INSPECTION OF STARTER Armature Coil 1. INSPECT THAT COMMUTATOR IS NOT GROUNDED Using an ohmmeter, check that there is no continuity between the commutator and armature coil core. If there is continuity, replace the armature. No continuity 2. INSPECT COMMUTATOR FOR OPEN CIRCUIT Using an ohmmeter, check that there is continuity between the segments of the commutator. If there is no continuity between any segment, replace the armature. Continuity Commutator 1. INSPECT COMMUTATOR FOR DIRTY AND BURNT SURFACES If the surface is dirty or burnt, correct 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. 3. INSPECT COMMUTATOR DIAMETER Using vernier calipers, measure the commutator diameter. Standard diameter: 30 mm (1.18 in.) Minimum diameter: 29 mm (1.14 in.) If the diameter is less than minimum, replace the armature.