Weifang 495 - Adjusting Rated Amount of Fuel Delivery;Fixing High Speed Stop Screw; Adjusting Control Fork Position on Control Rod

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(ii)

Rotate

the

pump

camshaft

clockwisely

(vie'wed

from

the

end

of

the

pump

flange)

and

watch

the

fuel

level

inside

th'e

glass

tube

until

it

starts

to

rise

;record

the

fuel

delivery

advancea,ngle

of

the

first

cylinder.

The

other

cylin'ders

should

be

checked

in

the

same

way

in

the

sequence

of

1

-3

--

4 - 2.

The

timing

interval

should

be

90°

each

and

the

tolerance

in

respect

to

the

first

eylinder

should

be.

less

than±

1

0.

·(iii

)The

adjusting'

tappet

pad·should

be,

:replaced)

ai1dthe~"ftiel

delivery

!timing

istervals

should

~

be

readjusted

if

th:e·

tolerance'

e:x-

ceeds

the

specified

limit.

b).

Adjusting

control

fork

position

on

control

rod'

'i

Adjust

the

staring

amount

of

fuel

delivery

6f

the

first

cylin'der

to

17+

lem

3

/200

strokes

when

the

camshaft

speed

is

at

100-15"0

rpm.

Then

fix

this

control

fork

and

set

the

remaining

control

forks

in

equal

distances

ai>art

in

general

by

means6f

a

vernier

calliper.

c.

Adjusting

rated

~mount

of

fuel

delivery

and

fixing

the

high

speed

stop

screw.

(i)

Adjusting

rated

amount

of

fuel

delivery;

Let

the

camshaft

running

at

a

speed

of

1000

rpm

and

set

the-

governor

control

lever

to

the

position

on

which

the

gov'ernor

spring

exerts

a

heavier

pre-

tension,

then

turn

the

correcting

scr'ew

to

obtain

the

'amount

of

fu-

el

delivery

of

the

first

cylinder'

being

22+

o.

3

cm

3

/400

-stroks.

Ad-

just

the

amount

of

fuel

delivery

of

the

remaining

cylinders'-'to

be

within

this

limit

(The

unevenness

of

them

sjlould

not

"exceeds

3%).

Finally,

tighten

the

screws

'of

the

ramaining

controlf6rks.

The

unevernness

of

the'

fuel

deli~\'Yerycanbe

calculated

ac

1

cord-

ing

to

the

following

equatioIl:

.

Qmax

-

Qrrlln

H = .

..

X

100

0

/

Qaverage

70

57

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