Cybex 425T Treadmill Service Manual
Service
Page 4-16
Motor Brushes 220 VAC
Product Numbers SK-18554
NOTES: This procedure describes the replacement of motor brushes on the 425T model
treadmill.
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 is located closest
to the front of the frame. You should still check the positive brush for cracks or chips.
It is not necessary to remove the drive motor in order to reach the motor brushes
Tools Required
• Flat head screwdriver
• Needle nose pliers
! WARNING: Keep wet items away from inside parts of the treadmill. Electrical shock
could occur even if the treadmill is unplugged. Motor brush removal and
replacement should be performed by a qualified service technician.
1. Read and understand all instructions thoroughly before installing this kit.
2. Verify the kit contents shown in
Figure 14.
A. Brush Assembly, 220 VDC (2)
B. Spring Assembly (2)
C. Cover, Brush access (2)
3. Elevate the treadmill.
A. Without standing on the belt,
press the Start key and begin
running the treadmill.
B. Press the up arrow and elevate the treadmill fully.
4. Disconnect the power.
A. While the treadmill is still fully elevated and running unplug the power cord from the wall
outlet.
B. Carefully lift the rear of the treadmill until the top of the console is resting on the ground.
Figure 14
A
B
C
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