Honda Acura NSX 1991 Service Manual page 1070

Starting System
1. Inspect the armature for wear or damage due to
contact with the field coil magnets.
Inspect for
d a m a g e .
2 . A dirty or burnt commutator surface may be resur-
faced with emery cloth or a lathe within the follow-
ing specifications.
Commutator Diameter
Standard (New): 29.9-30.0 mm (1.177-l .I81 in)
Service Limit : 29.0 mm (1 .I4 in)
VERNIER CALIPER
23-84
Commutator Runout
Standard (New): O-0.02 mm (O-0.0008 in)
Service Limit : 0.04 mm (0.0016 in)
II
3 . If the commutator runout and diameter are within
carbon dust or brass chips between the segments.
4. If surface is dirty, recondition it with a #500 or
sary, undercut mica with a hacksaw blade to achieve
proper depth.
Commutator Mica Depth
Standard (New): 0.5-0.8 mm (0.019-0.031 in)
Service Limit : 0.2 mm (0.008 in)
D I A L
INDICATOR
COMMUTATOR
COMMUTATOR
MICA DEPTH