Dnepr MT9 - Page 10

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Points (junction of com-
ponents) of poss ibl e kno cks
Engine ther-
mal cond i-
tions
Connecting-rod big I Any
end- crankp in (of the
cranksha ft)
Crankshaft bearings - ~ Warmed-
crankshaft up
Va!Yc lilfl i ng- pi ni on I Snrnc
Va l ves- val ve seats I Warmed
up
Clutch disks Any
flywheel- cr an ksha ft
S ame
Engine operating Points (locations)
Nature ol knocks
conditions to be listened to
During idling
and especially
when the motor-
cycle runs after
coasting, at
s li ghtly closed
throttles
(thrott-
led down sl ig-ht-
ly)
Under loa d and
when the thrott-
les arc suddenly
opened
Idling
During id li n g-
and coast in g
Central portion
I ,\tedium pitch thud
of the engine
crankc:1sc
Crankcase, at I Lo w pitch thud
points
where bea-
rin gs
ar c located
Location
of pi- Frequent metallic
nions
ru111bling knock (of
varying tone)
Cylinder heads Frcqucn
l clear so-
und
w hi ch increases
with
increasing- ro-
. tationa I speed re-
gard less oi th e load
Continued
Conclusions regarding
further usag-e
Must not be opera ted.
Engine needs
to be
repaired
Same
lv\ay be operated.
\Vhen
rep2i ring the en- /
gine, repla ce the pinions ..
May be operated. Ad- l/
ju st the clea rance. When
rep a iring the eng ine.
lap the \'aJI·es
C lu tch released
Zone of cl utch
location
on engine
Clear
knock
metallic
I Nlay be operated.
Idling, clutch
not released
Rear
po rtion
of the e ng ine
Strong metallic
thud, which
disap-
pears when the
clutch is released
\Vhen repairi ng the c n-
gine, examine the clutch
Must not be operated.
ReiiJove the clutch and
fly11'heel, check the key
joint, fit the flywheel in
place and secure reliab-
ly