Precor 9.31 Manual page 53

Procedure 6.13 - Replacing Drive Motor Brushes
1. Set the treadmill's on/off switch in the "off" position and remove the treadmill's power cord
from the A.C. outlet.
2. Remove the treadmill's motor cover.
3. Remove the bolts that retain the treadmill's power input panel and carefully move it out of
the way to gain clearance to the front of the drive motor.
4. Disconnect the motor brush wires from the Lower PCA wires. Remove the cable clamp from
the drive motor and remove the brush wires from the cable clamp. Remove the brush wires
from the cable clamp on the lift support bracket. See the illustration below.
Cable Clamp
Lower PCA Wires
5. Be sure to note that the black brush wire enters the drive motor in the rear and the red brush
wire enters the drive motor from the front.
6. Using a flat bladed screwdriver, remove the front and rear motor brush covers. Remove and
discard both brushes.
7. Set the replacement motor brush with the red wire in its mounting position in the front of the
drive motor. Set the replacement motor brush with the black wire in its mounting position in
the rear of the drive motor.
8. Press the brush spring and ferrule into the opening in the motor, feed the brush wire into the
notch in the brush cover then snap the brush cover back into place. The entire motor brush
spring and ferrule must be inside the motor. Repeat this procedure for the remaining motor
brush. See the illustration below.
(McMillan Motor Only)
9.31, 9.33, 9.35 Treadmill
Cable Clamp
Brush Wires
Page 53