Dnepr MT9 - Gear Box Disassembling into Basic Units and Reassembling; Removal of the Cover; Shafts and Gears Removal and Installation

elas tic coup ling disk and holding ba~k the driven gear oi lhe speedo-
meter drive with the aid of a screwdrive r in serted int o the gear slot;
unco tter th e nut of lhe secondary shaft, screw it off, remove the
washer and the driving disk of the propeller shaft elas tic coupling.
Was h and exam ine the removed parts . In case the teeth are found to
be wo rn oul, replace the worn parts. Re-assemble the spee dometer
drive in re verse orde r. Prior to insta ll ation, lubri cate the di sk slots
and the driven gear with grea se.
D
isasse mbling of the Gear Box into Basic Units and
Subsequent Re-assembling
Before attempting a lola] di sasse mbly of the gear box, first take
il apart into its basic units, Yi z. the cover assembly, shafts assembly ,
casing with gearshift mech an ism.
Removal of
the Cover
To remove the cover, proceed
as follows:
unscr
ew the nu t securing the key bolt of lhe s tarting mechanism
shaft, drive out the bolt, using a soft metal ma ndr el for the purpose,
and remove the kick start er lever (starl ing mechanism le ve r) from
lhe shaft; ho lding the fr ont bus hing of the starti ng mechanism shaft
by mea ns of a wrench B
3
-5265, und o two screws fastening the bush-
ing, give the bushing a half-turn clockwise, take out the bushing
togethe r with the rub ber ring from the boss in the front wall of the
cas ing;
unscrew nine bolts sec urin g th e cover to the cas ing .
Using an appli ance IlP-1693 (F ig. 21), remo\ e the cover, detach
the paperboard gasket.
When rem ov. ing the cover, the secondary shaft must be kept in
place in
the cas in g in order lo avo id damage to th e gearshift forks .
As r
ega rd s the type of their fit, the bea ring s of the rear su-pports of
the
primary and seconda ry shafts, in most cases, are f ound to be
removed from the shafts, t oge ther with -Lh e cover.
Removal
and Installation of the Shafts and Gears
The s haft s and gears are removed in the following order:
" •.. remove the idle gear, take off the washe rs and reve rse gear from
lhe seco ndar y shaft;
take out the starting mechani sm shaft together with th e quad-
rant, bushing, spring and s prin g washer;
remove the spring, starting gea rs and two thru st washers fr om
the int e rmediate shaft, ext ract the fork shaft from the opening in th e
casing, wi. thdraw the shaft with its forks from the slots of the g e·a r-
shift disk;
remove
the primar y shaft asse mbly by lightl y tapping the front
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