Removal and Replacement of Components
Ch. 10
TRACKMASTER
96
TMX428 TMX428CP & TMX58 Service Manual
317-160-406 Rev 4
May 2021
Tension Bolts
Rear Roller Replacement TMX428 Series
Tools Required
1/4”
Hex Socket or Flat Blade Screw Driver
3/16” Hex Wrench or Hex Socket
Approximate time to complete 45 min
1.
Turn the treadmill main power switch to the OFF position.
2.
Unplug the treadmill from the wall receptacle.
3.
Allow treadmill to discharge for 3 minutes.
4.
Remove the (5) hood securing bolts.
5.
Remove hood and set aside.
6.
Use the 3/16” Allen wrench or socket to remove the button head Allen bolt securing the
left and right end caps from the rear of the treadmill.
7.
Remove the end caps and place to the side.
8.
Use
a ¼” Allen wrench or socket to completely remove left and right tension bolts from
rear roller. When removing the tension bolts maintain equal tension on the bolts to avoid
stripping the threads on the tension bolt or roller.
9.
Use a ¼” Allen wrench or socke
t to completely remove left and right tension bolts from
rear roller. When removing the tension bolts maintain equal tension on the bolts to avoid
stripping the threads on the tension bolt or roller.
10.
Push rear roller forward as far as it will go.
11.
Use a ¼” Allen wrench or socket to remove the bolt securing the front roller to the
treadmill frame.
12.
Push the front roller from the right side of the treadmill to the left side and lift roller up;
slip timing belt off the front roller. Lift the front roller up and out of the treadmill. Use
caution to avoid pinching the timing belt.
13.
Push the rear roller from right side of the treadmill to the left side and lift roller up and
out to remove. Replace the rear roller.
14.
Slide the front roller between the running belt, place the timing belt over the sprocket of
the front roller between the running belt, and place the timing belt over the sprocket of
the front roller. Replace the front roller. Verify the guide for the belt deck and rollers is
to the left during installation. Verify the timing belt goes around the front roller sprocket
and that it is not pinched. Replace the securing bolt and tighten.
15.
Align the bolt holes on the rear roller with
the access hole of the end caps. Start the
tensioning bolts on the rear roller but do not
tighten. Replace the left and right end caps
and replace securing screws.
16.
Adjust the tension of the running belt; see
Chapter 7 Running Belt Tension
Adjustment.
