MMM M M MMM M M MMM M M MMM M M MMM M M MMM M MMM a. Measure the armature assembly resis- tances with the pocket tester. Pocket tester 90890-03112 Analog pocket tester YU-03112-C Armature coil Commutator resistance 1 0.0250 ~ 0.0350 Ω at 20 °C (68 °F) Insulation resistance 2 Above 1 M Ω at 20 °C (68 °F) b. If any resistance is out of specification, replace the starter motor. LLL L L LLL L L LLL L L LLL L L LLL L L LLL L LLL 5. Measure: brush length a Out of specification Replace the brushes as a set. 6. Measure: brush spring force Out of specification Replace the brush springs as a set. Brush spring force 7.65 ~ 10.01 N (780 ~ 1021 gf, 27.54 ~ 36.03 oz) 7. Check:
gear teeth Damage/wear Replace the gear. 8. Check: bearing oil seal Damage/wear Replace the defective part(s). 9 - 25 STARTER MOTOR ELEC – + ELEC – + Brush length wear limit 5.00 mm (0.20 in)