CHART OF COMMON DIFFICULTIES SECTION 4
Q. Commutator surface streaky
  Possible Causes Remedies
10 Oil or dirt on common commutator or slipring Clean
16 Commutator too loose Tighten, use new mica and turn
18 Commutator or slipring excentric Turning and grinding at near rated speed
20 Spring pressure too low Adjust to brush grade
22 Spring pressure unequal Adjust spring pressure uniformly
23 Imperfect brush bedding Rebed brushes carefully and clean
31 Brush sticking Check brush size - remove burns and dust
34 Brush holder mounted too far from commutator or slipring Adjust holder to be 2mm from commutator
38 Humidity too high Enclose machine or draw cooling air from humidity object
41 Long periods at low or steady load Change brush grade - ask for our recommendation

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Unit 1, 120 Shad Road,
Wadeville Ext2
Alberton
South Africa

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Alberton
1450 
South Africa

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