Dnepr MT10-36 - Ignition System Operation; Headlamp, Dashboard, Lamps, Horn and Stop Light Switch; Servicing the Contact Breaker

The spr ing tension an d the mass of the reg ul ator we ig hts are so
se l ected tha t an increase in engine sp eed will automa
1
tka ·lly lead to
increased ignition advance an gle. As the rotatio nal speed is reduced,
the centrifugal forces dec-rease, the sp r ings become compressed re-
tu rning the weights to their position, and the i gnition advance angle
dimi nishes.
Seruicing the Contact Breaker
When operating the motorcycle, it is necessa ry to:
l. Check whether the contacts are firmly secured.
2. Make sure that the friction parts aTe clean and properly lubri -
<:a ted.
3. Every 1000 km, check th e contacts for good condi tion a nd ad -
just the clearances, if necessary . When cl eaning the contacts, remove
a pimple on one of them. It is not advisable to completely eliminate
.a !C r ate r (lfecess) on the other contact. The contacts should be gro-
und wit h a needle file or a piece of 1 mm thin abr asive disk, or a
fine-gra i ne d sa nd p aper No. 150. Following th at, clean an d wash the
contacts (using a clean petrol).
!Lubricate the breaker lever axle with a drop of machine oil.
Three or four d ro ps of the sa rp e oil will suffice to lubricate the felt.
T he axl es of th e pl ate and th e ho l es of the weights shou ld be l ubri -
cated with grease U I1 ATHM-201.
Ope rat ion of the Ignition Sys tem
When the ignition is switched on, the circuit of. the ig n ition coil
primary wi nding bec-o.mes energized and at the same time the cir-
cuit of the battery charge control lamp closes (the lamp lights up).
When the contact breaker points are opened, a high-tensio n cur-
re nt (10 000 to 15 000 V) necessary to ignite the fuel mixture is ge-
nerated in the secondary winding. The sparks are simultaneously
prod u ced b etw een the electrodes of the plugs of the left- and righ 't -
hand cylinders: one of the sparks is produced when the compr ession
stroke comes to an end in one of the cy lin ders, the other spark b eing
generated du ring exhaust stroke. As soon as the engi ne crankshaft
attains a certain speed, the re l ay contacts close and the p ower supp-
ly for the primary winding 1s switched over from the battery to the
generato r.
Headlamp, Das hb oard, Motorcycle a nd Sidecar Lamps, Horn, and Stop Light
Switch
The motorcycle is equipped with a headlamp type <D rl 37. The
headlamp .contains a high and lower beam lamp and pa'fking lamp.
The battery charge con trol lamp, oil pressure warni-ng lamp, indica-
tor lamp of gearshiit mec han ism neutral p os i tio n, turn i ndicator and
high bea m switched on lamps, interrup t er-relay of turn indicato:-s.
74