Troubleshooting - Craftsman 124.47747 Operator's Manual

THE MACHINE MUST NOT BE PLUGGED IN AND THE POWER SWITCH
MUST BE IN THE 'OFF' POSITION UNTIL ADJUSTMENTS ARE COMPLETE.
PROBLEM
Motor will not start
Motor fails to develop full
power.
Motor stalls
Motor overheats
Noisy operation
Drill bit or material smokes
or burns
Drill bit wanders or
wobbles
Drill bit binds in the work
piece
Drill bit slips
Wood splinters on the
underside of work piece
Quill returns too slow or
too fast

TROUBLESHOOTING

PROBABLE CAUSE
1. Machine is not plugged in
2. Low line voltage
3. Loose connection
4. Defective switch
5. Defective motor
1. Power line is overloaded
2. Undersize wires in supply system
3. Drive belt tension is too high
4. Low line voltage
5. Motor malfunctioning
1. Overfeeding of drill bit into material
2. Dull drill bit
3. Motor malfunction, not reaching speed
1. Motor is overloaded
2. Air flow restricted on the motor
1. Excessive machine vibration
2. Dry spindle
3. Loose pulleys
4. Noisy motor
1. Drilling speed is too fast
2. Chips are not clearing out of hole
3. Dull drill bit
4. Feeding bit is too slow
5. Bit is not lubricated
1. Bit not installed correctly in the chuck
2. Bit sharpened incorrectly
3. Bit is bent or shank is damaged
1. Work piece is pinching the drill bit
2. Excessive feed rate
3. Chuck jaws are not holding bit tight
1. Bit not installed securely in the chuck
1. No supporting 'back up material' under
the work piece
1. Spindle return spring has improper
tension
1. Plug in machine
2. Check fuses or reset circuit breaker, if
using extension cord, discontinue and
plug machine directly into wall outlet
3. Check plug and all connections
4. Replace switch
5. Replace motor
1. Correct the overload condition
2. Increase supply wire size or eliminate
using an extension cord
3. Adjust belt tension
4. Have voltage checked by an electrician
and corrected, if necessary
5. Test motor to fix or replace
1. Slower feed rate of the bit into material
2. Sharpen or replace drill bit
3. Check motor capacitor and line voltage
1. Reduce load, slow down feed rate
2. Clean motor to increase air flow
1. Tighten any loose parts. Secure drill
press to the floor or plywood base
2. Lubricate spindle, quill, etc.
3. Make needed corrections
4. Check motor bearings and fan
1. Reduce drilling speed
2. Retract drill bit frequently to clear chips
3. Change or sharpen drill bit
4. Increase feed speed
5. Lubricate bit. Make sure bit and flutes
are clean of rust, resin build-up, etc.
1. Re-install bit in chuck jaws correctly
2. Sharpen bit correctly or replace bit
3. Replace bit
1. Support or clamp down the work piece
2. Slow down the feed rate
3. Tighten the chuck jaws on the bit
1. Re-install the bit tightly in the chuck
1. Use scrap board or plywood under the
work piece for support when the drill bit
bores through the work
1. Adjust spindle return spring tension
16
REMEDY
FIG. 18