Yangdong Co. Y90 Series Spezifikationen PDF herunterladen (Seite 28)

nlarks

both

the

connecting- rod

and

{;onnecting-

rod

cap

order

avoid

.naking Qlistakes.

'fhe

connecting-

rod

bearing

shell is Inade

steel \vith high tin

aluminium

alloy.When

the

cJ\~ar3nce

between

the

connecting- rod bushes

and

crankshaft

;oumal

exceeds

the

specified

value

after

wear'n~~

severe

stripping

and

burning

occur

their

surfaces,they

must

renewed

pair.

, ,

r)urin.g

(~ngine

overhaul

rene\ving the

connecting-rod,check

the

axis parallelism

the

connecting-rod smal!

end

the large end.,which is specified

within

O.Otmm/lOOmm(both

in vertical

and

horizontal

direction).If

goes

beyond

the

scope.,alignment should

made.

Before dismantling

the

piston

and

connecting-rod asselnbly in

cylinder

·Iiner

assetpbling,

it is necessary

scrape

and

clean

the

carbon

deposit

and

greasy

dirt

the

top

part

cylinder

liner.Before assembling.,smear

some

clean

oil

the

cylinder

liner

bore,external surface

piston and piston rings"connecting- rod bearing shells and

crankshaft

jounlal.

Then

place

the

piston guide

sleeve

the

cylinder

liner,tit the piston

and

connecting

...

rod

assembly

into

the

cylinder

line'r carefullY,and tighten in turn

the

connecting-rod bolts

according

the

specified

tightening torque

Unlit

in several

separate

times.A"fter finishing

the

assembly

turn

the

c·rankshaft

Sllre

that

rotates smoothly.

IV·. Crankshaftand Flywheel

'rhe

crankshaft timing

gear

and

pulley are fitted

the

front

output

end

crankshaft.,

Positioned

the

locating pin,the flywheel is fitted

the

rear

end

tlange

the

crankshaft

with

six

bolts tightened

according

the

specified torque value.A bearing·

E60203

which

supports

the

transmission

shaft

gear·

box,is fitted

the

flange

center

the

rear

end

the

crankshaft.An

angular

calibrating line

marked

the

crankshaft

pulley and a

pointer,which

is fitted

the

cover

the

timing

gear housing,indicates

the

reading

advanced

injection angle.

A flywheel

gear

ring is·

bound

the

outside

diameter

tlywheelin

shrinkin~'

tit.r\

calibrating line,which

provides

observation for

advanced

injection angle,is marked on

the

flywheel.

V'.

Camshaft

There

is a

gear

driving the lube oil plJnlp

in'the

front

the

last

set

ofcams(facing

the

front

end).When

the

calTIshaft revolves,the

cam

the

shaft

drives the

tappets,push

rods,valve

rocker

anus

and valves,\\;hich respectively control the intake and

exhaust

valves

for

each

cylinder.

5-5

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 36 37

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