4-24 Repair/Replacement and Calibration Cardiac Stress Treadmills Service Manual
6. Set the dials of both calipers to zero.
7. Alternately tighten each tension adjustment screw in 0.1% increments
until both sides read 0.4%. Be sure that the pointer is exactly on the
line increment of the dial for each setting.
Caution! Do not overtighten the adjustment screws. Overtightening
can damage the walking belt and roller assemblies.
8. Remove both gauges.
9. Adjust the walking belt tracking.
Method 2: Without Calipers
♦ 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.
1. Turn both tension adjustment screws clockwise until most of the slack
is removed from the belt.
♦ Do not stretch the walking belt at this point.
2. Place two pieces of masking tape or two light pencil marks on the
right edge of the belt exactly 50.000 inches apart.
3. Repeat step 2 on the left edge of the belt.
4. Alternately turn the left and right adjustment screws one-half turn
until the distance between the tape or pencil marks is 50 13/64 inches
±1/64 on both sides.
Caution! Do not overtighten the adjustment screws. Overtightening
may damage the walking belt and roller assemblies.
5. Remove the tape.
6. Adjust the walking belt tracking.
Walking Belt Tracking
Perform this procedure:
• whenever the belt moves to one side
• after installing a new walking belt.
• each time you adjust the walking belt tension.
Warning! Do not stand on the belt when adjusting the tracking. Do
not start the treadmill when someone is on the walking belt.
1. Start the treadmill and let it run for at least one minute at minimum
speed and grade.
2. Make the following adjustment to the right adjustment screw only:
a. If the belt moves to the right, turn the screw ¼ turn clockwise.
b. If the belt moves to the left, turn the screw ¼ turn
counterclockwise.
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