Replacing The Tensioner - Cardiac Science ST 55 Service Manual

Replacing the Tensioner

The tensioner may need to be replaced if the poly-V drive belt slips, if the idler pulley
bearing makes noise, or if the tensioner roller is damaged.
WARNING! Compressed springs.
Do not attempt to disassemble the tensioner. The internal springs are tightly compressed
and could cause injury if released.
Remove the treadmill hood and power as described in
1.
page 5-4.
Use a 9/16 in. open end wrench to remove the 3/8 in. bolt from the base of the
2.
tensioner. Remove and discard the old tensioner.
Be sure the drive belt is centered on the motor and roller pulleys.
3.
Place the new tensioner onto the headframe in the same position as before and loosely
4.
bolt it to the headframe.
TM 55/65 Treadmill 4.0
3/8-16 x 2.50L Bolt
Split L.W.
Tensioner
Flat Washer
Poly-V Drive Belt
Replacing the Tensioner
Removing the Treadmill Hood
Alignment Marks
Large Nut 15/16
70-00298-01 A
on
5-11