BT OE35, Service Manual

Page: 67 / 332

Drive Motor
PS S1.0 1700
F-code Section C-code
Version no T-code
001
© BT Products
65
Service Manual 1997-07-15
Chattering or noisy Commutator surface condition
Looseness in machine
Faulty machine adjust
High friction
Wrong brush grade See specific surface in evidence
15-16-17
10-11
6-43-45-49-52-58-59
55-58-59
Indications Appearing at Commutator Surface
Indications Immediate Causes Primary Faults
Brush chipping or breakage Commutator surface condition
Looseness in machine
Vibration
Chattering
Sluggish brush movement
See specific surface fault in
evidence
15-16-17
52
See “Chattering or noisy
brushes”
14
Rough or uneven surface 1-2-3-4-17
Dull or dirty surface 5-44-60
Eccentric surface 1-19-22-52
High commutator bar Sparking 17
Low commutator bar
streaking or threading of
surface Sparking
Copper or foreign material in
brush face
Glowing 2-25
43-44-45-46-49-59
2-3-46-47-48-61
See “Glowing at brush face”
Bar etching or burning Sparking
Flashover 2-3-7-12-30-31-32-33
5-11-14-35-38-39-41-53
Bar marking at pole
pitch spacing Sparking 25-37
Bar marking at slot
pitch spacing Sparking 7-12-30-57-60
Flat spot Sparking
Flashover
Lack of attention 19-23-25-41-53
5-11-14-35-38-39-41-53
1-5-11
Discoloration of surface High temperature
Atmospheric condition
Wrong brush grade See “Heating at commutator”
44-46
60
Raw copper surface Embedded copper
Bad service condition
Wrong brush grade See “Copper in brush face”
43-45-47-49
59-61
Rapid commutator
wear with blackened
surface Burning
Severe sparking 2-3-11-14
See “Sparking”
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