TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COMPRESSED AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY REPAIRS, UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
PROBLEM | CAUSE | CORRECTION |
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Excessive tank pressure - safety | Pressure switch does not shut off | Move the pressure switch lever to the “O” |
valve pops off. | motor when compressor reaches | position. If the compressor doesn’t shut off, |
| disconnect from the electrical outlet source | |
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| and return to a Sears Service Center to re- |
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| place the pressure switch. |
| Pressure switch | Return the compressor to Sears Service Center |
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| to check and adjust, or replace switch. |
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Air leaks at fittings or hose. | Tube or hose fittings are not tight | Tighten fittings using teflon tape where air |
| enough. | can be heard escaping. Check fittings with |
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| soapy water solution. DO NOT OVER- |
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| TIGHTEN. |
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Air leaks at pressure switch | Defective pressure switch release valve. | Return to Sears Service Center for replace- |
release valve. |
| ment of pressure switch. |
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| Check to see if the pin in the bottom of the |
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| pressure release valve is stuck. If it does not |
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| move freely, return to the Service Center for |
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| replacement of pressure switch. |
| Defective or dirty check valve. | A defective check valve results in a constant |
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| air leak at the pressure release valve when |
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| there is pressure in the tank and the com- |
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| pressor is shut off. Remove and clean or re- |
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| place check valve. DO NOT OVERTIGHTEN. |
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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 |
welds. |
| leak. Return compressor to Sears Service |
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| Center. |
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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 valve | Leaking seal. | Torque head screws to |
plate. |
| does not stop leak, replace seal. |
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Pressure reading on the regu- | It is normal for some pressure drop | If there is an excessive amount of pressure |
lated pressure gauge drops when | to occur. | drop when the accessory is used, adjust the |
an accessory is used. |
| regulator. |
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| NOTE |
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| Adjust the regulated pressure under flow con- |
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| ditions (while accessory is being used). |
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Air leak from safety valve. | Possible defect in safety valve. | Operate safety valve manually by pulling on |
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| ring. If valve still leaks, it should be |
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| replaced . |
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Knocking noise | Defective check valve. | Remove and clean, or replace. |
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11 — ENG
D20015 Rev. 1 6/28/00