Yangdong Co. Y90 Series Especificaciones descargar pdf (Pagina 22)

guiding

surface

of

the

needle

valve

and

nozzle

body

is

not

smooth

enough,it

may

be

lapped with

a little bit

of

clean fuel oil,then

clean

off

any

metal particulates in

clean

fue1.While lapping

of

needle

valve with

nozzle

body

..

never

knock

the

needle

valve

against

the

body.

IV . Ad.iustment

of

Lube

Oil

Pressure

See

fig.3.Lossen

the

lock

nut

and

turn

the

adjusting

screw

with a

wrench

to

take

the

lube

oil

pressure within

200

.'~

400kPa(in

cold

state the

pressure

may

be

higher

slightly).

f\fter

adjustment.the pressure adjusting

screw

must

be locked by

the

Jock

nut.

Fig. 3 Adjustment

of

lube oil pressure

v .

Adjustment

of

In.iection

Pump

The

injection

pUlnp

has

tested

and

calibrated

at

the

factory.If

it

is necessary

to

readjust,the

readjustment

must

be

perf(}nned in a injection

pump

test bench with a standard injector

and

injection pipes

of

standard length

according

to

the

instructions in

Operation

Manual

of

the

Injection PUlnp.

VI

.Adiustlnent

of

Decompression

Arm

Lash

Turn the

crankshaft

to

make

that

the

piston

of

1st

cylinder is

at

the conlpression T.D.C. position.Turn

the

decompression

arnl

to

decompression

position.Loosen the Jock nut.Turn the adjusting

screw

to

bring

just into

contact

with

the

lock arm

of

intake valve (i.e.no valve lash).Screw

the

adjusting scre,v

by

3/5--.-4/5

turns

again

(Inake

the

intake valve lifling

to

0.6---

O.8mm

).~rhen

tighten the lock

nut.After

this"according

to

Item 3

of"

f\diustlnent

of

Valve

Lash",

nlake

the

piston

of

another

cylinders

at

the

compression

TDe

position

one

by

one

and

adjust

by

the

same

method.

4-4

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