Communtator

Commutator

Commutator (3RZ-FE):

1. INSPECT COMMUTATOR FOR DIRTY AND BURNT SURFACES
If the surface is dirty or burnt, clean it with sandpaper (No.400) or on a lathe.

2. INSPECT COMMUTATOR CIRCLE RUNOUT
a. Place the commutator on V-blocks.
b. Using a dial indicator, 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.

(5VZ-FE):

3. INSPECT COMMUTATOR DIAMETER
Using vernier calipers, measure the commutator diameter.

Standard diameter:
1.4 kW type: 30 mm (1.18 in.)
1.8 kW type: 35 mm (1.378 in.)

Minimum diameter:
1.4 kW type: 29 mm (1.14 in.)
1.8 kW type: 34 mm (1.339 in.)

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

Undercut (3RZ-FE):

4. INSPECT UNDERCUT DEPTH OF SEGMENT
Check that the undercut depth is clean and free of foreign material. Smooth out the edge.

Standard undercut depth:
1.4 kW type: 0.6 mm (0.024 in.)
1.8 kW type: 0.7 mm (0.028 in.)

Minimum undercut depth:
0.2 mm (0.008 in.)

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