Motor Brushes - CYBEX Treadmill Owner's Service Manual

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 negative brush will wear 20% faster than the positive
brush. Therefore, always measure the negative brush length to determine whether you
should replace the pair. The negative brush has a yellow lead. 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.
! CAUTION: If the drive motor is warm wait until it is cool to the touch before
! WARNING: Keep the motor dry. Do not get the inside of the motor wet.
NOTE: If you are checking and/or replacing the motor brushes follow steps 10-15. If not, skip
to step 16.
! WARNING: Wait until the armature LED is off before removing the motor brush covers.
10. Check the armature LED.
A. Observe the "armature LED" on the lower board (labeled ILT4) .
B. After the armature LED goes off proceed to step 5C.
11. Remove the drive brush access covers.
A. Squeeze each of the two rectangular brush covers to remove it from the motor. See
Figure 13.
B. Lift off the round brush cover. See Figure 13. If necessary carefully pry the cover up
using a flathead screwdriver.
Figure 13
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Cybex Pro Treadmill Owner's & Service Manual
proceeding. The inside components may be hot.