INSPECT STARTER ARMATURE ASSEMBLY
Check the commutator for open circuit.
Using an ohmmeter, check that there is continuity between the segments of the commutator.
If there is no continuity between any segments, replace the starter armature assembly.
Check the commutator for ground.
Using an ohmmeter, check that there is no continuity between the commutator and armature core.
Check the commutator for dirt and / or burns on the surface.
If the surface is dirty or burnt, correct it with sandpaper (No.400) or a lathe.
Check for the commutator circuit runout.
Place the commutator on V-blocks.
Using a dial indicator, measure the circle runout.
| Maximum runout |
|---|
| 0.03 mm (0.0012 in.) |
If the runout is greater than maximum, replace the armature.
Using vernier calipers, measure the commutator diameter.
| Standard diameter |
|---|
| 28.0 mm (1.1024 in.) |
| Minimum diameter |
|---|
| 26.7 mm (1.0512 in.) |
Using vernier calipers, measure the undercut depth of the commutator.
| Standard depth |
|---|
| 1.5 mm (0.0591 in.) |
| Limit depth |
|---|
| 0.2 mm (0.0079 in.) |
INSPECT STARTER BRUSH HOLDER ASSEMBLY
Using vernier calipers, measure the brush length.
| Standard length |
|---|
| 10.7 mm (0.4213 in.) |
| Minimum length |
|---|
| 4.4 mm (0.1732 in.) |
If the length is less than minimum, replace the starter brush holder and starter yoke.
Using an ohmmeter, check that there is continuity between the brush lead and terminal C.
Using an ohmmeter, check that there is no continuity between the brush lead and starter yoke.
INSPECT STARTER CLUTCH SUB-ASSEMBLY
Hold the starter clutch and rotate the pinion gear clockwise, and check that it turns freely. Try to rotate the pinion gear counterclockwise and check that it locks.
If necessary, replace the starter clutch.
INSPECT MAGNET STARTER SWITCH ASSEMBLY
Check the plunger.
Push in the plunger and check that it returns quickly to its original position.
If necessary, replace the magnet starter switch.
Check the pull-in coil for open circuit.
Using an ohmmeter, check that there is continuity between terminals 50 and C.
If there is no continuity, replace the magnet starter switch.
Check whether the holding coil has an open circuit.
Using an ohmmeter, check that there is continuity between terminal 50 and the switch body.
If there is no continuity, replace the magnet starter switch.