BM-18
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3.8. Replacing the brushes
Every 200 work hours, check the condition of the carbon brushes. To do this, unplug
the power cord, and then
remove
the cap and the brush. If the brush is shorter than
10
mm (0.4″), replace the two brushes with new ones.
Install in reverse sequence. Then, let the motor operate with no load for 20
minutes.
