1973 DATSUN B110 check oil

CLUTCH

Clogged
vent
hole
in
reservoir

cap
promotes

vacuum

in
master

cylinder

allowing
air

to

inf1ltrate

past
the
seal

Abnormal

lining
wear

Insufficient

pedal
free
travel

The
clutch

grabs

The
clutch

slips
Driver

steps
unnecessarily
on

pedal
this

causes
lin

jog
wear

and

damage
to
release

bearing

Weakened

or

snapped
pressure
springs

Incorrectly
installed

linings

Oil
or

grease
on

flywheel
pressure
plate
and

linings

Loose

disc

linings
due

to

poor
rivet

tightness

Clutch
disc

hub
does
not

slide

freely
on

drive
shaft

spline

Warped
or
cracked

pressure
plate

Misalignment

Stiffened

hydraulic
control
mechanism

Wom
out

lining

Insufficient
clutch

pedal
return

travel
due

to
the
control
and

pedal
return

springs
being

weak
or

misadjusted

Weakened
or
broken

diaphragm
spring

Oil
or

grease
on

linings

eLl5
Clean
reservoir

cap
unclog
the
vent

hole
and

bleed

the

system

Adjust
clutch

pedal
free
travel

correctly

Advise
driver

to
discontinue

wrong

practice

and

step
on

clutch

pedal
only
when
ne

cessary

Check

pressure
springs
for
tension
as

speci

fied
and

replace
springs
if

they
are

unserviceable

Replace

linings
with
new
ones

and
install

them

correctly
Check
clutch
disc
for
center

alignment

Remove
cause

of

leakage
clean

flywheel
and

pressure

plate
thoroughly
replace
linings

If

linings
are
not
worn

replace
defective

rivets

Otherwise

replace
linings
and
clench

rivets

securely

Remove

any

foreign
matter
or

dirt

deposits

from
shaft

splines
When
trouble
is

still

present
replace
damaged
parts

Replace
pressure

plate

Locate
the
defective

point
and
if

possible

adjust
alignment
or

replace
distorted

parts

Check

spring
tension

If

necessary
take

down

pedal
and

lubricate

components

Install
new

linings
and

make
sure
tha

t
the

clutch

disc

pressure
plate
and

flywheel
are

not

damaged

Locate

cause
of
failure
and

replace
defective

springs

Overhaul
clutch
and

replace
springs

Remove
cause
of

leakage
and

replace
linings

if

cleaning
is

ineffective

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