Buell 2002 P3 - Page 274

2002 Buell P3: Electric Starter 5-15
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NOTE
See Figure 5-19. If an undercutting machine is not available,
undercutting can be done satisfactorily using a thin hacksaw
blade. After undercutting, lightly sand the commutator with
crocus cloth to remove any burrs.
9. See Figure 5-20. Check for SHORTED ARMATURE with
a growler.
a. Place armature on growler (1).
b. Hold a thin steel strip (2) (hacksaw blade) against
armature core and slowly turn armature.
c. A shorted armature will cause the steel strip to
vibrate and be attracted to the core. Replace
shorted armatures.
10. See Figure 5-21. Check for a GROUNDED ARMATURE
with an ohmmeter or continuity tester.
a. Touch one probe to any commutator segment (1).
b. Touch the other probe to the armature core (2).
c. There should be no continuity (infinite ohms). If
there is continuity, then the armature is grounded.
Replace grounded armatures.
Figure 5-19. Undercutting Mica Separators
Mica must not be left with a
thin edge next to segments
Right way
Mica
Undercutting mica with
piece of hacksaw blade
Wrong way
Starting groove in mica
with 3 cornered file
Mica must be cut away
clean between segments
a0188x5x
Mica
Segments
Segments
Figure 5-20. Shorted Armature Test Using Growler
Figure 5-21. Grounded Armature Test
1782a
1
2
6011
12