1969 DATSUN 610 gas type

between

primary
throttle
valve

and
the
wall
of
the
throttle

chamber
can

be

adjusted
if

necessary
by
carefully

bending
the

choke

connecting
rod
3

THROTILE

VALVE
INTERLOCK
OPENING

With

the

primary
throttle
valve
of
the

type
DAK340

carburettor

opened
to
600
as
shown

in
Fig
B
9
the

adjusting

plate
3
should
contact

the

connecting
lever

J
This

being

the

point
before
the

secondary
throttle
valve
is

brough
into

operation
The

linkage
between

primary
and

secondary
throttles

is

working
correctly
if
the
clearance

G
between

primary
throttle

valve
and
the
wall
of
the
chamber
is
738
mm
0
3937
in

Adjust
if

necessary
by
carefully

bending
the
adjusting

plate
at

point
A
until
the
correct

setting
is
obtained

With
the

primary
throttle
valve
of
the

type
D3034C
car

burettor

opened
at
an

angle
of
500
the

connecting
link
3
in

Fig
B
IO
should
ge
at
the
extreme
left
of
the
slot
in
the
throttle

ann
4
With
the

linkage

positioned
as

shown
measure

the

clearance
between

primary
throttle
valve
and
the
wall
of
the

chamber
as
described
for
the
DAK340

carburettor

Adjustment

can

be
made
if

necessary
by
bending
the

connecting
link
until

the
correct
clearance
is
obtained

CARBURElTOR

Removing
and

Dismantling

The
carburettor
can
be
removed

by
following
the

instruc

tions

previously
given
for
carburettor
removal
on
the
Ll4
L16

and
LIB

engines

Dismantle
the
type
DAK340
carburettor
as
follows

Remove
the

primary
throttle
return

spring
Take
off
the

E

ring
and
remove

the
pump
and

connecting
rod
Remove
the

split
pin
and
choke

connecting
rod
Remove
the

secondary

throttle
return

spring
Remove
the
choke
wire
arm
choke
valve

shaft
and
valve

spring
Take
off
the

clip
and
remove

the
choke

lever
and

spring
To
dismantle
the
float
chamber
take
off
the

diaphragm
cover
and
remove
the

spring
and

diaphragm
Remove
the

diaphragm
chamber
and

gasket
Take
off

the
float
chamber

cover
and
remove
the

gasket
level

gauge
rubber
seal
and
float

Remove
the
screw
from
the
filter
and
withdraw
the

nipple

and
filter
Remove
the

needle
valve
Take
off
the

cylinder

cover

and

pump
cover

and
withdraw
the

piston
piston
return

spring
and
inlet
valve
Remove
the

primary
main
air
bleed
the

secondary
main
air
bleed
and
emulsion
tube
Take

off
the

small
venturi
and
remove
the

primary
and

secondary
slow

jets

and
slow
air
bleeds
Remove
the
drain

plugs
and
take
out
the

primary
and

secondary
main

jets

To
dismantle
the
throttle
chamber
remove
the
throttle

adjusting
screw
and

spring
and
the
idling
adjusting
screw
and

spring
Withdraw
the
throttle
lever

spring
hanger
sleeve

connecting
lever
return

plate
and

adjusting
plate
Withdraw

the

primary
throttle
valve
and

primary
throttle
shaft
Withdraw

the

secondary
throttle
valve
and

secondary
throttle
shaft

The

type
D3034C
carburettor
can
be
dismantled
as
follows

Detach
the

starting
connecting
rod
from
the
choke

lever
and

accelerator

pump
connecting
rod

Remove
the
air
horn

pump
rod
slow

jets
the

primary
and

secondary
small
venturies
Detach
the

primary
and

secondary

linkages
Take
off
the

diaphragm
chambe
cover
and
take
out

the

spring
and

diaphragm
Remove
the

diaphragm
chamber
and

gasket
Separate
the
float
chamber
from
the
throttle
chamber

take
off

the
float
chamber
cover
and
remove
the

components

Remove
the
inlet
strainer
and
float
valve
seat
Remove
the
main

jets
and

take
off
the
fuel

cut
off

valve

CARBURETTOR

Assembly
and
Installation

The

assembly
and
installation
of
the
carburettor
is
a

reversal
of
the

dismantling
and
removal

procedures

Clean
and

inspect
all

components
as
described
for
the

carburettors
fitted
to
the
Ll4
Ll6
and
LI8

engines

TechnIcal
Data

CARBURETIOR
Small
ven
turi

First
7mm

8mm

Carburettor

Type
DAK340
Second
14mm
16mm

Main

jet
02
155

Primary
Secondary
Slow

jet
50
80

Main
air
bleed
60
80

Outlet
diameter
30mm
34mm
Emulsion
hole
0
5
mm
O
5mm

Venturi

diameter
23
mm

29
x
9
mm

Slow
air
bleed

Main

jet
119
165
First
160

Main
air
bleed
220
100

Second
150
220

Slow

jet
48
90

Slow
economizer
1
6
mm

dia

Slow
air
bleed
130
100

Power

jet
50

Slow
economizer
L4mm

Cushion

jet
120

Economizer
bleed
1
2mm

Air

jet
150

Carburettor

Type
D3034C
Power

system
Vacllum

acting

Vacuum

piston
diameter
9
0
mm
0
354
in

Primary

Secondary
Piston

spring
100

gr
0
220
Ibs
31
mm

1
22
in

Bore
30mm
34mm
Power
valve

spring
40

gr
0
0882
lbs
8
6mm

Large
venturi
23mm

28mm
0
34
in

52