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TM
5-2420-224-34
STARTER REPAIR (CONT)
Measure length of all four starter brushes. Replace all four brushes if any one brush is worn to length of
0.34 in. (9 mm) or less.
TESTING
Place armature (1) in growler of armature test set and turn on power.
1.
2.
Touch first test probe to armature core (2) and other test probe to commutator bars (3). If lamp lights,
armature winding or commutator is grounded; replace armature.
Hold steel blade parallel with and touching armature core (2).
3.
4.
Slowly rotate armature (1) one or more revolutions. If steel blade vibrates, armature (1) is shorted;
replace armature.
14-11

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