Troubleshooting
Troubleshooting
NOTE:
• Check all possible remedies in the troubleshooting charts before disassembling the gun.
• Some improper patterns are caused by the improper balance between air and fluid.
Problem | Cause | Solution |
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Fluid leakage from back of fluid | Worn packings or needle shaft. | Replace needle assembly (2). |
packing area. |
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Air leakage from gun. | Air valve not seating properly. | Clean or replace air valve (8). |
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Fluid leakage from front of gun. | Needle ball worn or damaged. | Replace needle assembly (2) and seat (5c). |
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| Worn seat assembly. | Replace the seat (5c) and gasket (5b, carbide |
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| models only). The gasket must be replaced |
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| whenever the seat assembly is removed. |
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| Do not reverse the direction of the plastic seat |
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| (5c, model 24C854 gun only) if it is worn. The |
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| seat must be replaced it if is worn. |
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| Fluid viscosity too low for proper | Install plastic seat (5c). |
| seal with carbide seat. |
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Fluid in air passages. | Spray tip seal leaking. | Tighten retaining ring (6) or replace spray tip |
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| (33). |
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| Leaking around seat housing. | Replace the gasket (5b, carbide models only). |
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| The gasket must be replaced whenever the |
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| seat assembly is removed. |
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| Fluid inlet fitting leaking. | Replace the fluid tube gasket (22). The gas- |
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| ket must be replaced whenever the fluid tube |
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| connector is removed. |
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Slow fluid | Fluid buildup on fluid needle | Remove and clean or replace the fluid needle |
| components. | assembly (2). |
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No fluid output when triggered. | Spray tip plugged. | Clean spray tip. See page 14. |
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| Fluid filter or fluid hose plugged. | After tip removal (see above), very slowly |
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| loosen the hose end coupling at the gun and |
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| relieve pressure gradually. Then loosen com- |
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| pletely to clear the obstruction. Clean or |
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| replace filter (12). |
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18 | 3A0149C |
