Datsun 1800 Throttle Valve Interlock Opening; Datsun 1800 Carburetor Removing/Dismantling/Assembly/Installation; Datsun 1800 Carburetor Technical Data - Datsun 510 series Workshop Manual

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 3 937 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 16
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 3 54 in
Primary
Secondary
Piston spring 100
gr
0 220 Ibs 31
mm
1 2 2 in
Bore 30mm 34mm
Power valve
spring
40 gr 0 0882 lbs
8 6mm
Large
venturi
23mm
28mm
0 34 in
52