Troubleshooting TRACKMASTER
Drive Motor Removal and Reinstallation
CAUTION Use only TRACKMASTER
® replacement parts. Using other parts may void your warranty
and cause your treadmill to malfunction.
This procedure requires the following tools:
• 1/8-in. Allen wrench
• 3/16-in. Allen wrench
• Phillips-head screwdriver
• 9/16-in. wrench
• 1/2-in. wrench
• Small flat-tip screwdriver
• 1/4-in. nut driver
• 7/16-in. wrench
1. Turn the master power switch to the OFF position, and unplug the treadmill from its
power outlet. Remove the three fasteners securing the hood, slide the rubber grommets
up the center rails, raise the hood, and secure by sliding one side over the rubber
grommet.
2. Loosen the two motor tensioning adjust nuts from the adjustment bolts, and loosen the
two nuts toward the motor.
3. Remove the ground wire at the motor
4. Remove the four nuts that secure the motor plate to the motor pan.
5. Remove the timing belt from the motor pulley.
6. Remove the drive motor assembly from the unit.
7. Remove the flywheel, timing sprocket, pulley key, and speed pick-up collar from the
old motor, and then set them aside.
8. Remove the four retaining bolts and nuts securing the motor to the motor mount plate.
9. Install the original parts onto the new motor, and reinstall them in reverse order.
10. Adjust speed pickup sensor to magnet gap at .06 in.
8-4 TMX425 Series Owner’s Manual February 1, 2004
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