June 1, 2015

How to replace a treadmill drive motor

By Lyle Weischwill
How to replace a treadmill drive motor

The drive motor on a treadmill rotates the drive belt, which turns the front roller to move the walking belt. If the drive motor is weak or worn, the motor won't start and the walking belt won't move. Replace a worn treadmill drive motor with the manufacturer-approved replacement part following the steps in this DIY repair guide.

Use these basic steps to replace the drive motor in ProForm, Weslo, Horizon, Weider, Lifestyler, NordicTrack and Sole treadmills.

Quick links
Tools required
Work gloves
Phillips screwdriver
Wrench set
Repair difficulty
Time required
15 minutes or less
Repair difficulty
Time required
15 minutes or less
Replacing a drive motor on a treadmill

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

Instructions

01.

Shut off the electricity

Remove the key and unplug the treadmill power cord from the wall outlet.

Remove the key.

Remove the key.

02.

Remove the motor hood

Remove the screws securing the motor hood to the belly pan.

Pull the motor hood forward and remove it from the treadmill frame.

Remove the motor hood screws.

Remove the motor hood screws.

Remove the hood.

Remove the hood.

03.

Remove the motor

Remove the 2 motor mounting bolts from the motor mounting bracket.

Remove the motor mounting pivot bolt nut and slide the pivot bolt out.

Release the drive belt from the drive motor pulley and pull out the motor.

Disconnect the motor wires.

Remove the motor bracket mounting bolts and pull off the motor bracket.

Remove the motor mounting bolts.

Remove the motor mounting bolts.

Remove the pivot bolt.

Remove the pivot bolt.

Release the drive belt.

Release the drive belt.

Disconnect the motor wires.

Disconnect the motor wires.

Remove the motor.

Remove the motor.

Remove the bracket bolts.

Remove the bracket bolts.

Remove the motor bracket.

Remove the motor bracket.

04.

Install the new motor

Reinstall the motor bracket on the new motor.

Mount the new motor on the frame bracket and reinstall the motor mounting pivot bolt.

Loosely tighten the nut on the motor mounting pivot bolt.

Reinstall the 2 motor mounting bolts leaving the bolts loose.

Route the drive belt over the motor pulley.

Pivot the motor to tighten the tension on the drive belt and then tighten the motor mounting bolts.

Reconnect the motor wires on the new drive motor.

Install the motor bracket on the new motor.

Install the motor bracket on the new motor.

Reinstall the pivot bolt.

Reinstall the pivot bolt.

Route the drive belt over the pulley.

Route the drive belt over the pulley.

Tighten the mounting bolts.

Tighten the mounting bolts.

Reconnect the motor wires.

Reconnect the motor wires.

05.

Reinstall the motor hood

Slide the motor hood onto the frame.

Reinstall the motor hood mounting screws.

Reinstall the motor hood.

Reinstall the motor hood.

Reinstall the hood mounting screws.

Reinstall the hood mounting screws.

06.

Restore power

Plug the treadmill into the electrical outlet.

Warning: Undertaking repairs or maintenance to appliances or power equipment can be hazardous. Should you choose to undertake repairs or maintenance, you are assuming the risk of injury to your person or property. In an effort to reduce the risk, use the proper tools and safety equipment noted in the applicable 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 or maintenance, however, should only be performed by a qualified technician.
Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Main causes: bad control console, wiring failure, bad motor control board
Main causes: rear roller out of alignment, damaged walking belt, bad roller
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Main causes: faulty sensors, wiring failure, bad control console
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

How to replace a treadmill walking belt

A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using these steps.

Repair difficulty
Time required
 45 minutes or less
June 1, 2015
By Lyle Weischwill
How to replace a treadmill walking board

A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the walking board if it's worn or damaged.

Repair difficulty
Time required
 30 minutes or less
June 1, 2015
By Lyle Weischwill
How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn't run.

Repair difficulty
Time required
 15 minutes or less
Articles and videos for treadmills

Use the advice and tips in these articles and videos to get the most out of your treadmill.

December 21, 2016
How to troubleshoot treadmill problems
By Sears PartsDirect staff

See what to check if you're having a problem with your treadmill, and what you can do to fix it.

June 29, 2015
Easy DIY treadmill repairs
By Sears PartsDirect staff

Learn about treadmill repairs that you can easily do yourself.

May 10, 2015
How to maintain a treadmill
By Sears PartsDirect staff

Keep your treadmill in shape by following these tips.