1973 DATSUN B110 Service Repair Manual

CHASSIS

25T31T
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29T
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13T

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Fig
TM
l
RJW56

gear
train
Fig
TM
2
F4W56

gear
train

The
transmission
assembly
consists
of

transmission
case

which
contains

gear
assembly
and
rear
extension

The
cast
iron

adapter
plate
supports
each
end
of
the

main
shaft
counter
shaft

and
reverse
idler
shaft
and

front
side
of
the
transmission
case

supports
the
other
ends

Moreover
the
rear
extension

supports
the
main
shaft

rear
end

The

gear
assembly
can
be
disassembled
with
the

gear

assembly
installed
on
the

adapter
plate

j

I

a
JI
I
Ir

I
i

iiffq

J

1

f
Fi
1
1
1

J
F4h
56
transmission

REMOVAL

When

dismounting
the

transmission
from
the
vehicle

j
the
following
instructions

ER

Engine
Removal
apply
Refer
to
the
section

TM
2

TRANSMISSION

I

Jack
up
the
vehicle
and

support
it
with
four
stands

If
available
recommend
a

hydraulic
hoist
or

open
pit
be

utilized

2

Disconnect
the
front
exhaust
tube

D
from
the

exhaust
manifold

Fig
TM
4
Underside

of
vehiJ
1e

3
Remove
the

propeller
shaft

@
by
removing
four

securing
bolts
from
the

companion
flange
of
the

gear

carrier
Seal
the
end
of
the
rear
extension

housing
to

prevent
oil

leakage

Fig
TM
5

Removing
propeller
haft
4
Disconnect
the

speedometer
drive
cable

ID
and

back

up
lamp
switch
cable
from
the
transmission
ex

tension
housing

s
Disconnect
the
shift
rods
from
the

shift
levers

by

removing
the
cotter

pin
and
remove
the
cross
shaft

assembly
@
from
the
transmission
case

r

J
f

f

1

I
Speedometer
cable

I
2

I
Cotter

pin

Fig
TM

6

Disconnecting
speedometer
cable

and
remote

controllinkag

6

hydraulic
clutch
control

Remove
the
clutch

operating
cylinder
from
the

clutch

housing

7
mechanical
clutch
control

Disconect
the
clutch
control
cable
from
the
withdrawal

lever

1

1
Withdrawal
lever
2

I
Clutch
control
cable

Fig
TM
7

Disconnecting
clutch
control
cable

8

Support
the

engine
with

ajack
placed
under
the
oil

pan
Do
not
loca

1
f
nder
the
oil

pan
drain

plug

I

i
l

TM
3

CHASSIS

To

prevent
the
oil

pan
from

damaging
insert

a
wooden

block

between
the

pan
and

jack

9

Remove
two
nuts

@
used
to
attach
the

transmission

to

the

rear

engine

mounting
member

Place

a

jack
under

the

transmission
and

remove
two
bolts

@
used
to

fix
the

rear

engine
mounting
member
to

the

body

It

I
Rear

engine
mou

ting

installation

bolts

I
Rear

engine
mounting

bolts

I
2

Fig
TM
8
C

oss

Fberremoval

10

Raise
the

jack
supporting
the

engine
to
incline
the

engine
in
a
rearward

direction
A

sufficient

space
will
be

provided
for
transmission

removal

I
Remove

the

starting
motor
a
d
the

bolts

attaching

the
clutch

housing
to
the

engine

12

Lower
the

jack
under
tlie

and
withdraw
thS
transmission

iJ

DISASSEMBI
Y
trans
fljssion
gradu3Ily

1

j

I
When

disassembling
the
transmission

the

following

procedure

sh
ould
pe
adopted
Since
the

casings
are
made

of
aluminum

alloy
be

careful
not
to

damage
any
of
the

castings
C

t

l
t1
Drain

gear
o

frqrP
the
transmission

I

2
Rc

ove
the

dust

cover
release
the

withdrawal
lever

n
turn

sprin
and
remove
the

withdrawal
lever
and
release

bC
lring
from
the
clutch

housing

h

IF
i

Iii

h

l
11
I
W

ithdrawallever

I
Return

spring

1

31
Release

bearing

Fig
TM
9

Removing
release

bearing
and

withdrawal

lever

3

Remove
three
bolts

securing
the

front
cover
and

remove
the

front
cover

II
I
Front
coveT

L
I
Bolt

Fig
TM
10
Remd

ving

fron
cover

4
Remove

the

spced
omcter

pinion
assembly

1f

