Toyota Land Cruiser 1988 Repair Manual page 263

ST-6 STARTING SYSTEM- Starter
ST0040
ST001 7 ST001 8
3. INSPECT COMMUTATOR DIAMETER
Using calipers, measure the commutator diameter.
Standard diameter: 30 mm (1.18 in.)
Minimum diameter: 29 mm (1.14 in.)
If the diameter is less than minimum, replace the arma-
ture.
4. INSPECT UNDERCUT DEPTH
Check that the undercut depth is clean and free of foreign
material. Smooth out the edge.
Standard undercut depth: 0.6 mm (0.024 in.)
Minimum undercut depth: 0.2 mm (0.008 in.)
If the undercut depth is less than mi-nimum, correct it
with a hacksaw blade.
Field Frame {Field Coil)
1. INSPECT FIELD COIL FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity be-
tween the lead wire and field coil brush lead.
If there is no continuity, replace the field frame.
2. INSPECT FIELD COIL FOR -GROUND
Using an ohmmeter, check that there is no continuity
between the field coil end and field frame.
If there is continuity, repair or replace the field frame.
Brushes
INSPECT BRUSH LENGTH
Using calipers, measure the brush length.
Standard length: 13.5 mm (0.531 in.)
Minimum length: 8.5 mm (0.335 in.)
If the length is less than minimum, replace the brush
holder and field frame.