6-4. STARTER REPAIR (CONT)
Check for short circuits in armature (13)
using a growler and steel strip.
Rotate armature (13) in growler.
Hold steel strip (e.g., hacksaw blade)
across armature slots as armature
rotates. Steel strip will vibrate as slot
between shorted bars passes under steel
If short circuit is detected, check for build
up of copper dust or other conductive
material between commutator bars.
Clean out copper dust and check again for
short circuits. If commutator bars are
shorted, replace armature (13).
Check armature for grounds or open
Set multimeter to ohms, on highest scale.
Check for grounds by measuring resistance between commutator and one armature bar.
Switch multimeter to lowest scale.
Place multimeter leads against two adjacent commutator bars and observe multimeter.
Multimeter needle should swing to zero and remain.
Repeat check for all commutator bars by moving one multimeter lead at a time. There must be
continuity between each pair of bars. If there is no continuity between one or more pairs of
bars, replace armature (13).
If removed, install bushing (40) in
drive housing (22).
Install bearing (39) on drive
Position shaft support (31) and drive
clutch assembly (32) on drive
33 34 35