SPEEDOMETER

PINION

ASSEMB
Y

w

Fig
TM

11

Removing
speedometer

pinion

TM

4

eo

TRANSMISSION

5
Remove
the
return

spring
plug
and

remove
the

return

spring
plunger
and

bushing
from
the

inside

I

I
Plunger

2

Bush

I

I
Return

spring

Return

spring
plug

Fig
TM
12

Removing
return

spring

6
Remove
the

striking
rod

pin
from
the

striking
rod

rear
end
and

separate
the

striking
rod
from
the
control

lever
bracket

Fig
TM
i3
Re

ving
striki

g
rtfd

7
Remove

eight
bolts

lr
g
the
rear
extension

housing
and
remove
the
housing

Note
I

li9htly
tllp
the
ci
cumferen
with

a

mallet
and
withdraw
the
h

sin9
wooden

i

l

E
8

Separate
the

adapter
plate
from

the
transmission

case

Note
a
The
main
shaft

assembly
and
counter
shaft

assembly
are
installed
on
the

adapter
plate

b
When

removing
be
careful
not
to

lose
bearing

washer
installed
on
the
front
end
of
the
counter

shaft
r

i

i

1

il

ti

E

Fig
TAl
i4
Transmission

disasi
IY

9

Facing
the
reverse
idler

gear
upward
set
If
on
an

adapter
setting
plate
special
tool
ST23820000
and

secure
them
in
a
vise

C

j

J

f
f

L

jlor

f

0

1

J

t
1

PiS
TM
15

SettinR
trcw
wli
sion

geei
assembly
1

10
Remove
the

retaining
pin
by
the
use
of
a
fork
rod

pin
punch
special
1001
ST23520000
and
withdraw
Ihe

reverse

gear
shift
fork
and
reverse
idler

gear

TM
5

A
f

CHASSIS

I
1

I
ReV
erse

gear
shift
fork
2

I
Reverse
idler

gear

Fig
TM
16

Withdrawing
reverse
idler

gear
and

shift
fork

II
Remove
the

snap
ring
by
the
use
of
a

pair
of

snap

ring
pliers
and
remove
the

washer
and
reverse

gear

II
I
Sn

p
nng

Reverse
gear

I
3

I
W
he

Fig
TM
17

Removing
snap
ring

f

12
Remove

retaining
pin
from
each
shift
folK
bv
the

use
of
a

fork
rod

pin
punch
special
1001
5T2352oo00

Fig
TM
18

Removing
retaining
pin

I
TM
6
Remove
the

check
ball

plugs
I
for
all
fork
rods
and

remove
the
reverse

gear
l
wk
rod
hd
4th

gear
fork
rod

and
1st
2nd

gear
fork
rod
from
the

adapter
plate

Note
Be
carefu
not
to
lose
the
check
ball
and
check

spring

Fig
TM
19

Removing
check
ball

14

Lightly

tap
the

main
shaft
with

a
wooden
mallet

and

separate
the

main
shaft
assembly
and
counter
shaft

assembly
from
the

adapter
plate

Note
When

separating
the
main
shaft
assembly
and

countenhaft
assembly
be
careful
not
to

drop

them

They
may
be
broken

Fig
TM
20

RemovinR
gear
assembly

TRANSMISSION

15

Remove
the

needle

bearing
synchronizer
hub
thrust

washer

steel
ball
3rd
4th

synchronizer
mechanism

baulk

ring
3rd

gear
and
main

shaft
needle

bearing
toward

the
front
side
in

that
order

S
b

L

74FE

r

1
Needle

bearing

2
Thrust
washer

3
Steel
ball

4

Coupling
sleeve
5

BauIk

ring

6
3rd

gear

7
Needle

bearing

Fig
TM
21

Layout
of
main

shaft

16
Remove

the
main

bearing
from
the
main
shaft

by

the
use

of
a

bearing

puller
special
tool
ST2273
000
and

a

press

1

ST22730000

r
1

t

Jii

Fig
TM
22

Removing
main

drive

l7earing

17
Remove
the
thrust

washer
I
st

gear
needle

bearing

baulk

ring
1st
2nd

synchronizer
mechanism
baulk

ring
main
shaft
2nd

gear
needle

bearing
etc

from
the

main
shaft
1

2

3

4
5

Coupling
sleeve

6
Baulk

ring

7
2nd

gear

8
Needle

bearing
Thrust
washer

1st

gear

Needle

bearing

Baulk

ring

Fig
TM
23

Layout
of
main

shaft

18
Re

move
the

bearing
from
the
counter

gear

19
Remove
the

snap
ring
from
the
main

ge
f
and

remove
the
main
shaft

bearing

INSPECTI9N

Thoroughly
clean
all
disassembled

parts
with
solvent

and
check

them
for
wear

damage
and
other

defective

conditions

Transmission
case
and

rear
extension

Clean
them
with
solvent
thoroughly
and
check
for

crack

which

may
cause
oil

leaking
and
other
defective

