Measure the commutator (A) runout. If the commutator runout is within the service limit, check the commutator for carbon dust or brass chips between the segments. If the commutator runout is not within the service limit, replace the armature. Commutator Runout D14Z6, D16V1 (KE model), D16V3 engines: Standard (New):0.05 mm (0.002 in.) max. Service Limit:0.4 mm (0.02 in.) D16V1 (KG, KR, KS models) engines with A/T: Standard (New):0.02 mm (0.001 in.) max. Service Limit:0.05 mm (0.002 in.) D16V1 (KG, KR, KS models) engine with M/T: Standard (New):0.01 mm (0.0004 in.) max. Service Limit:0.015 mm (0.0006 in.) Except D16V1 (KG, KR, KS models) engine with M/T D16V1 (KG, KR, KS models) engine with M/T

Check the mica depth (A). If the mica is too high (B), undercut the mica with a hacksaw blade to the proper depth. Cut away all the mica (C) between the commutator segments. The undercut should not be too shallow, too narrow, or V-shaped (D). Commutator Mica Depth Except D16V1 (KG, KR, KS models) engine with M/T: Standard (New):0.50-0.75 mm (0.020-0.030 in.) Service Limit:0.2 mm (0.008 in.) D16V1 (KG, KR, KS models) engine with M/T: Standard (New):0.50-0.90 mm (0.020-0.035 in.) Service Limit:0.2 mm (0.008 in.) Check for continuity between the segments of the commutator. If an open circuit exists between any segments, replace the armature.