Dnepr MT10 - Ill; Running-In Conditions

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Adjust the clearance when the eng ine is cold. The clearance must
be equal t.o 0.07 mm for boll! the ex hau st a nd ini et valves.
On complet ing the adjustment of the cleara nce, lubri cate th e
rocker
pins through the central openings and close the heads with
covers.
Before
attempting the running-in, attach the gear box to th e en-
gine, install the asse mbled unit s on a running-in bench and p er-
form all necessary connections (exhaust pi pes, petrol supply, ign i-
ti on devices, in sta llation of a pressure gauge, etc.).
Prior to sta rli ng the running-in, fill the engine and gear box
with engine oil. Pour oil into the eng ine up to the upper mark of the
inserted dip st ick (the lat ter not to be screwed in), and into the gem
box- to the lo wer screw t hr eads of the filling hole.
The engine should be
subjected to running-in in accordanc e wi th
the conditions li s ted in Tabl e 8.
Table
8
Running-in Conditions
Oper:1ting
co nditions
E ngine speed,
I Opera!· I Gear en- Load on br nk€.'
r.p . m.
ing lime, I gaged
arm, J(g
tnlll
I
Col.d runnin g-in
625
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15
IV
625 15
Ill
Running-in
at higher
,, .
speeds
600 to 750 fi IV Idli ng
2000
10 IV
2.6
2600 15 IV
5.0
Afler cold running-in, drain oil from lhe su mp, wash the eng in e
\\·ith c lean oil and pour in a fresh oil. Before s tartin g the engine for
operation under idling conditions, adjust the carburettors, for which
purpose do th e following:
check
th e throttle ne edles of the both carburettors for proper sci-
ling. The needles must be set to the same ( middle) positions;
start the engine and allow it to warm up.
With the e ngine running at slow idling speed, adjust each of th e
carburettors separately, in the following order:
se t the lever to the late ignition position;
ease off the check nut secur ing the adjusting screw of the throttle
and screw in the latter until the throttle is raised and th e e ngin e
can develop a higher speed;
turn home the air-fuel ratio a djusting sc r ew and, as far as po s-
sible, reduce the engine speed, by turning back the throttle adjusting
screw;
li s tening to the engine, lurn back the air-fuel ratio adjusting
screw until such a position is achieved whereat the engine operate s
uniformly, deve
loping the ma x imum rotati o nal speed. Then turn
back th e throttle adjusting screw , reducing the rotational speed to
the least possible ste ady speed. On complet.ing the adjustm ent, fix
the screws by means of check nuts;
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