CYBEX Pro+ Owner's Service Manual page 83

wear such as arcing, pitting, burning, or uneven wear. Commutator bars that are 'dirty
penny' brownish copper are in great condition. However, some commutator bars may be
pitted or blackened on one edge. Too many of these indicate a worn commutator, and the
motor should be replaced. The commutator may be cleaned with narrow commutator stone
if carbon build-up is present. NOTE: File down the stone if it won't fit in the brush holder
hole. Brush dust can be loosened from the brush holder area by lightly filing the surfaces.
B. Inspect the brushes for signs of excessive wear or cracks. The motor brushes must be
replaced if one or both is worn to 0.4" (10.2 mm) or less in length, is broken or chipped,
has a broken spring or binds in the motor. NOTE: For your convenience the decal shown
in Figure 15 is under the motor hood cover.
NOTE: If a new brush does not slide in and out easily, the edges or corners of the brush can be
lightly filed down. The motor may make a clicking noise as new brushes wear in.
14. Replace the brushes.
NOTES:If a new brush does not slide in and out easily, the edges or corners of the brush can be
lightly filed down. The motor may make a clicking noise as new brushes wear in. If you
reinstall the original brushes it is good to install them facing their original position.
Reversing the orientation of the brush can cause a clicking noise during operation until
the brushes wear in.
A. Locate the brush with the two wires and slide it into the motor brush holder (located
nearest the round access hole).
B. Locate the brush with the one wire and slide it into the motor brush holder on the
opposite side.
C. Place a spring clip under each brush and push in and down. The spring hooks will grasp
on to the end of the brush holder.
D. Using needle nose pliers, plug the yellow brush wear indicator wire onto the fast-on inside
the round access hole.
E. Using needle nose pliers, plug each brush wire onto the fast-on inside the rectangular
access hole.
15. Secure the drive motor access panels.
A. Squeeze each rectangular brush covers, insert it into the holes and then release.
B. Push the round brush cover into its hole until it is flush with the motor. NOTE: If a cover is
damaged, order Cybex replacement part number EH-16954 for the round cover or
EH-16955 for the rectangular cover.
16. Align the drive motor.
A. Carefully lower the drive motor in position on the motor saddle. NOTE: Do not crush the
speed sensor or scratch the speed decal on the flywheel.
B. Turn the motor so the exit cable is positioned at a 3 o'clock angle toward the front roller.
See Figure 16.
Cybex Pro+ Treadmill Owner's & Service Manual
Service
Page 7-19