Dnepr MT9 - Repairing the Generator

undo the screws and detach the ends of the field coil wires from
the output terminals of the generator;
extract the screws fastening the plug of the rear cover ball bear-
ing, remove the plug, gasket and spring cap;
by setting a lifter against the end of the armature shaft and en-
gaging it by the windows, remove the cover from the commutator
side;
withdraw the generator armature together with the front cover;
using a lifter, remove the front cover from the armature shaft;
undo the screws securing the left gl and housing and the fronl
c over, remove the housing.
Fig. 39. Generator f414
Cl ean and carefull y in spect the dismantl ed parts. Replace the de-
fective
parts, if any. Prior to re-assembling, lubricat e the bearings
with grease UHATYIM-201.
Re-assemb le the generator in reverse order.
When installing the rear cover, re mov e the brushes from the
brush holder, bearing in mind that the brush with an insulated
copper-wire rope s hould be fitted into an insulated brush holder.
When installing the gear on the generator shaft take care to en-
s ure that the plug of the generator rear cover is removed and the
s hait end rests aga in st the rigid stop.
General view of the generator is shown in F ig . 39.
Repairing the Generator
Clean the dismantled parts to remove dust and dirt.
Inspect all the parts and make sure that:
the ball bearings are in good cond iti on;
the a rm ature does not brush against the shoe of the field coi l;
the brushes do not stick in the brush hold er;
the commutator is not worn out;
there is no turn-to-turn short circuit in the armature winding
(to be checked on a special bench);
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