw
Fan adjustment screw worn
Replace fan adjustment screw (12).