Quinton ClubTrack, Service Manual

Page: 55 / 148

16. Calibrate the grade potentiometer (see
Calibration Procedures
at end of chapter).
17. Test the treadmill grade. Verify that:
a. it operates over the full range of 0-15%.
b. there is no binding when it moves up or down.
c. the grade motor chain is aligned correctly. A popping
sound in the chain indicates that it is misaligned.
Field Functional Test
To verify that the treadmill is operating properly, perform Field
Test No. 4. See Appendix D,
Field Functional Tests, for specific
instructions.
Replacing the Pinion Shaft
1. Remove the right siderail, then remove the rack gear as
previously described in Replacing a Jammed Rack Gear
.
2. Restore treadmill power, then use the grade motor to turn the
pinion shaft until the setscrew on the grade sprocket is visible.
3. Turn off the power and treadmill circuit breaker, then unplug
the treadmill.
4. Loosen the setscrews from the grade sprocket.
5. Remove the grade motor chain as described previously.
6. Slide the pinion shaft out.
7. Slide the new pinion shaft into place: be sure to reinstall the
grade sprocket while installing the pinion shaft.
8. Replace the rack gear cover plate.
Pinion Shaft
(13044-001)
Repair/Replacement and Calibration 4-21