Trackmaster TMX425 - Page 29

TRACKMASTER Troubleshooting
Front Drive Roller
1. Elevate the treadmill to approximately 12%. Turn the master power switch to the OFF
position, and unplug it 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. Turn both 5/16-in. rear roller take-up bolts counterclockwise until there is no tension
on the running belt.
3. Remove the 5/16-in. bolt that secures the front drive roller. Push the roller to the left
side of the treadmill, and then pull it out of the treadmill.
4. To install the roller, reverse the preceding steps. Ensure that the drive belt is correctly
placed on both sprockets.
5. Adjust the running belt tension and tracking.
Rear Roller (Driver Roller)
1. To remove the driver roller, follow the steps for removing the front drive roller.
2. Remove the end caps.
3. Remove the two 5/16-in rear roller take-up bolts that are used to adjust the running
belt.
4. Remove the rear roller by pulling it straight back past the side rails and then out of
the belt.
5. To install the new rear roller and reinstall the front drive roller, reverse the
preceding steps.
CAUTION Because the rollers are heavy, permitting the roller shaft to hit the ground vertically can
damage the roller bearings. Always handle rollers horizontally, and never impact the roller
shaft.
February 1, 2004 TMX425 Series Owner’s Manual 8-3