Place armature (21) in growler and turn power on.
Touch one test probe to armature core, other test probe to commutator as
shown. If test lamp glows, armature or commutator is grounded. Replace
With armature installed in growler and power on, hold steel blade pro-
vided with growler parallel with and touching armature core segment as
Rotate armature slowly one or more revolutions. If steel blade vibrates,
armature is shorted. Replace armature.
Turn growler power off. Position
armature in growler as shown.
Test commutator bars for abnormal
readings following directions
supplied with growler. Replace
armature if testing indicates
commutator is grounded, armature
is shorted, or if commutator
readings indicate a short, or open
or poor connection.
Turn growler power off and remove
armature from growler.
Go to Inspection, step (12) above