Subaru 1600 Service Manual page 683

, I
A9·282
Fig.
15-43
Measuring the outside dia-
meter of the commutator
3)
Run-out test
Check the commutator run-out and
replace if it exceeds the limit.
(Model:
028000-8580)
Standard
0.02
mm
(0.0008
in)
Less than
0.05
mm
(0.0020
in)
Service limit
A9-394
Fig.
15-44
Commutator run-out test
4)
Depth of segment mica
Check the depth of segment mica.
Model
0.5 - 0.8 mm
Stan-
028000-8580 (0.020 - 0.031 in)
dard
Model
0.5 - 0.9
mm
028000-8570 (0.020 - 0.035 in)
Service limit 0.2 mm (0.008 in)
Segment
Mica
\
A9-024
Fig.
15-45
Depth of segment mica
I
I",
II
ELECTRICAL SYSTEM
5) Armature short circuit test
Check armature for short circuit by
placing it on growler tester. Hold a
hacksaw blade against armature core
while slowly rotating armature. A
short-circuited armature will cause the
blade to vibrate and to be attracted to
core. If the hacksaw blade is attracted
or vibrates, the armature, which is
short-circuited, must be replaced or
repaired.
Hacksaw blade
2 Growler tester
A9-026
Fig. 15-46 Armature short-circuit test
6)
Armature ground test
Using a circuit tester, touch one probe
to the commutator segment and the
other to armature core. There should
be no continuity. If there is a con-
tinuity, armature is grounded. Replace
armature if it is grounded.
Fig.
15-47
Armature ground test
7) Armature continuity test
Using a circuit tester, touch two
probes to segments. There should be
continuity at any test points. Replace
if it is open-circuited.
15-20
'I,l. ,I,
f
I
Fig. 15-48 Armature continuity test
• Yoke
I) held ,;oil ground test
Usmg a circlIit tester, touch one probe
to field coil end or brush anJ the other
to the
bMC
surface of yoke body.
There ~tl(lUld he no
continuily.
If
th\!re is continuity, field coil is
grounded.
Be sure
to repair if it is
grounded.
-------~1..
"'---. A9-397
Fig.
15-49
Field coil ground test
2)
Field coil continuity test
Using
a
circuit tester, touch one probe
to "C" terminal lead wire and the
other to hrush.
rhue ~h()llld
he (on-
tinuity. If there is n,) continuity, Held
coil is defeCTive.
NOTE:
If
field coil is defective, yoke assembly
must be replaced.
(Model: 028000-8580)
A9-398