Inspect Commutator 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.

7. INSPECT FIELD FRAME (FIELD COIL) FOR OPEN CIRCUIT

Using an ohmmeter, check that there is continuity between the lead wire and lield coil brush lead.

II there is no continuity, replace the field frame.

8. INSPECT FIELD FRAME (FIELD COIL) GROUND

Using an ohmmeter, check that there is no continuity between the field coil end and field frame.

If the is continuity, repair or replace the field frame.

9. INSPECT BRUSH LENGTH

Using vernier calipers, measure the brush length. Standard length: 15,5 mm (0.610 in.) Minimum length: 10.0 mm (0.394 in.) !f the length is less than minimum, replace the brush holder and field frame.

10. INSPECT BRUSH SPRING LOAD

Take the pull scale reading the instant the brush spring separates from the brush. 14 kW type

Standard spring Installed load:

17.6 - 23.5 N (1.80 - 2.40 kgf, 4.0 - 5.3 Ibf) Minimum spring installed load:

Standard spring installed load:

13.7 - 19.6 N (1.40 -2.0 kgf, 3.1 -4.6 Ibf) Minimum spring installed load:

If the installed load is not within specification, replace the brush springs.

Ohmmeter
No Continuity
Do It Yourself Car Diagnosis

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