TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COMPRESSED AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY REPAIRS, UN- PLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
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| PROBLEM | CAUSE | CORRECTION | |
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Excessive tank pressure - | Pressure switch does not shut off | Move the pressure switch lever to the “OFF” | |||
safety valve pops off. | motor when compressor reaches | position. If the outfit doesn’t shut off, and the | |||
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| electrical contacts are welded together, replace | ||
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| the pressure switch. | |
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| Pressure switch | Return the outfit to Sears Service Center to check | |
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| and adjust, or replace switch. | |
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Air leaks at fittings. | Tube fittings are not tight enough. | Tighten fittings where air can be heard escaping. | |||
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| Check fittings with soapy water solution. DO NOT | |
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| OVERTIGHTEN. | |
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Air leaks at pressure switch | Defective pressure switch release | Remove and replace the release valve. | |||
release valve. | valve. |
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| Defective flapper valve in manifold. | Check to see if the pin in the bottom of the | |
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| pressure release valve is stuck. If it does not move | |
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| freely, replace the valve. | |
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| A defective flapper valve results in a constant air | |
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| leak at the pressure release valve when there is | |
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| pressure in the tank and the compressor is shut | |
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| off. Remove and clean or replace valve. | |
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| Check valve seat damaged. | Inspect and replace upper manifold assembly. | |
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| Air leaks in air tank or at air tank | Defective air tank. | Air tank must be replaced. Do not repair the leak. | |
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| welds. |
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| DO NOT DRILL INTO, WELD OR OTHER- | |
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| WISE MODIFY AIR TANK OR IT WILL | |
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| WEAKEN. THE TANK CAN RUPTURE OR | |
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| EXPLODE. | |
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| Air leaks between head and | Leaking seal. | Torque head screws to 8 ft. lbs. If this does not | |
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| valve plate. |
| stop leak, replace seal. | |
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Pressure reading on the | It is normal for “some” pressure | If there is an excessive amount of pressure drop | |||
when the accessory is used, adjust the regulator | |||||
regulated pressure gauge | drop to occur. | ||||
following the instructions on page 7. | |||||
drops when an accessory is |
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used. |
| NOTE | |||
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| Adjust the regulated pressure under flow | |
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| conditions (while accessory is being used). | |
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D20414 Rev. 0 2/15/00 | 12 — ENG |
