Precor C944 Service Manual page 29

Replacing the Lift Motor
23. Extend the lift motor actuator 1/2" by turning the magnet hub.
Note:
To extend the lift motor actuator faster, place a screwdriver shaft in the lower mounting hole of
the lift motor and rotate the lift motor tube.
24. Position the lift motor at its mounting location.
Note:
When you perform Step 25, replace the lower screw and nut first.
25. Replace the two shoulder screws and nuts that secure the lift motor to the treadmill frame.
Note:
The original nuts used to mount the lift motor are Kep nuts, which do not require a separate
washer. If you do not use Kep nuts to mount the lift motor, use washers when you mount the lift
motor to the treadmill frame.
26. Return the treadmill to an upright position.
27. Connect the black lift motor lead to the terminal of the lift motor capacitor that already has a
black wire.
28. Connect the red lift motor lead to the terminal of the lift motor capacitor that already has a
red wire.
29. Connect the connector on the white lift motor lead that connects the lift motor to pin 4 of
lower PCA connector J3.
30. Connect the molex connector on the revolution sensor wire assembly to connector J2 on the
lower PCA.
31. Connect the two blue wires on the revolution sensor wire assembly to the terminals on the
zero sense switch terminals.
32. Calibrate the treadmill lift assembly as described in Procedure 4.1 of this appendix.
33. Check the operation of the treadmill as described in Section Three of this appendix, then
replace the hood as described in Procedure 5.1 of the Commercial Treadmill Service
Manual.
C944 Treadmill
Page 29