Mitsubishi 3000GT - Armature Coil Open-Circuit Check; Armature Grounding Test; Armature Short-Circuit Test; Brushes and Springs Replacement

16-30
ENGINE ELECTRICAL - Starting System
E
q
C-- Wear limit line
-
New brush
Soldered
(Make sure that
there is no
excess solder on
brush surface)
Surface A
marked
Zl EL049
Growler
BRUSHES AND SPRINGS REPLACEMENT
1. Brushes that are worn beyond wear limit line, or oil-soaked,
should be replaced.
do
2. When replacing field coil brushes, crush worn brush with
pliers, being careful not to damage pigtail.
3.
4.
Sand pigtail end with sandpaper to ensure good soldering.
Insert pigtail into hole provided in new brush and solder
it.
Make sure that pigtail and excess solder do not come
out onto brush surface.
5. When replacing ground brush, slide the brush from brush
holder by prying retaining spring back.
ARMATURE TEST
ARMATURE SHORT-CIRCUIT TEST
1. Place armature in a growler.
2. Hold a thin steel blade parallel and just above while rotating
armature slowly in growler. A shorted armature will cause
blade to vibrate and be attracted to the core. Replace
shorted armature.
ARMATURE GROUNDING TEST
Check the insulation between the armature coil cores and
the commutator segments. They are normal if there is no
continuity.
ARMATURE COIL OPEN-CIRCUIT CHECK
Check for continuity between segments. The condition is nor-
mal if there is continuity.
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