Dnepr MT9 - Repaired Engine Adjustment and Running-In

p.ress out the worn pins after first measuring the distance the
pin ends protrude over the flywheel edge;
press in new pins, e nsuring a grinding al l owance at the ends of
th e pins;
fit a tapered mandrel TIW-4152 and grind the pins to the size
measured before pressing out the pins.
After repai ring, check the flywheel for proper balancing. For thi s
purpose, fit the flywheel on a tap ered mandrel TIP-4875 and install
it on knife edges (TIP-4874) . The unbalance must not be greater
than 8 g·cm . If th e fa c ings of the clutch driven disks are worn, re-
" ,, move the worn i acings and rivet new ones. In case the riveted joints
become loose, close up loose rivets.
1
I.
I
I
·\
The springs of the clutc h mechanism must be of the sa me colour
marking. When the springs are compressed to 21 mm, their marl.;-
ing must correspond to the following loads, kg:
hlue
brown
·green
17 to 19
16 to 17
15 to 16
3. ADJUSTMENT AND RUNNING-IN OF REPAIRED ENGINE
After repairing and assembling, adjust and run in the engin e
to check
the qua lity of repairs and assembling and to ensure the ini-
tial wear-in of the friction parts . It is recommended that the engine
be mn-in on a test bench, using a forced air cooling.
Prior to installing the engine on the bench, adjust the follow-
ing:
breaker point ga p and ignition advance angles;
gap in the spark plugs;
gap in the valve gear.
The breaker point gap, provided the points are fully opened, must
be equal to 0.5 to 0.6 mm. To adjust the gap, case off the lock screw
securing the contact l eg (fixed contact) and move the con.tact leg in
one direction or the other by rotating th e eccentric bea d screw. On
securing the lock screw, check th e point gap once again.
To set the early ignition advance angle in the TIM-05 breaker,
do th e following: ,
set th e ignition advance to the "Pam-1ee" ("Early") position by
turning the movable disk clockwise;
connect the negative terminal of the storage baMery to "earth''
and th e positive terminal,- to the low-tension termi na l of the TIM-05
breaker, with a portable lamp ser i es-connected between these ter-
minals;
turn the crankshaft in th e direction of its rot ation until th e piston
is 34±2° before the upper dead centre (U.D.C.). In doing this, r efer
to the mark "P" (early) on the fl ywheel.
In this position, the portable lamp connected into the circuit m u st
5*
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