Note: Troubleshooting problems may have similar causes and solutions.
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| POSSIBLE | CAUSE | SOLUTION |
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Excessive | current | draw | Low voltage/motor | overload | Check that power supply | is adequate | and that | compressor | is on a | |||||||||||||||||||
trips | circuit |
| breaker | or |
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| dedicated | circuit. | If using | extension | cord, | try | using | without. | If | ||||||||||
motor | reset |
| switch |
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| compressor | is connected | to a circuit | protected | by a fuse, | use dual | |||||||||||||
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| element time delay fuses (Buss Fusetron type "T" only). |
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| Drive | belt | too tight | Readjust |
| belt | tension. |
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| Restricted | air passages | Inspect and replace transfer tubes | or the check valve, (see "To replace | ||||||||||||||||||
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| or clean check valve" in the maintenance section). |
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Compressor | stalls |
| Low voltage | to motor | Furnish | adequate | power. |
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| Bad check valve |
| Replace |
| the | check valve | (see | "To replace | or clean | check | valve" in the | |||||||||||
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| maintenance |
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| Seized pump |
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| Contact | a Sears | or other | qualified | service | center. |
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Low | discharge | pressure | Air leaks |
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| Tighten or replace leaking fittings or connections. | Do not overtighten. | ||||||||||||||||||||
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| Leaking valves |
| Contact | a Sears | or other | qualified | service | center. |
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| Restricted | air intake | Clean or replace | air filter | element(s). |
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| Blown gaskets |
| Contact | a Sears | or other | qualified | service | center. |
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| Worn | piston | rings | or cylinder | Contact | a Sears | or other | qualified | service | center. |
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Compressor | pump |
| Loose motor pulley or pump | Retighten | pulley | and flywheel. | Check | alignment. |
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knocking |
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| flywheel |
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| Low oil level | in pump crankcase | Keep oil at proper level at all times. |
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| Excess carbon on valves or top of Contact a Sears or other qualified service center. |
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| 3iston |
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Oil in discharge | air |
| Worn | piston | rings | or cylinder | Contact | a Sears | or other | qualified | service | center. |
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| Restricted | air intake | Clean or replace | the | air filter element(s). |
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| Oil level too high |
| Reduce | to proper | level. |
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Overheating |
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| Poor | ventilation |
| Relocate |
| compressor | to an area with | cool, dry, well circulated air, at | ||||||||||||||||
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| least 12 in. from nearest wall. |
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| Dirty | cooling | surfaces | Clean all cooling | surfaces | thoroughly. |
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| Restricted | air passages | Inspect and replace transfer tubes | or the check valve, (see "To replace | ||||||||||||||||||
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| or clean check valve" in the maintenance section). |
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Excessive | belt | wear | Pulley out of | alignment | Realign | pulley with compressor flywheel. |
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| Improper | belt tension | Readjust. |
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| Pulley wobbles |
| Replace |
| the pulley and check for a damaged |
| crankshaft | or flywheel. | ||||||||||||||
Compressor |
| won't start | Too much back pressure in tank | Open petcock | when | starting motor. |
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in cold | temperatures |
| 40W | oil in crankcase | Use synthetic, | air compressor | oil. |
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| Compressor | too cold | Move compressor | to a warmer | location. |
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Air leaking |
| through |
| Dirty or defective | check valve. | Replace |
| or clean | the check valve (see "To replace or clean check | |||||||||||||||||||
bleeder | valve after |
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| valve" in the | maintenance | section). |
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compressor |
| shuts | off |
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12 |