Problem Cause Solution | Graco Inc 24C933, 313872B, 257999, 24C934

Troubleshooting

Problem	Cause	Solution
Fluid does not shut off when fluid	Damaged fluid valves	Replace
valves are closed

Burst of air from muffler when gun is	Normal	No action required
triggered

Steady air leakage from muffler	Damaged air valve	Replace

	Damaged air gasket	Replace

	Damaged piston o-rings	Replace

Leak between air cylinder and fluid	Damaged o-ring	Replace
housing

Throat Seal Liquid cartridge installa-	Friction between cartridge o-rings	Lubricate cartridge o-rings and/or
tion or removal is difficult	and cartridge bore	cartridge bore with a few drops of
		Throat Seal Liquid

	Air is on	Turn air off

Throat Seal Liquid cartridge is pres-	Cartridge is empty. Temporary car-	Bleed Throat Seal Liquid cartridge
sure locked in cartridge bore	tridge pressure lock	pressure

Cannot bleed Throat Seal Liquid car-	Foam build-up in fluid housing	Inspect and clean fluid housing
tridge

Material leaking out weep ports in	Mix module and rear seal worn	Inspect and replace mix module and
fluid housing near air cylinder		rear seal, clean fluid housing

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313872B

Image 40

Graco Inc 24C933, 313872B, 257999, 24C934, 24C932, TI14450a important safety instructions Problem Cause Solution

Contents

Important Safety Instructions EP Gun Contents Related Manuals Orifice Flow Area Ratio Chart Models Fixed Orifice Flowrate Data EP Fixed Orifice Flow Data Orifice Diameter Variable Orifice Flowrate DataFlowrate 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 Changing Materials Red and B Blue Components Piston Safety Lock Throat Seal LiquidGrounding Trigger Lock Loss of Air Pressure Hook Support Hook Support 313872B Component Identification Key Cutaway View Gun Triggered Fluid Pouring Theory of OperationGun Detriggered Setup Perform Bleed Throat Seal Liquid Cartridge pro- cedure. See Adjust OrificesOrder to increase the pressure, turn the needle clockwise Follow Pressure Relief Procedure, Optional Hose Position Pressure Relief Procedure Perform Pressure Relief Procedure on ShutdownShort Term Shutdown Long Term Shutdown Maintenance Supplied Tool KitLubrication Bleed Throat Seal Liquid Cartridge Clean Outside of Gun Flush Gun Clean Fluid Manifold Clean Breather PlugFollow Pressure Relief Procedure Clean Check Valves Follow Pressure Relief Procedure on Clean Fluid Housing PassagesRemove Front End, see Clean Orifice Replace Mix Chamber and Front Seal Perform Replace Throat Seal Liquid Cartridge, Tools Required RepairReplace Throat Seal Liquid Cartridge Perform Bleed Throat Seal Liquid Cartridge pro- cedure, see Perform Pressure Relief Procedure, Remove Front End Disassemble Front End Assemble Front End Attach Front End See Attach Front End procedurePistons and Bulkhead Access Pistons Bulkhead Shaft Purge Rod Solenoid Valve 26-3.39 Nm. See Component Identification on Troubleshooting Problem Cause Solution Problem Cause Solution Electrical Diagram Parts Model 257999 Shown Orifice, Auto Hand-Held Ring Orifice, Auto Hand-Held See Orifice KitsKits on Orifice 24C751 Orifice Housing 24C756 Ring 24C805 24C815 Kits Kits Located inside back cap Impingement Kit Type and Kit Number Orifice KitsModel Iso Model Polyol Orifice Kit Kit Drill Bit Qty Orifice Size Number Drill Bit KitsKit Illustration Complete O-ring Placement Guide Ref Part Accessories Solvent Flush Pail Kit Solvent Flush Canister Kit248299 5.0 gal liter Pail Technical Data Models without Handle 6.4 lb 2.9 kg Dimensions Ref Dimension, in. mm Technical Data 313872B Graco Standard Warranty Graco Information