Overhaul

OVERHAUL




1. REMOVE STARTER YOKE ASSEMBLY
a. Remove the nut and disconnect the terminal C wire.
b. Remove the 2 through bolts.
C. Pull out the starter yoke assembly with the armature assembly.
d. Remove the O-ring from the starter yoke assembly.

2. REMOVE STARTER BRUSH HOLDER ASSEMBLY




a. Remove the 2 screws w/O-ring and end cover from the field frame.
b. Remove the O-ring from the field frame.




c. Using a screwdriver, hold the spring back and disconnect the brush from the brush holder.
d. Disconnect the 4 brushes, and remove the brush holder.

3. REMOVE STARTER ARMATURE ASSEMBLY
a. Remove the starter armature assembly from starter yoke assembly.

4. REMOVE STARTER CLUTCH




a. Remove the 2 screws and starter drive housing.
b. Remove return spring idler gear, bearing and starter clutch assembly from the starter housing.




c. Using a magnetic finger, remove the steel ball from the clutch shaft hole.

5. INSPECT STARTER ARMATURE ASSEMBLY




a. Inspect commutator for dirty and burnt surface.
If the surface of the commutator is dirty or burned, polish the part with sandpaper (#400) or replace the armature.




b. Inspect commutator for open circuit.
1. 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.




c. Inspect commutator for ground.
1. Using an ohmmeter, check that there is no continuity between the commutator and armature core.
If there is continuity, replace the armature assembly.




d. Inspect commutator circle runout.
1. Place the armature on the V-blocks.
2. 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 on a lathe.




e. Using vernier calipers, measure the commutator diameter.

Standard diameter: 35.0 mm (1.378 in.)
Minimum diameter: 34.0 mm (1.339 in.)

If the diameter is less than minimum, replace the armature assembly.




f. Measure the undercut depth of commutator.

Standard undercut depth: 0.7 mm (0.028 in.)
Minimum undercut depth: 0.2 mm (0.008 in.)

If the undercut depth is less than the minimum, correct it with a hacksaw blade.

g. Inspect the bearings.
1. Check that the bearing rotates smoothly.




6. INSPECT STARTER YOKE ASSEMBLY
a. Inspect field coil for open circuit.
1. Using an ohmmeter, check that there is continuity between the lead wire and field coil brush lead.
If there is no continuity, replace the starter yoke assembly.




b. Inspect shunt coil for open circuit.
1. Using an ohmmeter, measure the resistance between shunt coil terminals (A) and (B).

Resistance: 1.5 - 1.9 ohm at 20°C (68°F)

If the resistance is not as specified, replace the starter yoke assembly.




7. INSPECT BRUSH
a. Using vernier calipers, measure the brush length.

Standard length: 15.0 mm (0.591 in.)
Minimum length: 9.0 mm (0.354 in.)

If the length is less than the minimum, replace the brush holder and starter yoke assembly.

8. INSPECT STARTER BRUSH HOLDER ASSEMBLY




a. Using an ohmmeter, check that there is no continuity between the positive and negative brush holders.
If there is continuity, replace the brush holder.




b. Take the pull scale reading the instant the brush spring separates from the brush.

Standard spring installed load: 21.5 - 27.5 N (2.2 - 2.8 kgf, 4.8 - 6.2 lbf)
Minimum spring installed load: 12.7 N (1.3 kgf, 2.9 lbf)

If the spring load is less than the minimum, replace the brush springs.




9. INSPECT STARTER CLUTCH
a. 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 clutch assembly.




10. INSPECT STARTER MAGNETIC SWITCH ASSEMBLY
a. Check the pull-in coil continuity.
1. Using an ohmmeter, check that there is continuity between terminals 50 and C.




b. Check the holding coil continuity.
1. 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.

11. INSTALL STARTER DRIVE HOUSING




a. Apply grease to the steel ball, return spring, clutch rollers and starter idler pinions.
b. Install the steel ball.
c. Install a new O-ring to the starter housing.
d. Insert the return spring into the magnet starter switch hole.
e. Install the starter clutch assembly, idler gear and bearing.




f. Install the starter housing to the magnet magnet switch assembly with the 2 screws.

Torque: 9.3 Nm (95 kgf.cm, 82 in.lbf)

12. INSTALL STARTER BRUSH HOLDER ASSEMBLY




a. Align the claw of the brush holder with the claw groove of the starter yoke assembly.
b. Place the brush holder on the starter yoke assembly.
c. Using a screwdriver, hold the brush spring back.
d. Connect the brush into the brush holder.
e. Connect the 4 brushes.

NOTE: Check that the positive (+) lead wires are not grounded.

f. Install a O-ring to the groove of the starter yoke.




g. Install new 2 O-rings and the end cover with the 2 screws.

Torque: 3.8 Nm (39 kgf.cm, 34 in.lbf)

13. INSTALL STARTER YOKE ASSEMBLY




a. Install a new O-ring to the groove of the starter yoke assembly.
b. Align the protrusion of the starter yoke assembly with the groove of the magnetic switch.




c. Install the starter yoke assembly with the 2 through bolts.

Torque: 9.3 Nm (95 kgf.cm, 82 in.lbf)

d. Connect the terminal C wire with the nut.

Torque: 5.9 Nm (60 kgf.cm, 52 in.lbf)