Craftsman 21500 Operation Manual - Page 7

TROUBLESHOOTING SYMPTOM Motor will not start POSSIBLE CAUSE(S) 1. Low voltage 2. Open circuit in motor or loose connections 3. Defective switch 4. Defective capacitor Motor will not start; fuses blown or circuit breakers are tripped 1. Short circuit in line cord or plug 2. Short circuit in motor or loose connections 3. Incorrect fuses or circuit breakers in power line Motor fails to develop full 1. Power line overloaded with lights, power (power output of appliances and other motors motor decreases rapidly 2. Undersize wires or circuits too long with decrease in voltage at 3. General overloading of power motor terminals) company's facilities Motor overheats Motor overloaded Motor stalls (resulting in blown fuses or tripped circuit breakers) 1. Short circuit in motor or loose connections 2. Low voltage 3. Incorrect fuses or circuit breakers in power line 4. Motor overload Machine slows down while operating or sandpaper slips on drum 1. Applying too much pressure to workpiece 2. Spindle knob loose Wood burns while sanding; sandpaper not removing wood Sandpaper glazed or loaded with sawdust Spindle does NOT travel completely through 1″ stroke 1. Sawdust build-up below table insert 2. Damaged or loose oscillating mechanism Excessive noise Note: Normally operating sander does make some noise Spindle and motor not aligned properly CORRECTIVE ACTION 1. Check power line for proper voltage 2. Inspect all lead connections on motor for loose or open connection 3. Replace switch 4. Replace capacitor 1. Inspect line cord or plug for damaged insulation and shorted wires 2. Inspect all lead connections on motor for loose or shorted terminals or worn insulation on wires 3. Install correct fuses or circuit breakers 1. Reduce the load on the power line 2. Increase wire sizes, or reduce length of wiring 3. Request a voltage check from the power company Reduce load on motor 1. Inspect connections in motor for loose or shorted terminals or worn insulation on lead wires 2. Correct the low line voltage conditions 3. Install correct fuses or circuit breakers 4. Reduce load on motor 1. Ease up on pressure 2. Tighten spindle knob Replace sandpaper 1. Remove sawdust with vacuum 2. Inspect mechanism. Contact Sears Service Center if necessary Adjust motor and spindle alignment MAINTENANCE 7