Measuring Commutator Radial Runout; Measuring Commutator Outside Diameter12-15; Measuring Undercut Depth - Mitsubishi L Series Service Manual

ELECTRICAL SYSTEM
2.4.4

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.
Item
Commutator radial runout
2.4.5 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.
Item
Commutator outside diameter
2.4.6

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
0.5 to 1.0 mm
Undercutting depth
[0.0197 to 0.0394 in.]
12-16
Standard Limit
0.03 mm 0.10 mm
[0.0012 in.] [0.0039 in.]
Standard Limit
29.4 mm 28.8 mm
[1.158 in.] [1.134 in.]
Standard Limit
0.2 mm
[0.0079 in.]
Commutator
Measuring commutator radial runout
Measuring commutator outside diameter
Undercut
Segment
Measuring commutator mica depth
Mica