lock DATSUN PICK-UP 1977 Service Manual

Adjustment
of
front
end

play

Sele
t
front
dutch
thrust
washer

by

calculating
the

following
formula

T

F
C
D

0
2
mm

where

T

F
Required
thickness
of
front

clutch
thrust
washer
mm
in

C
Measured
distance
C
mm
in

D
Measured
distance
D
mm
in

Available
front
clutch
thrust

washer

Thickness
mm
in

1
5
0
059

I
7
0
067

1
9
0
075

2
1
0
083

2
3
0
091

2
5
0
098

27
0
106

Specified
front
end

play

0
5
to
0

8
mm

0
020
to
0

031
in

Notes

a
Correct
thickness
of

bearing
race

and
thrust
washer
is
always
the
one

which
is
nearest
the
calculated
one

b
Installed
thickness
of
oil

pump
gas

ket
is
0
4

mm
0
016
in

10
Check
to
be
sure
that
brake

servo

piston
moves
freely
For
detailed

ptocedure
refer
to

page
AT
42
for

Servo
Piston
Use
care
to

prevent

piston
from

coming
out
of

place
dUI

ing
testing
since
servo
retainer
is
not

tightened
at
this

point
of

assembly

II
Make
sure
that
brake
band
strut

is

correctly
installcd

Torque
piston

stem
to
1
2
to
1
5

kg
m
9
to
11

f1
lb
Back
off
two
full
lurns
and

secure
with
lock
nut
Lock
nut

tight

ening
torque
is
1
5
to
4

0

kg
m

II
to

9

f1
lb
Automatic
Transmission

12
After
inhibitor
switch
is
in

stalled
check
to
be
sure
that
it

op

erates

properly
in

each
range
For

detailed

procedure
refer
to

page
AT

49
for
Checl
ing
and

Adjusting
Inhibi

tor
Switch

13
Check
the

length
L
between

case
end
to
rod
end
ofvacuum
throllle

valve
fully

pushed
in
Then
select

adequate
diaphragm
rod
of
corre

sponding
measured
length
See
Figure

AT
77

Available

diaphragm
rod

Distanl
e

measured
L
ITIm
in

Under25
55

l
OO59

25
65

to
26
05
1

0098
to
1
0256

26
15
to
26
55
1

0295
to
1

0453

26

65
to
27
05
1
0492
to
1

0650

Over
27
15
1
0689

COMPONENT
PARTS

The
transmission
cons
sts
of

many

small

parts
that
are

quite
alike
in

construction
yet
machined
to

very

close
tolerances
When
disassembling

parts
be
sure
to

place
them
in

order
in

part
rack
so

they
can

be
restored
in

the

unit
in
their

proper
positions
It
is

also

very
important
to

perform
func

tianal
test
whenever
it
is

designated

FRONT
CLUTCH

Disassembly

Front

clutch
drum

I

Pinon

lcz

t

AT146

1

Snap
ring

2

Retaining
plate

3
Drive

plate

4

Driven

plate

Fit
AT
78
S
Dished

plate

6

Snap

ring

7

Spring
retainer

8
Coil

spring

Sectional
view

of

front
clu
tch

AT
40
i

i
n
H

I
I

ni
c
A
i

iif

L

1

AT145

Fig
AT
77

Measuring
the
distance

L

Diaphragm
rod

length
mm
in

29
00
142
u

29

5
1161

30
0
1
81

30
5
1201

31
0
I
O

I

Pry
off

snap
ring
D
with

a

suitable
screwdriver
or

a

pair
of

pliers

Remove
a

retaining
plate
@
drive

plate
CID
driven

plate
@
and
dished

plate
@
in

the
order
listed
as
shown

in

Figure
AT
78

I

2

Compress
clutch

springs
using

Clutch

Spring
Compressor

ST25420001
or

51
25420000
Re

move

snap
ring
@
from

spring
re

tainer

using
Snap
Ring
Remover

ST2532000
I

See

Figure
AT
79

AT147

Fig
AT
79

Removing
snap
ring

Note
When
Clutch

Spring
Compres

sor
ST25420000
is
to
be
used
cut

the

toe

tips
of
three

legs
by
a

grinding
wheel
See

Figure
AT
80

I

F
1

D

t
l

a

J
n
f

19l1
Ull

IU
P

C
o
J

CJ
IODrR

CC

t

LL6
SJQIl2J

lhl

fB

rt

AT169

Fig
AT
102

Removing
separate

pllJte

3
Pull

out
manual
valve

as
shown
in

Figure
Ar103

4

Remove
side

plate
Take

out

1st
2nd
shift
valve
2nd

3rd
shift

valve

pressure
modifier

valve
and

three

valve

springs
See

Figure
AT

104
Automatic
Transmission

Fig
AT
103

Removing
manual
val

AT1
1

HT61000800

Fig
AT
104

Removing
side

plate

g

p

e

eguJa

Of
le6Ve
or

r
essure
