Dnepr MT10-36 - Contact Breaker with Ignition Advance Automatic Drive

Contact Breaker With Ign it i on A dvan ce Automatic Device
The TIM302-0l contact breaker (Fig. 35) cons i sts of body 13, con-
tacts 3 and 4, cam 5· with a ce ntrifugal 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 l eg; 2 - contac t leg; 3- fixed cont~ct; 4- brea-
ke r lever with contact; S- contact breaker cam; 6- plate w1th axles; 7-
weights; 8- fixed plate; 9- spring gu ard ; 10 - automatic device securing
bolt; II- automatic devic e 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 cra n kcase di-
stributing box using three ears with cam slots , two screws, and
breaker cover holder. On releasing the screws an d 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 l eg . 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.
Pri or to installing the ignition advance automatic d evice on the
camshaft, sii ghtly lubrica te the protruding end of the shaft and 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 ad ju sted by
calibrated springs 11, one end of which is fastened to the fixed pla-
te, the other, to the pins of cam plate. As the weights move apart
due to engine sp eed being gradually increased, the cam turns with
respect to the shaft thus automatically setting an earlier ignition ad -
vance angle . The cam is secure d against axial displacement by the
fixed plate.
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