TM 5-6115-596-14
Figure 59.
Testing armature for short circuits
c.
Brushes.
If brushes are worn to lateral wear groove in edge
of brush (maximum wear allowable), replace brushes in sets.
If
brushes are approaching wear groove when generator is received for
repair, replace brushes to extend operation time after repairs before
replacement is again necessary.
d.
Brush Springs.
Check brush springs for distortion and cracks.
Check brush spring tension as shown in figure 5-10.
Spring tension
is between 45 and 54 ounces when spring is in position with a new
brush installed.
Replace springs that are distorted, cracked, or not
within tension tolerances.
e.
Generator Housing Assembly .
(1) Visually inspect generator housing assembly, making certain
that pole shoe attaching screws are tight and staked.
(2) Inspect external insulation of field coils. If insulation
is burned or cracked, or if coils show signs of mechanical damage,
replace entire housing assembly.
(3) To test for short circuits, use same test circuit equipment
used for testing armature (fig. 5-8).
Connect one test lead to
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