April 1, 2015

How to replace a table saw drive motor

By Lyle Weischwill
How to replace a table saw drive motor

This DIY repair guide explains how to replace the drive motor on a table saw. The drive motor drives the arbor shaft that turns the saw blade. If the motor wears out or locks up, the motor could run weakly or won't start at all. Replace the drive motor with the manufacturer-approved replacement part.

This procedure works for Craftsman, Companion, Tradesman and Mastercraft table saws.

Quick links
Tools required
Slot screwdriver
Socket wrench set
Pliers
Wire cutter
Wire nuts
Wire stripper
Cardboard for floor padding
Work gloves
Repair difficulty
Time required
45 minutes or less
Repair difficulty
Time required
45 minutes or less
Replacing a drive motor on a table saw

This video explains how to replace the drive motor on a table saw.

Instructions

  1. 01.

    Shut off the electricity

    Unplug the table saw’s power cord from the wall outlet.

    Wear work gloves to protect your hands.

  2. 02.

    Remove the blade guard

    Raise the blade to its highest cutting position.

    Push the red button on the blade guard and lift off the blade guard assembly.

    Raise the blade.

    Raise the blade.

    Remove the blade guard.

    Remove the blade guard.

  3. 02.

    Remove the table insert

    Pry out the table insert by inserting a slot screwdriver into the large hole in the table insert.

    Remove the table insert.

    Remove the table insert.

  4. 04.

    Remove the riving knife and anti-kickback pawl

    Loosen the blade tilt-locking knob.

    Tilt the saw blade to a 45-degree angle and tighten the blade tilt-locking knob.

    Remove the riving knife locking knob and washer.

    Remove the riving knife, mounting plate and the anti-kickback pawl.

    Tilt the saw blade to a 45-degree angle.

    Tilt the saw blade to a 45-degree angle.

    Remove the riving knife locking knob.

    Remove the riving knife locking knob.

    Remove the riving knife.

    Remove the riving knife.

  5. 05.

    Remove the saw blade

    Loosen the blade-tilt locking knob and tilt the blade to a 90-degree angle.

    Use the 2 wrenches supplied with the table saw to loosen the blade arbor nut.

    Remove the arbor nut, outer flange washer and saw blade from the arbor.

    Set the blade to 90-degrees.

    Set the blade to 90-degrees.

    Remove the blade.

    Remove the blade.

  6. 06.

    Remove the table saw support stand

    Flip the table saw upside down onto a surfaced protected with cardboard or other padding.

    Release the 4 table locking levers that secure the table saw to the support stand and remove the table saw support stand.

    Flip the saw upside down.

    Flip the saw upside down.

    Release the locking levers.

    Release the locking levers.

  7. 07.

    Remove the drive motor

    Release the 3 green ground wires from the ground wire bracket.

    Remove the On/Off switch cover mounting screws and pull off the On/Off switch cover.

    Using a wire cutter, cut the white wire at the base of the wire crimp.

    Pull the black drive motor wire off the reset switch.

    Using pliers, squeeze the sides of the strain relief on the motor wire cord attached to the On/Off switch box cover and pull out the strain relief.

    Pull the motor wires out of the On/Off switch box cover.

    Rotate the hand wheel to lower the motor to the lowest position.

    Remove the 4 motor mounting bolts and brackets.

    Pull out the motor.

    Remove the ground wires.

    Remove the ground wires.

    Remove the switch box cover.

    Remove the switch box cover.

    Cut the white wires.

    Cut the white wires.

    Release the strain relief.

    Release the strain relief.

    Pull the wires out of the switch box.

    Pull the wires out of the switch box.

    Lower the motor.

    Lower the motor.

    Remove the motor mounting bolts and brackets.

    Remove the motor mounting bolts and brackets.

  8. 08.

    Install the new motor

    Position the new motor in the saw.

    Reinstall the 4 motor mounting bolts and brackets.

    Push the motor wires into the On/Off switch box cover and reinstall the strain relief.

    Connect the black motor wire to the reset switch.

    Use the wire strippers to strip 1/4-inch of insulation from the white wire ends and then use a wire nut to connect the white wire ends.

    Reinstall the On/Off switch cover, using the mounting screws.

    Reconnect the 3 green ground wires to the ground wire bracket, using the mounting screws.

    Install the new motor.

    Install the new motor.

    Install the bolts.

    Install the bolts.

    Install the motor wires into the switch box.

    Install the motor wires into the switch box.

    Strip the ends of the white wires.

    Strip the ends of the white wires.

    Connect the wires.

    Connect the wires.

    Reinstall the switch cover.

    Reinstall the switch cover.

    Reconnect the ground wires.

    Reconnect the ground wires.

  9. 09.

    Reinstall the table saw support stand

    Position the support stand on the saw base and lock the levers to secure the stand to the saw base.

    Flip the table saw upright.

    Remount the stand on the saw base.

    Remount the stand on the saw base.

  10. 10.

    Reinstall the saw blade

    Rotate the hand wheel to raise the motor to the highest position.

    Position the blade on the arbor and reinstall the flange washer and arbor nut.

    Firmly tighten the arbor nut.

    Reinstall the saw blade.

    Reinstall the saw blade.

  11. 11.

    Reinstall the riving knife and the anti-kickback pawl

    Loosen the blade-tilt locking knob.

    Tilt the blade to 45 degrees and tighten the blade tilt locking knob.

    Reinstall the riving knife and anti-kickback pawl.

    Reinstall the mounting plate.

    Reinstall the washer and riving knife locking knob.

    Firmly tighten the riving knife locking knob.

    Tilt the saw blade to a 45-degree angle.

    Tilt the saw blade to a 45-degree angle.

    Reinstall the riving knife and anti-kickback pawl.

    Reinstall the riving knife and anti-kickback pawl.

    Reinstall the plate.

    Reinstall the plate.

    Reinstall the washer and locking knob.

    Reinstall the washer and locking knob.

  12. 12.

    Reinstall the table insert

    Push the table insert back into the top of the table.

    Reinstall the table insert.

    Reinstall the table insert.

  13. 13.

    Reinstall the blade guard

    Loosen the blade-tilt locking knob, tilt the blade to 90 degrees and then retighten the blade tilt locking knob.

    Push the red release button on the blade guard, reinstall the blade guard assembly on the riving knife and then release the red button.

    Set the blade to 90-degrees.

    Set the blade to 90-degrees.

    Reinstall the blade guard.

    Reinstall the blade guard.

  14. 14.

    Restore power

    Plug the table saw into the electrical outlet.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

Symptoms for table saws

Choose a symptom to see related table saw repairs.

Main causes: worn motor brushes, faulty drive motor, using an improper extension cord
Main causes: blade alignment needs adjustment, worn blade, bevel positive stops need adjustments, bevel pointer needs adjustment
Main causes: worn motor brushes, bad drive motor, faulty overload switch, using an improper extension cord, binding saw blade
Main causes: lack of power, broken on/off switch, bad motor overload, broken power cord, bad drive motor
Main causes: dirty saw blade, dull or damaged saw blade, blade alignment needs adjustment
Main causes: saw dust build up, blade elevating and tilting mechanisms need lubrication

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