conditions

I

When
burr

pitting
and
or
other

damage
exists
on

the

joint
repair
or

replace

2

Remove
adhesive
from
the

installing
surface
com

pletely

3

Repair
or

replace
the
dowel

pin
knock

pin
if

damaged
bent
or

warped

4

When
rear
extension

bushing
interior
is
worn

unevenly
replace

TM
7

Ii

01
r

I
t

CHASSIS

Bearing

Thoroughly
clean
the

bearing
dry
and
remove

dust

with

compressed
air

2

When
the
ball

bearing
inner
race

and
center
race
ball

sliding
surfaces
are
worn

unevenly
and
or

unsmooth
due

to
crack
or
out
of
round
of
ball
is
excessive

due
to
wear

or

rough
surface

replace
the

bearing
with
a

new
one

6

Fig
TM
24

Inspecting
baa

bearing

f

3

tplace
needle

bearing
if
worn
or

damaged

I

ePlace
rear
extension

bushing
if
worn
or
cracked

r
r

Gear
and
shaft

I

Check
the

gear
for
wear

damage
and
or
crack
and

replace
if

required

2
Check
the
shaft
for

bending
crack
wear

and
worn

spline
and

replace
if

required

1

i

STEP

WEAR

I

TWIST

Fig
TM
25

Checking
main

shaft
spline
for
twisting

0

I

l

lii
j

o
iIk
j
i

Measure
each

gear
backlash
and

make
sure
that

backlash
is
in

range
from
0

08
to
0
18

mm
0
0031
to

0

0071
in

When
backlash
exceeds

this

range
recommend

both

driving
and
driven

gears
be

replaced
as
a
set

Fig
TM

26

Measuring
gear
backlash

4
End

play
of
the
1st

2nd
3rd

gears
should
be
in

range
from
0
15
to
0

25
mm
0

0059
to
0

0098
in

When

end

play
is

deviated
from
this

range
replace
with

new

gears

Flg
TM
27

Measuring

gear
end

play

i

Synchro
hub

thrust
washer

1
When
bronze

oil

stay
is

worn

excessively
replace
the

synchro
hub
thrust

washer
with

a
new
one

2
When
both
surfaces

are

warped
or

damaged
replace

TM
8

TR

ANSMISSION

Baulk

ring

I

Check
the
baulk

rings
for
wear

pitting
chips
or

burrs

If

any
abnormal
conditions
are
detected

they
must

be

replaced
with
new
ones

2

Place
the
baulk

ring
in

position
on
the
cone
of
each

gear
Push
the

ring
to
the

gear
and
check
the

gap
between

the
end
face
of
the
bauIk

ring
and
the
front
face
of

the

clutch
teeth
This

gap
should
be
within
1
05
to

I
4

mm

0

0413
to
0
0551
in

If
it
is
less
than
0
5
mm
0

0197

in
a

worn
bauIk

ring
may
be
the

cause
and

a
new

ring

should
be
fitted

ii
V

ilillltII

l
A

1
05
to
1
4

mm

0
0413
to
0
0551
in

Fig
TM
28

ulk

ring
to

cone

installing
dimension

ShiftiAg
insert

Replace
if
worn

excessively
worn

unevenly
de

formed
or

damaged

Oil
seal
i

T

l
l

11

tT

Replace
the
oil
seal
with
a
new
one
if

lip
is
deformed

f

worn
or
cracked
or
when
the

spring
is

dropped
off

When
it
is

necessary
to

replace
the
transmission
rear

oil

seal
use
the

following

procedurecto
prevent
d

age
to
the

extension

l

1
Insert
the
transmission

rear
oil

seal
remover

ST23850000
into
the
dust
cover

2
Attach

a
pipe
wrench
to
the
dust

cover
and
drive
out

the
dust

cover

together
with
the

oil
seal

by

rotating
the

wrench
four
or
five
turns

I
Oil
seal

Extension
IJ

y

Fig
TM
29

Removing
rear
oil
seal

r

VI
1

3

Apply
a

coating
of

sealing
material

to
the

periphery

of
the
dust
cover
when

pressing
a
new
oil

seal
into

position
Never

apply
an
adhesive

caulking
material

Rear

engine
mounting
insulator

Replace
rear

engine
mounting
insulator

if

weakened

a

deteriorated
or

cracked

7i
1

rt

REASSEMBLY
AND
AD
JUSTMENT

Selecting
counter

bearing
thrust

washer

l
Fit
the
counter

bearings
to
the

counter
shaft
both

front
and

rear

by
the

use
of

a
counter
shaft

bearing
press

stand

special
tool

ST23030000
and

by
means
of

pressing

r

j

Itf

Fig
TM

JO

Fitting
counter

shaft

bearing
r

JJff
i

it

l
t

i

j

IlK

Ji
t

l
k

TM
9