Dnepr MT9 - Page 68

extinguish. If the ea rl y ignition a dvance angle does not correspond
to 34±2°, adjust the breaker.
For this purpose, tu.rn the movable pl ate of the break er in one
d irection or the other by mean s of the adj u sting ecc entric . After set-
ting the eccentric, secure it with a check nut.
The l ate ignition adv ance angle in the breaker is set in the fol -
lowing manner:
set the i gnit ion advance to the "D o3.LJ,Hee" ("Lat e ") rosition by
tnrning the movab le disk counterclockwise;
turn the crank s haft in the direction of its rotation until lhe pi s-
ton is
4±2 ° before U.D.C. When do in g so, u se mark "0" (l ate) on
the flywheel as a guide. Tn this p osit ion, th e portable l amp conned-
ed into the circuit must exti nguish. Whenever the ignition ad vance
a
ng le has to be adju sted, use a special adj usting s crew provid ed on
th e
bre aker body.
Tu.
rning the scr ew forward makes the ignition advance angl e in-
crease, when the screw is turned back, the ang le decr ease s. On com-
plet ing th e adjust ment, fix the screw wi th a check nut.
In order to se t the ear ly ignition advance a ngl e in th e TIM-302
breaker, pro ceed as follows:
tum the c rank sh aft in the direction of its rotation until th e piston
is 34±2° before U.D.C. In doing this, u se mark "P" (early) on th e
flywheel
as a gui de;
· bring apart the weights of the a utomati c device a nd rotate the
breaker body, eas in g off its fixing scr ews until th e portable lamp,
co nn ected into th e circui t together with the s tor age battery, goes
out. ·
Fix the breaker body in this position, make a mark agai n st the
poi nt er on the br eake r body and sec ure the latt er with screws;
check th e gap between the s park di sc harg e rs in the ig nition coil,
which
gap mu st be within 8 a nd 9 mm. If n ecessa r y, adju st the gap.
To check the ga p in th e s park plugs, screw th e la tt er out of th e
cylind
er head s. Th e ga p between the electrodes mu st be equal to
0.5 to 0.6 mm. When ad ju sting the gap, be nd the side electrode.
To set th e expa ns io n ga p between the valve stem and the rock-
er e
nd , proceed as fo ll ows :
place a tray u nd er th e cylinder head, remo ve the cy lind er hea d
cover
and drain the o il that has accumulated;
turn the engine cranks h aft until the in let valve is clo sed (a noti-
c
eab le clearance must be provided between the in l et va lve stem and
the rocker e nd ). When this position is achieved, ad ju st th e ex hau st
valve cleara nce. For this purpose ease off the check nut and rotate
the adju st ing bolt in one direction or the other depending on wheth er
the cl ea rance h as to be incr eased or diminished. Following th at,
lighten up the check nut;
by turning the cranks haf t until the exh aust valve sta rt s to rise,
se t the clearanc e of the inlet va lve.
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