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Dnepr MT9 - Oil Lines; Repairing the Clutch Mechanism; Repairing the Engine Crankcase and Covers

Dnepr MT9
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Repairing the
Engine
Crankcase
and
Covers
In
the
case
of
total
or
pilrtial
disassembly
of
the
engine,
check
the
engine
crankcase
and
covers
for
good
cond
i
tion.
When
inspecting,
check
the
following:
ab
s
ence
of
cracks
or
any
other
signs
of
damage;
absence
of
dents,
burrs
on
the
j
oint
surfaces
where
gaskets
\\'ere
preYiously
installed;
surface
finish;
wear
of
fitting
places;
also,
check
that
the
studs
are
properly
secured
and
the
threads
of
screw
are
not
stripped;
that
the
breather
opening
in
the
distr
ibution
box
cover
is
not
worn
and
free of
scores
.
Eliminate
the
fault
s
detected,
if
this
is
impossible
to
do,
replace
the
compo
n
en
t
parts.
At
the
same
time, check
the
removed
bearings
for
good
condi-
tion.
Replace
the
b
ear
in
gs,
if
worn
out.
Oil Lines
In
the
case
of
total
disa
ssemb
ly of
the
engine
and
especially
when
assembling
it,
particular
care
s
hould
be
taken
to
ensure
the
correct
installation
of
the
component
parts,
proper
alignment
of
th
e lubri-
cation
ducts
and
their
cleanliness.
Repairing
the Clutch
Mechanism
After
dismantling,
wash
and
examine
the
co
mponent
parts
of
the
clutch
mechanism.
When
exa
mining,
check
the
following:
condition
of
th
e
working
surfaces
of
the
c
lut
ch
disks,
abse
nce of
scores,
wear
of
the
friction
fac
ing
s;
condition
of
the
sp
lines in
the
hub
of
the
driven
di sks;
fastening
of
the
facings
of
clutch
driven
disks;
rive
ting
of the
hubs
of c
lutch
driven
disks;
wear
of
the
clutch
pins
and
t
ightn
ess
of
their
press-fit
in
the
flywheel;
wear
of
the
openings
in
the
clutch
driving
disks;
flexibility
of
the
sp
ri11g
s.
If
sco
red
or
badly
worn
(up
.(o 0.8
mm),
the
c
lut
ch
disks
must
be
replaced.
In
case
the
openings
in
the
clutc
h
intermediate
driving
disk
are
worn
by
more
than
1
mm,
it is
permissible
to
drill
and
ream
holes
of 12.5 +O.o? dia.
at
an
ang
le
oi
30°
to
the
old
openings.
If
the
pins
are
worn
by
more
than
1
mm,
replace
them.
In
order
to
replace
the
clutch
pins,
proceed
as
follows:
66

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