reguJl

oL

@iO
I
f

g

SecOni
J

lOCltvalYi
y

h

l
l

2I
r

JI
Io
J
l

j

t

1

i

S

r
0

x

t

i

3
1
Note
Do
not
w
it

off
with
screw

drivers
To

avoid

darnagingmachine

screws
do

not
work
it
ff
with

screwdriver

5

Remove
side

plate

pull
out

pres

sure

regulator
valve
second
lock

valve

pressure

regi1lator
plug
and
two

valve

springs

6

Remove
side

plate
With

side

plate
removed
solenoid
downshift

valve
throttle
back

up
valve

vacuum

throttle
valve
2

d
3rd
t

ing
valve

and
three
valve

springs
are
free
for

removal

2nd
3rd

timing
talve

r

en

i
C1iJrilth

rottle
lI

lY
e

M
a

alVSY
I

j1

f

I
1

f
Iv

I

f
2i
3

CP

g

f
st

2nd
S
t
a

el

2i1d

3
d
St1itLvalv

so

iit
a

stiift

V81v
i

hrottle

f

iicnjp
VB
y
i

P

ie
mo

i

Inspection

r

I

Check
valves
for

sign
of

burning

and
if

necessary
replace

2
Check
to

be
certain
that

oil

strainer
is
in

good
condition

If
found

damaged
in

any
manner
disCard

3

Test
valve

springs
for

weakened
Fig
AT

105

Components
ports
of
control
uolue

tension

if

necessary
replace

4

Examine

for

any

sign

oLdamage

or

score
marks
on

separate

plate
If

left
unheedcd

oiL
will

bypass
correct

oil

passages
causing
many
types
of

abnormalities

in

thesystem

AT45
5
Check
oil

passages
in

valve
b

dy

for

sign
of

damage
and
other
condi

tions
which

might
interfere
with

prop

er
valve

operation

6
Check
bolts
for

stripped
threads

Replace
as

required

Automatic
Transmission

Valve

spring
chart

Mean
coil
Installed

Valve

spring
Wiredia

dia
No
of

free

length

mm
in

mm

in
active
coil

mm
in

Length
Load

mm
in

kg
lb

Manual

detent
1
3
6
0
15

0

32
4

26
5

5
5

0
051

0
236
1
276
1
043

12
1

Pressure

regulator
1
2
10
5
13

0
43

0
23
5
2

8

0
047
0
413

1

693
0
925
6

2

Pressure
modifier
0
4

8
0

5
0

18
5

9
0
0
1

0

016
0
315

0
728

0
354
0
2

1st
2nd
shift
0
6
6
0

6
0
32
0
16

0
0
625

0

024
0

236
1
260
0

630
1
378

2nd

3rd
shifl
0
7
6

2
8
0
41

0
17
0

1
40

0
028
0
244

1

614

0
669
3

09

2nd
3rd

timing
0
7
5
5
15

0

32
5
27
0
0
55

0
028

0
217

1
280
1
063
1
21

Throule
back

lIP
0
8

6
5

14

0
36
0
18
8
1

92

0
031

0
256

1417
0
740
4
23

Solenoid
downshift
0
55

5
0
12

0
22
0

12
5
0

60

0
0217
0

197

0
866
0
492

1
32

Second
lock
0
55

5
0
16
0

33
5
21
0
0
60

0

0217
0

197

1
319
0
827

1
32

Throule

relief
0

9
5

6
14
0

26
8
19
0

2
9

0
035
0

220

1
055
0
748
4
83

Orifice
check
0
23
4

77
12
0

J5
5
11
5

0
01

0
0091
0
1878

0
610
0
453

0
02

Primary
governor
0
45
8
3
5
0

21
8
7
5
0

215

0
0177
0
327

0
858
0
295
0
474

Secondary

governor
0
7
8
5

5
5
25
1
10
5

I
10

0

028
0
335
0
988
0
413

2
43

Free

lenglhm
A
installed

f

n
ri

DO
n
i

Wire
dia

AT172
Assembly

Assemble
in

reverse
order
of
disas

sembly
However

observe
the
follow

ing
assembly
noles
Refer
to

Valve

Spring
Chart

and
illustralion
in

as

sembling
valve

springs

Dip
all

parts
in

clean
automatic

transmission
fluid

before

assembly

Tighten
parts
to

spec
ifications
when

designated

I
Slide

valve
into
valve

body
arid

be

particularly
careful
that

they
are
not

forced
in

any
way

2

Install
side

plates
using
Torque

Driver

ST25160000
and

Hexagon

Wrench
HT6
I

000800
See

Figure

AT
l
07
Fig
AT
106

Value

spring

AT
46

Automatic
Transmission

Order
Test
item

4
Shift
down

Dr
O2
0

5

Shift
down

DJ
12
1

6
Shift
down

DJ
2

7
Shift

up

I

12

8
Shift

up
or
down
when

start

iog
in

2

range

9

Parking

Others
Abnormal
shock
oil

leakage
Procedure

Check
vehicle

speeds
and

engine
rpm
in

shifting
down
from

3rd
2nd
I

st

sequentially
while

