Toyota 3S-GE Repair Manual page 450

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4. INSPECT UNDERCUT DEPTH
Check that the undercut depth is clean and free of
foreign materials. 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 minimum, correct it
with a hacksaw blade.
Field Coil (Field frame)
1. INSPECT FIELD COIL FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity
between the lead wire and field coil brush lead.
If there is no continuity, replace the field frame.
. INSPECT FIELD COIL FOR GROUND
Using an ohmmeter, check that there is no continuity
between the coil end and field frame.
If there is continuity, replace the field frame.
Brushes
INSPECT BRUSH LENGTH
Using a vernier caliper, measure the brush length.
Standard length:
15.0 mm (0.591 in.)
Minimum length:
8.0 mm (0.315 in.)
If the length is less than minimum, replace the brush
holder and field frame.