TRACKMASTER
Ch. 10
Removal and Replacement of Components
317-160-406 Rev 4
TMX428 TMX428CP & TMX58 Service Manual
105
May 2021
Replacing the Speed Sensor 3 Wire to 3 Wire
Tools Required
1/4” Hex
Nut Driver or Flat Blade Screwdriver
Grounding Wrist Strap
Approximate time to complete: 20 min
1.
Turn the treadmill main power switch to the OFF position.
2.
Unplug the treadmill power cord from the wall receptacle.
3.
Allow the treadmill to discharge for 1 minute.
4.
Remove existing 3 wire sensor.
5.
Slide replacement 3 Wire Speed Sensor thru rubber grommet.
CAUTION: Use ESD precautions, including wearing a grounding wrist strap that is
connected to an exposed metal connection point on the treadmill chassis.
6.
Adjust the speed sensor to the magnet on the flywheel to approximately 1/4”
7.
After replacing Speed Sensor, Perform
Belt Speed Calibration Procedure