INSPECT STARTER ASSEMBLY
| *1 | Terminal C |
| *2 | Terminal 50 |
Perform the pull-in and holding test.
Disconnect the lead wire from terminal C.
Connect the battery to the magnetic switch as shown in the illustration.
Check that the pinion gear moves outside.
| *1 | Terminal C |
| *2 | Terminal 50 |
Disconnect the negative lead from terminal C.
Check that magneto clutch keeps the pinion gear moving outside.
Disconnect the negative lead from the switch body.
Check that the pinion gear returns.
Reconnect the lead wire to the terminal C.
| *1 | Terminal 30 |
Perform the operation test without load.
Note
These tests must be performed within 5 seconds to prevent burning out the starter motor.
Connect the battery and ammeter to the starter as shown.
Check that the pinion gear rotates smoothly.
Measure the current when the pinion gear rotates.
| Starter type | Current |
| 2.2 kW | 120 A or less |
If the current is not standard, check the starter assembly.
INSPECT STARTER ARMATURE ASSEMBLY
If the surface of the commutator is dirty or burned, polish the part with sandpaper (#400) or replace the armature.
| *1 | Commutator |
Check the commutator open circuit.
Using an ohmmeter, check that there is continuity between the segments of the commutator.
If there is no continuity between any segment, replace the armature assembly.
Check the commutator ground.
Using an ohmmeter, check that there is no continuity between the commutator and armature core.
If there is continuity, replace the armature assembly.
Check the commutator circle runout.
Place the armature on the V-blocks.
Using a dial gauge, measure the circle runout.
| Maximum circle runout |
|---|
| 0.05 mm (0.0020 in. |
If the circle runout is greater than maximum, correct it with sandpaper (#400) or replace the armature assembly.
Using vernier calipers, measure the commutator diameter.
| Diameter | ||||
|---|---|---|---|---|
|
If the diameter is less than the minimum, replace the armature assembly.
Measure the undercut depth of commutator.
| Depth | ||||
|---|---|---|---|---|
|
If the undercut depth is less than the minimum, correct it with a hacksaw blade.
Inspect the bearings.
Check that the bearing rotates smoothly. If necessary, replace them.
INSPECT STARTER YOKE ASSEMBLY
Inspect for open circuit.
Check that there is continuity between the terminal C wire and brushes.
If there is no continuity, replace the starter yoke.
Inspect for ground.
Check that there is no continuity between the terminal C wire and starter yoke body.
Check that there is no continuity between the brushes and starter yoke body.
If there is continuity, replace the starter yoke assembly.
INSPECT BRUSH
| *a | Length |
Using vernier calipers, measure the brush length.
| Brush length | ||||
|---|---|---|---|---|
|
If the length is less than the minimum, replace the brush holder and starter yoke assembly.
INSPECT STARTER BRUSH HOLDER ASSEMBLY
Using an ohmmeter, check that there is no continuity between the positive and negative brush holders.
If there is continuity, replace the brush holder.
Using a pull scale, measure the brush spring load.
| Spring load | ||||
|---|---|---|---|---|
|
If the spring load is less than the minimum, replace the brush springs.
INSPECT STARTER CLUTCH SUB-ASSEMBLY
| *a | Lock |
| *b | Free |
Check that the starter clutch operates.
If the starter clutch is does not operate, replace it.
INSPECT MAGNET STARTER SWITCH ASSEMBLY
| *1 | Terminal 50 |
| *2 | Terminal C |
Check the pull-in coil continuity.
Using an ohmmeter, check that there is continuity between terminals 50 and C.
If there is no continuity, replace the magnet starter switch assembly.
| *1 | Terminal 50 |
| *2 | Switch Body |
Check the holding coil continuity.
Using an ohmmeter, check that there is continuity between terminals 50 and switch body.
If there is no continuity, replace the magnet starter switch assembly.
| *a | Wear |
Inspect the contact plate.
Remove the 3 nuts, end cover, gasket and plunger.
Using vernier calipers, measure the contact plate for depth of wear.
| Maximum wear |
|---|
| 0.9 mm (0.035 in.) |
If the depth of wear is greater than the maximum, replace the terminal kit parts.
Install a new gasket, plunger and the end cover.