Yanmar 4JH2E Service Manual page 328

Chapter 9 Electrical System
3. Starter Motor
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4JH2
Series
Printed in Japan
AOA I 029·9002
Fig. 14
Fig. 15
Fig.
16
Fig. 17
0
Tester
Tester
EJ
0
5.
Inspectio~ a~d P.e;air
5-1 Arwa ture
(1)
Check the di2meter of the Cccmutator
If the outsiCe dia:::eter of the ccr.;i:lutator is belo;.;:
the r:iinir;ura 1
ii:!i t
the:1 replace
it.
c~m)
Standard (New) Limit (Used)
30 29
(2)
Continuity Test for the Armature Coil
Use a tester to check for continuity between
parallel points on the commutator. If 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 coi
1)
Replace the armature.
Armature Core (4) Check for Surface Distortion on the Armature
and the Commutator
Use a dial gauge to measure the distortion of the
outside surfaces of the armature core and the
commutator.
If it
is above the limit,. then repair
or replace it.
(mm)
Standard (New)
Limit (Used)
Arma lure
0. Oo
(NAX)
0.1
Commutator
0. 05
(N,\X)
0.1
9-17