AUX DATSUN B110 1973 Service Repair Manual
[x] Cancel search | Manufacturer: DATSUN, Model Year: 1973, Model line: B110, Model: DATSUN B110 1973Pages: 513, PDF Size: 28.74 MB
Page 11 of 513
Control
valve
assembly
AUTOMATIC
TRANSMISSION
Oil
from
pump
ru
nn
i
I
I
I
Throttle
valve
I
I
1
m
nn
I
Auxiliary
valve
I
Regulator
valve
j
Manual
valve
I
Uoe
pressure
Speed
change
L
I
Governor
valve
I
I
valve
J
1
1
Clutch
and
brake
Flow
chart
of
control
valve
system
The
control
valve
assembly
receives
oil
from
the
pump
and
the
individual
signals
from
the
vacuum
diaphragm
and
transmits
the
individual
line
pres
sures
to
the
transmission
friction
ele
ment
torque
converter
circuit
and
lubricating
system
circuit
as
the
out
puts
To
be
more
specifically
the
oil
from
the
oil
pump
is
regulated
by
the
regulator
valve
and
line
pressures
build
up
The
line
pressures
are
fed
out
from
the
control
valve
assembly
as
they
are
through
various
direction
changeover
valves
including
ON
OFF
valve
and
regulator
valves
newly
reformed
to
a
throttle
system
oil
pressure
and
op
crates
other
valves
or
finally
the
line
pressure
are
transmitted
to
the
re
quired
clutch
or
brake
servo
piston
unit
in
response
to
the
individual
running
conditions
after
receiving
sig
nals
from
the
previously
described
vacuum
diaphragm
downshift
sole
noid
governor
valve
and
or
manual
linkage
The
control
valve
assembly
consists
of
the
following
valves
Pressure
regulator
valve
2
Manual
valve
3
1st
2nd
shift
valve
4
2nd
3rd
shift
valve
S
Pressure
modifier
valve
6
Yacuum
throttle
valve
7
Throttle
back
up
valve
8
Solenoid
downshift
valve
9
Second
lock
valve
0
2nd
3rd
timing
valve
Pressure
regulator
valve
PRV
The
pressure
regulator
valve
re
ceives
valve
spring
force
force
from
plug
created
by
the
throttle
pressure
16
and
line
pressure
7
and
force
of
the
throttle
pressure
18
With
the
mutual
operations
of
those
forces
the
PRY
regulates
the
line
pressure
7
to
the
most
suitable
pressures
at
the
individual
driving
conditions
The
oil
from
the
oil
pump
is
ap
plied
to
the
ring
shaped
area
through
orifice
20
As
the
result
the
PRY
is
depressed
downward
and
moves
from
port
7
up
to
such
extent
that
the
space
to
the
subsequent
drain
port
marked
with
x
in
Figure
AT
10
opens
slightly
Thus
the
line
pressure
7
is
balanced
with
the
spring
force
AT
7
and
the
PRY
is
thereby
balanced
In
this
the
space
from
the
port
7
to
the
subsequent
converter
oil
pressure
14
circuit
has
also
been
opened
As
the
result
the
converter
is
filled
with
the
pressurized
oil
in
the
circuit
14
and
the
oil
is
further
u
d
for
the
Iubrica
tion
of
the
rear
unit
Moreover
a
part
of
the
oil
is
branched
and
used
for
the
lubrication
of
front
unit
for
the
front
and
rear
clutches
When
the
accelerator
pedal
is
de
pressed
the
throttle
pressure
16
in
creases
as
described
in
the
preceding
paragraph
oil
pressure
is
applied
to
the
plug
through
orifice
21
and
the
pressure
is
added
to
the
spring
force
As
the
result
the
PRY
is
contrarily
depressed
upward
space
to
the
drain
port
is
reduced
and
the
line
pressure
7
increases
Afl
II
Jwi
06
A
J
L
I
7
I
tf
Iij
BL
i
il
J
jti
r
x
r
1
J
I
l
I
X
6
C
l
o
ii
J
f
A
T09S
Fig
AT
10
