Yanmar 3JH3E - 3-6 Inspection and Repair

Chapter 9 Electrical System
....
3._S_t_a_r_te_r_M_o_to_r
__________________________
3,4JH3(B)(C)E
3-6. Inspection and Repair
3-6.1 Armature
( 1)
Check
the diameter
of
the Commutator.
If
the outside diameter
of
the commutator is below the
minimum limit then replace
it
mm
Standard
(New)
Limit (Used)
29
28
{2) Continuity Test for the Armature Coil.
Use
a
tester
to
check
for
continuity between parallel
points
on
the
commutator.
Ii
there
is continuity,
the
armature is still good.
No
continuity : (Disconnected coil}
Replace the armature.
(3) Insulation Test for the Armature Coil.
Use a tester to check for continuity between a point on
the commutator and the shaft
or
the core.
If there is no continuity the armature is still good.
Continuity Exists : (Short circuited coil)
Replace the armature,
(4)
Check
for Surface Distortion
on
the Armature
and
the Commutator.
Use
a dial gauge to measure the distortion of the outside
surfaces
ot
the armature core and the commutator,
If
it
is
above the limit, then repair
or
replace it.
Armature
Commutator
Printed
in
]aJnln
HINSHI-H0009
Standard
(New)
0.05
(MAX)
0.05
(MAX)
mm
Limit (Used)
0.1
0.1
Fig.
17
Fig. 18
Fig. 19
Fig. 20
9-15