Procedure 6.5 - Replacing Drive Motor - Precor 9.31 Manual

Procedure 6.5 - Replacing Drive Motor

1. Set the treadmill circuit breaker in the "off" position and unplug the treadmill's line cord from
the A.C. outlet.
1. Remove the treadmill's motor cover.
2. The drive motor, speed sensor tooth wheel and flywheel are balanced as a matched pair.
Since the flywheel is balanced to a specific motor, flywheels and speed sensor tooth wheel
should not be removed from one and installed on a different motor. If the drive motor is
replaced, the drive motor, speed sensor tooth wheel and flywheel should be replaced as a
unit.
3. Remove the screw that fastens the speed sensor to the treadmill drive motor. See Diagram
6.4. Move the speed sensor as far from the drive motor as possible.
4. Disconnect the red and black drive motor wires at the mid-point connector between the drive
motor and the lower PCA.
5. Loosen the four drive motor mounting bolts. See Diagram 4.3. Remove the drive belt from
the drive motor pulley.
6. Set the drive motor in it's rear most mounting position (toward roller). Replace and hand
tighten the drive motor mounting screws removed in step 6. Roll the drive belt in place on
the drive motor pulley.
7. Tension the drive belt and mount the drive motor per Procedure 4.2.
8. Connect the black and red drive motor wires to the mating black and red connectors on the
lower PCA.
9. Set the speed sensor in its mounting position on the drive motor and fasten with the screw
removed in step 3. Torque the mounting screws to 25 inch pounds.
10. Re-install the motor cover.
11. Check treadmill operation per Procedure 3.
9.31, 9.33, 9.35 Treadmill
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