Pressure
regulator
value
tr
r
Page 17 of 513
AUTOMATIC
TRANSMISSION
HYDRAULIC
SYSTEM
AND
MECHANICAL
OPERATION
The
operating
system
of
oil
pres
sure
in
each
range
is
described
below
The
oil
pressure
in
each
circuit
shown
in
the
illustration
is
classified
as
follows
according
to
the
function
The
numerals
show
the
circuit
num
bers
Pressure
source
of
the
line
7
Operating
line
pressure
for
friction
elements
I
2
3
4
5
6
8
9
10
II
12
Auxiliary
line
pressure
13
Pressure
of
throttle
system
16
17
18
19
Others
14
15
t
AT106
Fig
AT
22
ld
Jltification
of
oil
channels
in
case
front
fac
e
Discharge
hole
of
oil
pump
7
Torque
c
nver
pre
ure
14
co
t
Re
r
lutch
pressure
l
Front
clutch
pres5ure
II
I
c
Suction
hole
of
t
o
ump
lUlJJl
0
o
f
Governor
Dl5charge
hol
of
011
pUf
lP
7
pressure
15
I
II
nl
1F
Jl
r
Torque
converter
o
L
U
pres
ure
14
It
0
Servo
release
i
I
prc
sUre
IO
Rear
clutch
Servo
L
i
pres
ure
I
0
6
tightening
19
iressu
9
01
Front
clutch
rJj
low
reverse
pressure
II
0
C
lrv
brake
pressure
Suction
hole
of
oil
pump
s
6od
OJ
12
Governor
feed
pressure
I
ATlOS
AT101
Fig
AT
21
Identification
of
oil
channels
in
oil
pu
mp
Fig
AT
23
Identification
of
oil
channels
in
case
face
AT
13
Page 400 of 513
FUEl
SYSTEM
Secondary
throttle
valve
is
operated
by
throttle
lever
The
high
power
and
good
acceleration
are
gained
with
combination
of
the
auxiliary
valve
2
Accelerating
pump
gives
excellent
acceleration
3
The
power
valve
mechanism
is
of
a
vacuum
actuated
boost
type
and
improves
high
speed
driving
4
The
throttle
opener
control
system
Refer
to
Section
ET
incorporates
a
servo
diaphragm
The
servo
dia
phragm
helps
open
the
throttle
valve
at
a
decreasing
speed
so
as
to
reduce
the
emission
of
hydrocarbons
to
a
minimum
5
An
anti
dieseling
solenoid
is
used
as
a
means
of
preventing
dieseling
When
the
ignition
key
is
turned
off
the
fuel
passage
involved
in
the
slow
system
is
closed
and
the
fuel
supply
is
shut
down
completely
6
In
the
choke
mechanism
an
electric
automatic
choke
is
used
to
automatically
control
the
choke
valve
operation
during
the
warm
up
of
the
engine
7
The
carburetor
for
automatic
transmission
is
equipped
with
so
called
dash
pot
that
is
it
makes
smooth
decelerating
without
engine
stall
at
any
operating
condi
tion
These
carburetors
are
quite
similar
in
appearance
as
explained
above
except
the
dash
pot
for
the
au
tomatic
transmission
model
The
differences
in
performance
are
explained
in
the
following
as
necessary
for
Manual
transmission
for
4utomatic
transmission
Fig
EF
14
External
view
of
carburetor
STRUCTURE
AND
OPERATION
These
carburetors
consist
of
the
primary
system
for
normal
running
and
secondary
system
for
full
load
running
The
float
system
which
is
commonly
used
by
the
primary
and
secondary
systems
the
secondary
switch
over
mechanism
accelerating
mechanism
etc
are
also
at
tached
The
anti
dieseling
solenoid
valve
and
the
power
valve
mechanism
are
used
The
carburetor
is
of
down
draft
two
barrel
type
EF
9
Page 401 of 513
ENGINE
6
f
I
Filter
to
Primary
main
nozzk
18
Secondary
throttle
valve
2
Needle
valve
11
Primary
main
air
bleed
19
Primal
throttle
valve
3
Secondary
slow
jet
12
Primary
slow
air
