(2) Field coil
Field coil continuity test
(a)
Check continuity between field coil terminals. Good if
continuity exists.
If no continuity (coil disconnection), replace the field coil.
Field coil insulation test
(b)
Check continuity between field coil terminal and yoke.
Good if no continuity exists.
If continuity exists (coil short circuit), replace the
armature.
(3) Brush
Measure the length of the brush. Replace with a good
one if the length is less than the limit.
Standard
15
mm
Limit
9
149
Multimeter
Fig. 16
Multimeter
Fig. 17
Brush
Fig. 18
9. Starting motror