How to Replace a Treadmill Walking Belt

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This video from Sears PartsDirect shows how to replace a broken walking belt in some treadmills. The walking belt rotates around the front and rear rollers and slides across the walking board. A worn walking belt begins to slow down during use. If you notice jerky starts and stops with your treadmill, you may need to replace the walking belt.

(0:00) Introduction
(0:23) Step 1: Shut off the electricity
(0:27) Step 2: Remove the motor hood
(0:33) Step 3: Remove the right side foot rail
(0:46) Step 4: Remove the walking belt
(1:17) Step 5: Install the new walking belt
(1:51) Step 6: Reinstall the right foot rail
(1:55) Step 7: Reinstall the motor hood
(2:00) Step 8: Restore power
(2:02) Step 9: Check belt tracking
(2:26) Step 10: Shut off the electricity
(2:30) Step 11: Lubricate the walking board
(2:39) Step 12: Restore power and disperse the lubricant

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The video includes these parts and supplies. Look up your model to make sure you get the right parts for your treadmill.

Belt Lubricant
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Transcript:
The walking belt rotates around the front and rear rollers and slides across the walking board. A worn walking belt begins to slow down during use. Replace a worn out walking belt using the steps in this video. Before you begin, wear work gloves to protect your hands. Remove the key and unplug the treadmill’s power cord from the wall outlet. Remove the screws that attach the motor hood to the belly pan. Pull the motor hood forward and remove it from the treadmill. Fold the treadmill up and engage the latch. Remove the screws from under the walking board that fasten the right side foot rail to the platform. Release the latch and unfold the treadmill. Lift the right foot rail up and off. Turn the right side roller adjustment Allen screw to release the walking belt tension. Lift the rear roller up and out of the mounting bracket. Remove the front roller adjustment nut and screw. Lift the front roller up and out of its mounting bracket. Fold the treadmill up and engage the latch. Remove the front and rear corner screws that fasten the right side of the walking board to the frame. Release the latch and unfold the treadmill. Lift and hold the right side of the walking platform up and slide the walking belt off the board and belt rollers. Lift the right side of the walking board up and slide the new walking belt over the board and belt rollers. Fold the treadmill up and engage the latch. Reinstall the right front and right rear mounting screws to fasten the platform to the frame. Release the latch and unfold the treadmill. Position the front roller in the mounting bracket and reinstall the mounting screw and nut in their original position. Position the rear roller adjustment screw with the washers to the outer side of the mounting bracket. Rotate the adjustment screw to apply tension to the belt. When properly tensioned, you should be able to lift the edge of the walking belt 2-3 inches. Reinstall the right side foot rail and mounting screws. Release the latch and unfold the treadmill. Slide the motor hood onto the frame. Reinstall the screws that secure the hood. Plug the treadmill into the electrical outlet. Put the key in and start the treadmill. Set the speed to the slowest setting and let it run for minute or so. Do not walk on the treadmill while checking and adjusting the belt tracking. If the belt is not tracking in the center, remove the key and unplug the power cord. Use the Allen wrench supplied with the treadmill and adjust the rear rollers as needed to center the walking belt. Plug the treadmill into the electrical outlet. Repeat until belt is tracking in the center. Remove the key and unplug the treadmill’s power cord from the wall outlet. Lift the sides of the treadmill belt and evenly apply silicone lubricant to the walking board. Spread the silicone with a wood paint stirrer or similar flat item. Plug the treadmill into the electrical outlet. Run the treadmill for several minutes on medium speed while walking on the belt to disperse the lubricant evenly over the walking board.