GMC T Series 1994 Repair Manual page 582

1. Shift Lever Assembly
2. Plunger
9. Armature
32. Drive Assembly
Figure 11— Armature, Drive, and Shift Lever
Assembly
CLEANING , IN SPECTIO N , AND
ELECTRICAL TESTS
I f f
Clean
N O T IC E : D o n o t c le a n th e s t a r t e r m o t o r p a r t s
in a d e g r e a s in g ta n k . Im m e r s in g p a r t s in a
c l e a n in g s o l u t i o n w il l d is s o lv e p e r m a n e n t
lu b r ic a t io n a n d m a y d a m a g e e le c t r ic a l in s u la ­
tio n , c a u s in g s h o r t e n e d m o t o r life .
• All parts by wiping with a clean cloth.
L*
Inspect (Figures 12 through 17)
1. Bushing or armature bearing fit in the end frame,
lever housing, and drive end frame housing. If the
bushings or bearings are dam aged or worn,
replace them.
• Lubricate the bushings before assembling the
starter motor. Avoid excessive lubrication. Do
not lubricate roller bearings. They are perma­
nently lubricated at time of manufacture.
2. Armature shaft for runout or scoring. Replace the
armature assembly if the condition of the armature
shaft is doubtful.
3. Commutator for discolored or uneven conductors.
— Do not turn the commutator.
— Do not undercut the insulation.
— Clean the commutator with No. 240 grit emery
cloth. Blow away any copper dust present. If
the commutator cannot be cleaned, replace the
armature.
4. Armature for short circuits (figure 12).
• Rotate the armature in a growler with a steel
strip, such as a hacksaw blade, held on the
armature parallel to the shaft. The steel strip
will vibrate on the area of the short circuit.
V1292
INSPECTION
• Shorts between the commutator bars are some­
times produced by brush dust or copper dust.
5. Armature for opens.
• Look for loose connections where the conduc­
tors join th,e commutator bars. Poor connections
cause arcing and burning of the commutator.