Toyota 4-Runner 1985 Repair Manual page 301

ST-6 STARTING SYSTEM - Starter
ST0014
M5044
STOOlS
ST0016
ST0017 STOOlS
3. MEASURE DIAMETER OF COMMUTATOR
If the diameter of the commutator is less than the
minimu~
replace the armature.
Standard diameter: 30 mm (1.18 in.)
Minimum diameter: 29 mm (1.14 in.)
4.
INSPECT UNDERCUT DEPTH
Check that the undercut depth is clean and free of foreign
particles. Smooth out the edge.
If the undercut depth is less than the minimum, correct it
with a hacksaw blade.
Standard undercut depth: 0.5 - 0.8 mm
(0.020 - 0.031 in.)
Minimum undercut depth: 0.2 mm (0.008 in.)
Field Coil
1 . INSPECT FIELD COIL FOR OPEN CIRCUIT
Using an ohmmeter, check for continuity between the Ie .
wire and field coil brush lead.
If there is no continuity, replace the field frame.
2. INSPECT THAT FIELD COIL IS NOT GROUNDED
Using an ohmmeter, check for continuity between the field
coil end and field frame.
If there is continuity, replace the field frame.
Brushes
MEASURE BRUSH LENGTH
If length is less than the minimum, replace the brush and
dress with an emery cloth.
Standard length: 1.0 kW 13.0 mm (0.512 in.)
1.4 kW 15.0 mm (0.591 in.)
Minimum length:
1.0 kW 8.5 mm (0.335 in.)
1.4 kW 10.0 mm (0.394 in.)