Adjusting The Walking Belt; Belt Tension - Cardiac Science ST 55 Service Manual

Repair/Replacement and Calibration

Adjusting the Walking Belt

Belt Tension

Adjust the walking belt tension:
Whenever the belt slips or moves unsteadily during operation.
1.
After installing a new walking belt.
2.
Each time you remove or replace the walking belt or deck.
3.
Two adjustment methods are specified. Method 1 is preferred, but two belt tension
calipers are required.
Note: Both adjustment screws must be completely slack before starting this procedure.
Method 1: Using Calipers
Turn both tension adjustment screws clockwise until most of the slack is removed
1.
from the belt.
Note: Do not stretch the walking belt at this point.
Position one caliper on each side of the belt, approximately 18 inches from the rear
2.
roller assembly.
Grasp the belt with one caliper clamp.
3.
Pull the slack out of the belt with your fingers, then grasp the belt with the second
4.
clamp.
Repeat steps 4 and 5 on the other side of the belt using the other caliper.
5.
Set the dials of both calipers to zero.
6.
Alternately tighten each tension adjustment screw in 0.1% increments until both sides
7.
read 0.4%. Be sure that the pointer is exactly on the line increment of the dial for each
setting.
Caution. Damage to walking belt.
Do not overtighten the adjustment screws. Overtightening can damage the walking belt
and roller assemblies.
Remove both gauges.
8.
Adjust the walking belt tracking.
9.
Method 2: Without Calipers
Note: Both adjustment screws must be completely slack before starting this procedure.
Use this method only if two belt tension calipers are not available. An accurate measuring
device is required.
70-00298-01 A
5-32
TM 55/65 Treadmill 4.0