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E. Maintenance of the Starting Motor.
1.
Removal
of the
carbon
brush.
a.
Take
off the
cover
band complete of the commutator.
b.
Loose 2 bolts fitted on the commutator end frame and
take it
aut.
c.
t
th
ca rbon
brush
pressing
spring,
By
taking
au
e
take
out
the
carbon brush
f
the field
coil and
carbon brush.
loosening the connecting
screw a
A.
3
B.
F ·
11
40
Cross se
cti
on
·of
commutator
Ig
.
-
.
2.
Commutator
C!)
Mica piece
®
Commutator ICul
®
Motor shaft
Th
e commutator
is
as
shown in Fig.
IAI while
in
use
copper pant
get wear to
turn
like
IBI.
In
such cases
its
is
reguested
to adjusts to be IAI.
I
h
a s
this adlustment
requires
highiy technics.
It
is
advisable to
rely
on specia ist sops
lunder cutting of mical
IFig.
11-401
C!)
A.c.
Generator
rotor
®
Starting clutch-outer
®
10.2X
11.5 roller
Fi
g.
11
-
41.
Generator srotor
and
torting
clutch
F.
Over
ru
nning
clutch
This transmit
rotation from the starting motor
to
the crank
shaft,
but
reversaly
from
the crank
shaft can
not rotate
th
e
starting
motor.
This construction is quite
same
with Model
C72
.
IFig.
11
-4
1
I
166
1.
If
turns the
starting motor
a
.
When
the starting
chain is pulled
along
the
direction
of arrow
as shown in the
picture.
b.
By rotating the
sprocket, the
clutch
outer
is turned
when
the roller is joined with
the starting sprocket and the
clutch outer moving
to the
narrower side.
Accordingly
the dynamo rotor
is
turned
which
is fixed with the
clutchouter
as one unit.
c
.
On the
rotor
is
fixed
on
the
crankshaft
by a key
of
4
mm.
rotation
of the
clutch
outer is
transmitted
on the crankshaft.
d.
Th
e
starting
clutch roller spring
is
usefu
l
for smooth
running
of
roller
without
any
irregular
meshing.
Furthermore
a
spring
cap is used to make smooth motions of
the
starting clutch
roller
spring and the roller.
2.
When
the
engine starts
runnin
g
a.
Rotational spped
of
th
e
crankshaft becomes faster
than that
of
th
e
sprocket.
b.
Transmission from the
starting
motor is cut, due
to centrifugal
force
on
the roller
which presses the spring and
moves
to the wider
space of
the
clutch
outer-
Fig
.
11
-
42.
Picture showing principle of function
of
th
e
overrunning
dutch
(AI
Fig.
11
-
43.
Picture
showing principle of function
of the overrunning
clutch
!B)
167
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