Motor Brushes - CYBEX Pro+ Owner's Service Manual

D. If you are replacing the drive belt, slip the drive belt off the front roller pulley and
discard it.
7. Attach the front roller.
A. Slide the new drive belt around the front roller.
B. Using a 9/16" socket wrench with a 3" extension, insert the two screws that fasten the
front roller to the frame. NOTE: Tighten each of the two screws evenly, making sure not to
tighten one screw too many turns before moving to the other screw. See Figure 8.
8. Secure the rear roller bolts.
A. Using a 3/4" socket wrench, tighten each rear roller bolt evenly, making sure not to tighten
either bolt too many turns before moving to the other bolt. NOTE: Do not overtighten the
belt. You will tension and center the belt in step 23C.
NOTE: If you are replacing the motor with a new one follow step 9. If not, skip to step 10.
9. Transfer the flywheel to the new motor.
A. Using a 7/16" socket wrench,
remove the flywheel, screw,
washers and motor (ansi square)
key from the old motor. See
Figure 14.
B. Place the flywheel in position on
the new motor and slide the
motor key into the slot on the
flywheel. See Figure 14.
C. Using a 7/16" socket wrench,
install the flat washer, split
washer and screw that hold the
flywheel on the motor and then
tighten securely (80 in-lbs). See
Figure 14.

Motor Brushes

NOTE: Motor brushes are wear items that will periodically need to be replaced. Both drive motor
brushes must be replaced as a pair. This will ensure even commutator contact and brush
wear. However, the one brush may wear faster than the other brush. Therefore, always
measure both brush lengths to determine whether you should replace the pair. Check
both brushes for cracks or chips.
NOTE: When "Err9" appears on screen it indicates motor brush wear. The treadmill will run 100
miles (161 kilometers) longer and then be inoperable until brushes are replaced.
Cybex Pro+ Treadmill Owner's & Service Manual
Figure 14
Screw
Split Washer
Flat Washer
Flywheel
Motor
Key
Drive
Motor
Service
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