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Contact
Breaker With
Ig
n
ition
Advance
Automatic
Device
The TIM302-0l
contact
breaker (Fig. 35)
cons ists of
body 13,
con-
tacts
3
and
4,
cam
5·
with a
centrifugal
regulator, capacitor
15,
and
cover.
6
7
8
9
I
Fig.
35.
Contact breaker with ignition
advance
automatic device
Hlv\302-01:
1
-
lock sere"·
of
contact
leg;
2
-
contact leg;
3 -
fixed
cont~ct;
4 -
brea-
ker
lever
with contact;
S-
contact breaker
cam;
6 -
plate
w1th
axles;
7-
weights;
8 -
fixed
plate;
9 -
spring
guard
;
10
-
automatic
device
securing
bolt;
I I -
automatic
device
spring:
11-
adjusting
screw:
13-
contact
brea-
ker body;
14
-
felt -fitted post;
15
-
capacitor
The body is secured
by
screws to the cover
of
the crankcase di-
stributing box using three ears
with cam
slots,
two screws, and
breaker
cover
holder.
On
releasing the screws
and
the holder, turn
the
body until
the
required ignition time is
established.
At
the
centre of
the
b
ody
is
a through
hole
into
which enters
the
E:nd
of the cam shaft having a cylindric neck with two flats
at the
end, and a threaded
hole.
The clearance between the
contacts
is
adjusted
to
0.4-
0.6
mm by
screw
12
after first
releasing lock screw
1.
The
adjusting
screw has
an eccentric
head
which
enters the slot
of.
the contact
leg.
When
the
screw is turned in
one
direction
or
the
other, the 'Contact
leg
appro-
aches the breaker lever
or moves
away
from it.
The
centrifugal
regulator (ignition
advance
automatic
device)
consists of fixed plate 8, on which are secured
two pins
used
as ax
-
les
for
weights 7.
Prior to
installing the
ignition
advance automatic
device
on the
camshaft,
sii
ghtly lubrica
te
the protruding
end
of the
shaft
a
nd the
cam hole
with grease
UHATHM-201.
When
the
camshaft is rotated, the weights tend to part, turning
on their axles. The
angle
of rotation of the weights is
adjusted
by
calibrated springs
11, one end
of w
h
ich is fastened to the
fixed
pla-
te, the
other, to the pins of cam plate. As the weights move
apart
due to engine
speed
being gradually increased, the
cam turns with
respect to
the shaft
thus
automatically
setting an
earlier ignition
ad-
vance
angle. The
cam
is
secured
against axial displacement by the
fixed plate.
73
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