Service Manual
SOLENOID
Inspection/Service
Attraction Test: Connect a jumper lead from the ST terminal to the positive
terminal of a 6 volt battery. Connect a jumper lead between the C terminal
and negative terminal of a 6 volt battery. If the plunger pulls in and holds
strongly, the solenoid is good. If it doesn’t, replace the solenoid.
Retention Test: Connect a jumper lead from the ST terminal to the positive
terminal of a 6 volt battery. Connect a jumper lead between the solenoid
body and negative terminal of a 6 volt battery. Push the plunger in and
release it. If the plunger stays in, the solenoid is good. If it doesn’t, replace
the solenoid.
ARMATURE
Inspection/Service
Continuity Between Segments: Refer to Figure 1. Check for continuity
between the segments of the commutator. If there is no continuity, replace
the armature.
Armature Coil Core and Commutator Continuity: Refer to Figure 2.
Check for no continuity between the commutator and the armature coil
core. If continuity exists, replace the armature.
Armature’s Shaft and Commutator Continuity: Refer to Figure 3. Check
for no continuity between the commutator and armature’s shaft. If
continuity exists, replace the armature.
Armature Shaft and Bushing Clearance: Refer to Figures 4 and 5.
Measure the bushing inside diameter in the starter drive housing and end
frame. Measure the armature shaft outside diameter on the pinion side and
commutator side. If the clearance is not as specified in Table 1, replace the
bushing.
Starter
Electric
(continued)
Figure 5
Figure 4
Figure 3
Figure 2
Figure 1
Commutator
Segments
Armature
Coil Core
Commutator
Commutator
Armature
Shaft
Bushing
Starter Drive
Housing
Pinion side of
Armature Shaft
Electrical System Factory Min. Specification
Max.
Allowable Limit
Commutator O.D. 1.102
(28.0)
1.063
(27.0)
Difference of
Commutator O.D.’s
Less than 0.00027
(Less than 0.05)
0.016
(0.4)
Armature’s Shaft to
Bushing Clearance
0.0008
(0.02)
0.0027
(0.07)
0.0079
(0.20)
Mica Undercut 0.0177
(0.45)
0.0295
(0.75)
0.008
(0.2)
Table 1
Glossary
GLOSSARY
3-24 Demystification Guide