Inspection Of The Excitation Winding; Motor Element - Tomberlin E-MERGE 2007 Maintenance Manual

Fig 12-5 Brush spring elastic ity te st

Inspection of the excitation winding

The burnout or charring of the insulating material of the excitation winding means the electric motor is overheated
due to the overloaded or grounded or short circuit coil winding. In case the insulating material of the excitation
winding is charred, please replace the electric motor or the stator enclosu re component.

Motor element

1. Inspect the insulator
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2. Inspect the brush 13 for damage or heavy wear. Replace the brush when necessary.
3. Inspect the brush spring
due to being heated. Replace the spring of which the elasticity is smaller than 16 ounces (see Fig 12-5).
CAUTION
•
To inspec t the elasticity of the brush spring, it is strictly prohibited to excessive ly e xtend the spring.
Excessive force may damage the spring.
NOTE:
Commutator
Fig 12-4 Armature inspec tion and test
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4 for crack or other damages (see Fig 12-7).
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14 （see Fig 12-7). Replace the spring of which the color changes（amber or blue)
Commutator
core
Fig 12-6 Bearing inspection
146