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1. An ohmmeter check conductivity between each isolated brush and a plate. In the presence of conductivity, replace a shchetkoderzhatel. |
2. By spring scales or a steelyard measure effort of a spring.
Effort of a spring: 8,8 N |
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3. If effort of a spring insufficiently, replace a brush. |
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4. If the brush is worn-out to the designated limit, replace it.
Length of a brush:
The nominal: 17 mm
Maximum permissible: 11,5 mm
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