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6D3-8 SD STARTER MOTORS
REPAIR AND TESTING
INSPECTION AND REPAIR
Clean
N O T IC E : D o n o t c le a n th e s ta r te r m o to r p a rts
In a d e g re a s in g ta n k . Im m e rs in g p a rts In a-
c le a n in g s o lu tio n w ill d is s o lv e p e rm a n e n t
lu b ric a tio n a n d m a y d a m a g e e le c tric a l in s u la
tio n , c a u s in g s h o rte n e d m o to r life .
• All parts by wiping with a clean cloth.
Inspect
1. Bushing or bearing fit in the end frame and nose
housing. On models with bushings, check them, if
the bushings or bearings are damaged or worn*
replace them.
liH
•Lubricate the bushings before assembling the
starter motor. Avoid excess lubricant. Do hot
lubricate roller bearings. They are permanently
lubricated at time of manufacture.
' 'jji
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.
I
,
— Dp 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 13).
i !
• 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.
• Shorts between the commutator bars are some
times produced by brush dust or copper dust.
5. Armature for opens.
i
1. Shift Lever Assembly
2. Plunger
9. Armature
32. Drive Assembly
V1292,
• Look for loose connections where the conduc
tors join the commutator bars. Poor connections
cause arcing and burning Of the commutator.
6. Armature for grounds by using a test lamp (figure
■
14).
,
■■■
■
'
■
*
• If the test lamp lights when one test prod is
placed on the commutator and the other test
prod is placed on the armature core or shaft,
the armature is grounded.
9. Armature
68. Saw Blade
69. Growler
F4221
Figure 13—Testing the Armature for Short Circuits
Figure 12—Armature, Drive, and Shift Lever
Assembly
Figure 14—Testing the Armature for Grounds
Summary of Contents for C Series 1993
Page 1: ......
Page 12: ...OA 6 GENERAL INFORMATION Figure 11 Allison Transmission I D Location ...
Page 44: ...3B1A 2 POWER STEERING GEAR UNIT REPAIR Figure 1 710 Power Steering Gear ...
Page 62: ......
Page 75: ...3B3 2 POWER STEERING COMPONENTS TRW ROSS ...
Page 121: ...5H 16 AIR BRAKE VALVES Figure 21 Bendix Proportioning Relay Valve Components ...
Page 147: ...5J 10 AIR COMPRESSOR AND GOVERNOR 286 F9051 Figure 18 Bendix BX 2150 Compressor Components i ...
Page 204: ...MODEL 295 TBI UNIT 6C1 3 F7973 Figure 3 Model 295 TBL Unit ...
Page 251: ...6D4 6 37 MT STARTER MOTORS V3022 Figure 8 37 MT Components ...