Quinton TM55, Service Manual

Page: 37 / 82

Cardiac Stress Treadmills Service Manual Repair/Replacement and Calibration 4-13
Grade Motor Chain
.
1. Block the treadmill headframe securely with wooden blocks to ensure
that the treadmill will not drop when you remove the grade motor.
2. Use a flathead screwdriver to pop off the C-clip master link on the
chain.
3. Slide out the master link.
4. Install the new chain, aligning it correctly on the sprockets.
5. Replace the master link.
6. Secure the C-Clip on the master link.
7. If no other service is required, replace the treadmill hood as described
in step 9 on page 4-3.
Replacing the Grade Potentiometer (Pot)
1. Remove the treadmill hood and power as described in “Removing the
Treadmill Hood” on page 4-3. Use caution throughout the following
steps.
2. Remove the two screws from the support bracket.
3. Cut the cable ties.
4. Unplug the cable from the AC Drive Module.
5. Remove the setscrew on the gear wheel.
Grade Motor
Chain
Pinion Shaft