Graco Inc 24C932, 313872B, 257999, 24C934, 24C933, TI14450a Troubleshooting, Problem Cause Solution

Troubleshooting

Troubleshooting

Follow Pressure Relief Procedure, page 22, before checking or repairing gun.

NOTICE

To prevent cross-contamination of the equipment’s wet- ted parts, never interchange component A (isocyanate) and component B (resin) parts. The gun is shipped with the A side on the left. The fluid manifold, fluid housing, side seal assembly, check valve cartridge, and mix chamber are marked on the A side.

Use the following table to check all possible problems and causes before disassembling gun. See Mainte- nance on page 24 and Repair on page 31 for refer- enced procedures.

Problem	Cause	Solution
Gun does not fully actuate when trig-	Safety lock engaged	Disengage piston safety lock
gered
	Plugged breather plug	Clean breather plug
	Damaged air valve	Replace if necessary
Fluid does not pour when gun is fully	Closed fluid valves	Open valves.
actuated
	Plugged orifice ports	Clean orifice ports
	Plugged check valves	Clean check valves
	Safety lock engaged	Disengage piston safety lock
Gun actuates slowly	Plugged breather plug	Clean breather plug
	Damaged piston o-rings	Replace air piston o-rings
	Damaged air gasket	Replace
	Dirty or damaged air valve	Clean or replace valve
Gun delays, then actuates abruptly	Cured material around the purge rod	Inspect purge rod, mix module, and
		orifices. Replace if necessary
	Empty TSL cartridge	Replace cartridge
Gun does not actuate when triggered	Air supply to gun is shut off	Open air supply
	Foam build-up around front tip	1) Clean off front tip.
		2) Use 3/4 in. wrench to loosen front
		tip 1/8 turn and re-tighten.
	Signal cable is disconnected	Connect signal cable
Pressure imbalance	Plugged orifice ports	Clean orifice ports
	Plugged check valves	Clean check valves
	Viscosities not equal	Adjust temperature or orifice needle
		to compensate
	Plugged fluid screens	Clean screens

313872B 39