MedTrack CR60 Rehabilitation Treadmill Service Manual
Repair/Replacement and Calibration 4-19
8. Slide the new pinion shaft into place: be sure to reinstall the grade
sprocket and key while installing the pinion shaft.
9. Replace the rack gear cover plate.
10. Use a straight edge to align the grade sprocket and grade motor
sprocket, then tighten the setscrew on the socket.
11. Replace the grade motor chain as described on page 4-13.
12. Reassemble the rack gear.
13. Adjust the walk belt tension as described in “Belt Tension” on page 4-
14. Calibrate the grade potentiometer (see “Calibration Procedures” on
15. 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 misalignment.
16. If no other service is required, replace the treadmill hood as described
in step 10, page 4-5.
Field Functional Test
To verify that the treadmill is operating properly, perform “Field Test No.
4” on page D-5.
Adjusting the Grade Limit Switches
Grade limit switches prevent the treadmill from exceeding the preset
maximum grade. When a roller on the limit switch reaches a trigger in
each rack gear, a lever moves inward, opening the switch and stopping the
grade motor. Two grade limit switches, one on each side of the treadmill,
are mounted on brackets attached to the front of the headframe.
♦
Grade limit switch settings are preset at the factory and normally do not
require adjustment. They should be adjusted if the rack gear is changed.
1. Remove the power cords and treadmill hood as described in
“Removing the Treadmill Hood” on page 4-3.
2. Loosen, but do not remove, the two Phillips screws that secure each
grade limit switch to its bracket.
3. Pivot the switch on the upper screw towards, then away from, the
rack gear. You should hear a click as the switch opens or closes.
4. Set the switch wheel on a flat part of the rack gear. Pivot the switch
towards the rack gear just until it clicks, then tighten both screws.
5. If required, repeat steps 2-4 for the other grade limit switch.
6. If no other service is required, replace the treadmill hood as described
in step 10, page 4-5.