bleed
20
Idle
nozzle
4
Secondary
slow
air
bleed
13
Primary
slow
jet
2t
By
pass
hole
5
Secondary
main
air
bleed
14
Float
22
Primary
main
jet
6
Secondary
main
nozzle
15
Secondary
emulsion
tube
23
Primary
emulsion
tube
7
Secondary
air
vent
pipe
t6
Secondary
main
jet
24
Power
valve
8
Choke
valve
t7
Auxiliary
alve
25
Level
gauge
9
Primary
air
nt
pipe
Fig
EF
15
Sectional
view
of
model
DCH306
carburetor
bleed
The
gas
mixture
is
injected
into
the
venturi
through
the
main
nozzle
When
the
throttle
valve
is
wide
open
and
the
engine
requires
dense
mixture
gas
the
power
valve
opens
from
where
the
fuel
also
flows
into
the
main
system
Primary
system
Primary
main
system
The
fuel
flowing
out
of
the
passages
at
the
bottom
of
the
float
chamber
passes
through
the
primary
main
jet
and
is
mixed
with
the
air
coming
from
the
main
air
Secondary
side
Primary
side
1
Primary
main
nozzle
2
Primary
main
air
bleed
3
Primary
slow
air
bleed
4
Primary
slow
jet
5
Secondary
throttle
valve
6
Primary
throttle
valve
7
Idle
nozzle
8
By
pass
hole
9
Primary
main
jet
Fig
EF
16
PaTtially
loading
EF
10
Page 402 of 513
FUEl
SYSTEM
Idling
and
slow
system
Passing
through
the
main
jet
the
fuel
passage
is
separated
from
main
line
fuel
flows
through
the
slow
jet
primary
slow
air
bleed
is
ejected
from
the
by
pass
hole
and
idle
nozzle
Accelerating
mechanism
Cj
f
li
Ip
j
1
2
3
4
5
Inlet
valve
6
Outlet
valve
7
Primary
throttle
valve
8
Pump
connecting
rod
Pump
lever
Pump
nozzle
Piston
Piston
return
spring
Fig
EF
17
Accelerating
mechanism
A
mechanical
accelerating
pump
synchronized
with
the
throttle
valve
is
used
When
the
throttle
valve
is
closed
the
piston
rod
is
pushed
up
with
the
linkage
which
pushes
up
the
piston
through
the
piston
return
spring
When
the
piston
comes
down
the
inlet
valve
closes
the
outlet
valve
opens
and
the
fuel
within
the
pump
is
blown
out
from
the
pump
jet
by
the
compressed
piston
return
spring
The
fuel
hits
against
the
side
wall
of
the
small
venturi
becoming
minute
drops
and
compen
sating
trancient
sparseness
of
the
fuel
Power
valve
mechanism
The
power
valve
mechanism
so
called
vacuum
actuated
boost
type
makes
use
of
the
downward
pulling
force
of
the
air
stream
below
the
throttle
valve
When
the
throttle
valve
is
slightly
opened
during
light
load
running
a
high
vacuum
is
created
This
vacuum
pulls
the
vacuum
piston
upward
against
the
spring
leaving
the
power
valve
closed
When
the
vacuum
is
lowered
during
full
load
or
accelerating
running
the
spring
pushes
the
vacuum
piston
downward
opening
the
power
valve
to
furnish
fuel
EF
11
Secondary
system
Secondary
main
system
When
the
primary
throttle
valve
is
wide
open
and
the
engine
produces
high
power
the
secondary
throttle
valve
begins
to
open
by
the
linkage
However
the
auxiliary
Y
J
lve
does
not
open
at
a
slow
speed
due
to
the
counterweight
connected
to
the
valve
shaft
As
the
engine
picks
up
speeds
the
auxiliary
valve
opens
against
the
load
of
the
counterweight
and
the
second
ary
system
starts
operation
for
high
power
operation
The
fuel
flowing
out
of
the
passage
at
the
bottom
of
the
float
chamber
passes
through
the
secondary
main
jet
The
fuel
is
mixed
with
the
air
