Tundra 4WD V8-5.7L (3UR-FE) (2007)
d. Using a vernier caliper, measure the commutator diameter.
Standard diameter: 35.0 mm (1.38 in.)
Minimum diameter: 34.0 mm (1.34 in.)
If the diameter is less than the minimum, replace the armature assembly.
e. Using a dial indicator, measure the commutator runout.
Maximum commutator runout: 0.05 mm (0.00197 in.)
If the commutator's runout is greater than the maximum, correct it using a lathe.
f.
Measure the undercut depth of the commutator.
Standard undercut depth: 0.7 mm (0.0276 in.)
Minimum undercut depth: 0.2 mm (0.00787 in.)
If the undercut depth is less than the minimum, correct it with a hacksaw blade.