SECTION 7: SERVICE
Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support department at (570)
Troubleshooting
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Motor will not start. | 1. | Low voltage. | 1. | Check power line voltage and correct if necessary. | |||||
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| 2. | Open circuit in motor or loose connections. | 2. | Inspect all lead connections on motor for loose or |
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| open connections. |
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Motor | will | not | start; | 1. | Short circuit in line cord or plug. | 1. | Inspect cord and plug for damaged insulation or | ||
fuses or circuit break- |
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ers blow. |
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| 2. | Short circuit in motor or loose connections. | 2. | Inspect all motor connections for loose or shorted | |
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| 3. | Incorrect fuses or circuit breakers in power |
| terminals or worn insulation. |
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| line. | 3. | Install correct fuses or circuit breakers. |
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Motor overheats. |
| 1. | Motor overloaded. | 1. | Reduce load on motor. | ||||
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Motor | stalls | (result- | 1. | Motor overloaded. | 1. | Reduce load on motor. | |||
ing in blown fuses or | 2. | Short circuit in motor or loose connections. | 2. | Inspect connections on motor for loose or shorted | |||||
tripped circuit). |
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| 3. | Low voltage. |
| terminals or worn insulation. | |||
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| 4. | Incorrect fuses or circuit breakers in power | 3. | Check power line voltage and correct if necessary. |
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| line. | 4. | Install correct fuses or circuit breakers. |
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Machine slows when | 1. | Workpiece pressure is too great. | 1. | Reduce workpiece pressure on wheel. | |||||
operating. |
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Wavy | condition | on | 1. | Machine vibrating. | 1. | Ensure machine is securely mounted. | |||
surface of work- | 2. | Workpiece not being held firmly. | 2. | Use a holding device to firmly retain the workpiece. | |||||
piece. |
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| 3. | Wheel face uneven. | 3. | Dress the grinding wheel. |
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| 4. | Wheel is too hard. | 4. | Use softer wheel, or reduce the feed rate. |
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Lines | on | surface | of | 1. | Impurity on wheel surface. | 1. | Dress the grinding wheel. | ||
workpiece. |
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| 2. | Workpiece not being held tightly. | 2. | Use a holding device to firmly retain the workpiece. | ||
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Burning | spots | or | 1. | Workpiece pressure is too great. | 1. | Reduce workpiece pressure on wheel. | |||
cracks in the work- | 2. | Coolant required. | 2. | Add an optional coolant system or cool the work- | |||||
piece. |
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| piece more frequently. |
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| 3. | Improper type of grinding wheel. | 3. | Try a wheel which is softer style or a coarser grit. |
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Wheel | dulls | quickly, | 1. | Workpiece pressure is too great. | 1. | Reduce workpiece pressure on wheel. | |||
grit falls off. |
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| 2. | Wheel is too soft. | 2. | Select a wheel with a harder bond. | ||
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| 3. | Wheel diameter too small. | 3. | Replace the wheel. |
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| 4. | Bad wheel dress. | 4. | Dress the wheel. |
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| 5. | Defective wheel bonding. | 5. | Consult manufacturer of grinding wheel. |
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Wheel | clogs | and | 1. | Wheel is too hard. | 1. | Select a wheel with a softer bond. | |||
workpiece | shows | 2. | Feed rate too slow. | 2. | Increase the rate of movement of the workpiece onto | ||||
burn marks. |
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| wheel. | ||
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| 3. | Bad wheel dress. | 3. | Dress the wheel. |
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| 4. | Coolant required. | 4. | Add an optional coolant system or cool the work- |
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| piece more frequently. |
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H7760 2" x 27" Belt Sander & 6" Grinder |