coming
from
the
main
air
bleed
and
the
mixture
is
blown
into
the
venturi
through
the
main
nozzle
When
the
primary
throttle
valve
is
in
the
full
open
position
the
secondary
throttle
valve
is
also
fully
opened
t
2
3
4
5
Auxiliary
valve
6
Secondary
throttle
valve
7
Primary
throttle
valve
8
Primary
main
jet
Counter
lever
Primary
main
nozzle
Primary
main
air
bleed
Counterweight
Fig
EF
1B
At
full
open
slow
speed
j
1
2
3
4
5
6
Counter
weight
7
Secondary
main
air
bleed
8
Secondary
main
nozzle
9
Counter
lever
10
Primary
main
nozzle
11
Primary
main
air
bleed
Secondary
main
jet
Auxiliary
valve
Secondary
throttle
valve
Primary
throttle
valve
Primary
main
jet
Fig
EF
19
At
full
open
high
speed
Page 403 of 513
ENGINE
Step
system
The
construction
of
this
system
corresponds
to
the
idling
and
slow
system
of
the
primary
system
This
system
aims
at
the
power
filling
up
of
the
gap
when
fuel
supply
is
transferred
from
the
primary
system
to
the
secondary
system
The
step
port
is
located
near
the
auxiliary
valve
in
its
fully
closed
state
Anti
uesetmg
solenoid
Ignition
switch
OFF
ON
I
L
i1
7
I
Anti
dieseling
solenoid
valve
When
the
ignition
key
is
turn
to
OFF
current
will
not
flow
through
the
solenoid
and
the
slow
system
fuel
passage
is
closed
to
shut
down
the
engine
without
dieseling
If
anti
dieseling
solenoid
is
found
defective
replace
the
solenoid
as
an
assembled
llnit
Fuse
Ignition
switch
T
Baitery
717
Fig
EF
20
Schematic
drawing
of
anti
dieseling
solenoid
Removal
and
installation
of
anti
dieseling
solenoid
Removal
Solenoid
is
cemented
at
factory
Use
special
tool
STl9
I
50000
to
remove
a
solenoid
When
this
tool
is
not
effective
use
a
pair
of
pliers
to
loosen
body
out
of
position
Installation
I
Before
installing
a
solenoid
it
is
essential
to
clean
all
threaded
parts
of
carburetor
and
solenoid
Supply
screws
in
holes
and
turn
them
in
two
or
three
pitches
2
First
without
disturbing
the
above
setting
coat
all
exposed
threads
with
adhensive
the
Stud
Lock
of
LOCTlTE
or
equivalent
Then
torque
screws
to
35
to
55
kg
cm
30
to
48
in
lb
using
a
special
tool
STl9150000
After
installing
anti
dieseling
solenoid
leave
the
carburetor
move
than
12
hours
without
operation
3
Mter
replacement
is
over
start
engine
and
check
to
be
sure
that
fuel
is
not
leaking
and
that
anti
dieseling
solenoid
is
in
good
condition
Notes
a
Do
not
allow
adhesive
getting
on
valve
Failure
to
follow
this
caution
would
result
in
improper
valve
performance
or
clogged
fuel
passage
b
In
installing
valve
use
caution
not
to
hold
body
directly
Instead
use
special
tool
tight
ening
nuts
as
required
Float
system
Fuel
fed
from
the
fuel
pump
flows
through
the
filter
and
needle
valve
into
the
float
chamber
A
constant
fuel
level
is
maintained
by
the
float
and
needle
valve
As
ventilation
within
the
float
chamber
is
of
an
air
vent
method
Electric
automatic
choke
An
electric
heater
warms
a
bimetal
interconnected
to
the
choke
valve
and
controls
the
position
of
choke
valve
and
throttle
valve
in
accordance
with
the
elapse
of
time
or
the
warm
up
condition
of
engine
The
construction
and
function
of
each
part
of
this
automatic
choke
are
as
follows
See
Figure
EF
21
EF
12