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Motor commutator cleaning
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Video Source: www.youtube.com/watch?v=ELaSnpytQtY
Increase motor speed. Contact cleaning, brushes, bushing bearings, lubrication oiling holes, fiber washers. Disassembly tips • Sewing machine electric motor disasse... • The steel wire sponge is cleaning inside the bushings and the shaft, from layers of old hardened oil that increase the friction and reduce the speed
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