Measuring Commutator Radial Runout; Measuring Commutator Outside Diameter12-10; Measuring Undercut Depth - Mitsubishi S3Q2 Service Manual

ELECTRICAL SYSTEM
2.3.4

Measuring commutator radial runout

(1) Inspect the commutator surface. If the surface is rough,
polish it using a 400 to 600 grit sandpaper.
(2) Measure the commutator radial runout with a dial
gauge. If the measured value exceeds the limit, replace
the armature with a new one.
2.3.5 Measuring commutator outside diameter
Measure the commutator outside diameter.
If the measured value is less than the limit, replace the
armature with a new one.
2.3.6 Measuring commutator outside diameter
Measure the commutator outside diameter.
If the measured value is less than the limit, replace the
armature with a new one.
Item
Commutator outside diameter
2.3.7 Inspecting brush holder for insulation
Check that there is no continuity between each brush holder
and the brush holder base. If continuity is observed, replace
the whole brush holder assembly.
Check the brush holders for looseness.
2.3.8

Measuring undercut depth

Measure the depth of undercutting between the commutator
segments.
If the measured value is less than the limit, repair or replace
with a new part.
Item
Undercut depth
[0.0157 to 0.0236 in.]
12-10
Standard Limit
32 mm 31.4 mm
[1.26 in.] [1.236 in.]
Standard Limit
0.4 to 0.6 0.2 mm
[0.008 in.]
Measuring commutator radial runout
Measuring commutator outside diameter
Brush holder
Inspecting brush holder insulation
Undercut
Segment
Measuring commutator mica depth
Commutator
Mica