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

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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
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
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

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Contents EP Gun Important Safety InstructionsContents Related Manuals Models Orifice Flow Area Ratio ChartEP Fixed Orifice Flow Data Fixed Orifice Flowrate DataVariable Orifice Flowrate Data Orifice DiameterFlowrate gpm Variable Orifice Flowrate Data 1500 PSI Variable Orifice Flowrate Data 2000 PSI Toxic Fluid or Fumes Hazard Fire and Explosion Hazard Important Two-Component Material Information Red and B Blue Components Changing MaterialsTrigger Lock Piston Safety LockThroat Seal Liquid GroundingHook Support Loss of Air PressureHook Support 313872B Key Component IdentificationCutaway View Theory of Operation Gun Triggered Fluid PouringGun Detriggered Setup Adjust Orifices Perform Bleed Throat Seal Liquid Cartridge pro- cedure. SeeOrder to increase the pressure, turn the needle clockwise Optional Hose Position Follow Pressure Relief Procedure,Pressure Relief Procedure Long Term Shutdown Perform Pressure Relief Procedure onShutdown Short Term ShutdownBleed Throat Seal Liquid Cartridge MaintenanceSupplied Tool Kit LubricationFlush Gun Clean Outside of GunClean Breather Plug Clean Fluid ManifoldFollow Pressure Relief Procedure Clean Check Valves Clean Fluid Housing Passages Follow Pressure Relief Procedure onRemove Front End, see Clean Orifice Perform Replace Throat Seal Liquid Cartridge, Replace Mix Chamber and Front SealRepair Tools RequiredReplace Throat Seal Liquid Cartridge Perform Bleed Throat Seal Liquid Cartridge pro- cedure, see Remove Front End Perform Pressure Relief Procedure,Assemble Front End Disassemble Front EndSee Attach Front End procedure Attach Front EndPistons and Bulkhead Access Pistons Bulkhead Shaft Purge Rod 26-3.39 Nm. See Component Identification on Solenoid ValveProblem Cause Solution TroubleshootingProblem Cause Solution Electrical Diagram Model 257999 Shown PartsRing Orifice, Auto Hand-HeldOrifice, Auto Hand-Held Kits See OrificeKits on Orifice 24C751 Orifice Housing 24C756 Ring 24C805 24C815 Kits Kits Located inside back cap Orifice Kits Impingement Kit Type and Kit NumberModel Iso Model Polyol Orifice Kit Drill Bit Kits Kit Drill Bit Qty Orifice Size NumberKit Illustration Ref Part Complete O-ring Placement GuideAccessories Solvent Flush Canister Kit Solvent Flush Pail Kit248299 5.0 gal liter Pail Models without Handle 6.4 lb 2.9 kg Technical DataRef Dimension, in. mm DimensionsTechnical Data 313872B Graco Information Graco Standard Warranty