Trilogy
r
Air-Assisted Airless LT Manual Spray Gun
12
Part 1601052-03
E
2016 Nordson Corporation
Corrective Action
Possible Cause
Problem
4. Spray gun leaks paint from
packing gland
Needle cup seals worn.
Replace cup seals and O-rings
(33, 34).
Packing gland not tightened
enough.
Tighten packing gland (29).
5. Spray gun is leaking air
Air valve spring weak
Replace spring (36).
Air valve seal worn
Replace seal (39).
Air valve defective
Replace valve (37).
Repair
Preparation
WARNING:
High Pressure Hazard! Always stop the pump and relieve
system fluid pressure before attempting to repair the spray gun. Failure to
observe this warning could result in severe personal injury or even death.
1. Supply solvent to the delivery pump and flush the spray gun.
2. Stop the pump and relieve the fluid pressure. Disconnect the fluid hose.
3. Shut off the air supply and relieve the air pressure. Disconnect the air
hose.
Air Cap and Nozzle Replacement
1. See Figure 4. Remove the air cap retainer, air cap, and nozzle (1, 2, 3).
2. Push the nozzle (3) out of the air cap (2).
3. Remove the seal (3a) from the nozzle.
4. Immerse the nozzle in solvent or waterborne cleaning solution. If
necessary, use an ultrasonic cleaner to clean the nozzle. Use only tools
designed for nozzle cleaning to clean the nozzle orifice. Contact your
Nordson representative for nozzle cleaning kits.
5. Install the seal on the cleaned nozzle.
6. Install a new or clean nozzle in the air cap.
7. Install the air cap on the gun. Adjust the air cap orientation and hold it
while tightening the air cap retainer.
Needle Replacement
1. See Figure 4. Unscrew and remove the spring cap, spring, and washers
(23, 24, 25, 26).
2. Loosen the needle packing gland (29).
3. Pull the needle assembly (27, 28, 32) out of the gun.
4. Install a new needle assembly in the gun, then screw the spring cap
back into the gun and tighten securely.
5. Tighten the needle packing gland. If paint leaks from the packing gland
when the gun is put back into service, tighten the packing gland further.