coasting
with

accelerater

pedal
released
in

D3
range
and

engine
vacuum

pressure
of
about
450

mmHg

Check
for

shifting
down

OJ
12
and

engine
braking
and

further
for

shifting
down

12
I
and

engine
braking
after

shifting
the
lever
into

I

range
with
the
accelerator

pedal

released
and
the

engine
vacuum

pressure
of
0

mmHg
while

driving
at
about
50
km
h

30
MPH
in

OJ
range

Check
for

quick
shifting
down

0
2
and

engine
biaking

after

shifting
the

lever
into
2

range
while

driving
at
about

50
km
h
30
MPH
in

OJ
range

Further
check
for

locking
of
the

transmission
in

2nd

gear

ratio

regardless
of
vehicle

speed

Check
for
failure
of
the
transmission
to
shift

up
during

acceleration
when

starting
in
I

range

Check
the
transmission

for
not

shifting
up
or
down

during

acceleration
or
deceleration
when

starting
in

2

rang

Confirm
that
vehicle
will
not
move
on

grade
when

shifting

to

P

range

Enter
into
record
conditions
observed

during
these
tests

such
as

gear
noise

abnormal
clutch
noise
and

acceleration

performance

AT
58

Automatic
Transmission

SERVICE
DATA
AND
SPECIFICATIONS

General

specifications
AfT

Torque
converter

Type

Stall

torque
ratio
Symmetrica13
element
I

stage

2

phase
torque
converter

2
0
I

Transmission

Type

Control
elements

Multiple
disc
clutch

Band
brake

Multiple
disc
brake

One

way
clutch

Gear
ratio

1st

2nd

3rd

Reverse
3

speed
forward
and

one
speed

reverse
with

planetary
gear
train

2

I

I

I

2

458

1458

1

000

2
182

Selector

positions
P
Park

R

Reverse

N
Neutral
Transmission
is

placed
in

neutral

Output
shaft
is

fIXed

Engine
can
be
started

Backward

running

Transmission
is
in

neutral

Engine
can
be

started

Up
or
downshifts

automatically
to

and
from
I

st
2nd
and

top

Fixed
at
2nd

Fixed
at
low

or
downshifts
from

2nd
o
Drive

2
2nd
lock

I
Lock

up

Oil

pump

Type
Internally
intermeshing
involute

gear
pump

Number
of

pump

Oil
Automatic
transmission
fluid

DEXRON

type

5
5

liters

SUU
s

qt
4Ulmp
qt

Approximately
2
7
liters

2UU
s

qt
2XIrnp

qt

in

torque
converter

Controlled

by
measuring
the

nega

tive

pressure
of
intake
manifold

and
the
revolution
of

output
shaft

Forced
lubrication

by
an
oil

pump

Water
cooled

by
a
circulation

type

auxiliary
cooler

located
at
the

radiator
Capacity

Hydraulic
control

system

Lubrication

system

Cooling
system

AT
59

Automatic

Transmission

Engine

Idling
and

stall

revolution

Idling
revolution

Stall

revolution
rpm

rpm
6S0
ai
0

position

2

000
to

2

200

TIghtening
torque

kg
m
ft
lb

Drive

plate
to

crankshaft

Drive

plate
to

torque
converter

Converter

housing
to

engine

Transmission
case
to

converter

housing

Transmission
case
to

rear
extension

Oil

pan
to
transmission

case

Servo

piston
retaine
T

to

transmission
case

Pislon
slem
when

adjuting
band
brake

Piston

stem
lock
nut

One

way
clutch
inner

race

to
transmission

case

Control
valve

body
to

transmission
case

Lower
valve

body
to

upper
valve

body

Side

plat
to

control
valve

body

Nut
for
control
valve

reamer
bolt

Oil
strainer

to
lower

valve

body

Governor

valve

body
to

oil
distribu
tor

Oil

pump
housing
to

oil

pump
cover

Inhibitor
switch
to
transmission

case

Manual
shaft
lock
nut

Oil
cooler

pipe
to
transmission
case

Test

plug
oil

pressure
inspection
hole

Support
actuator

parking
rod

inserting
position
to

rear
extension

I

Oil

charging
pipe
to
case

Dust

cover

to
converter

housing

Selector

range
lever
to
manual
shaft
14

0
to

16
0
101
to

116

4
0
to
5
0

29
to

36

4
0

to
S
O

29
10

36

4
S
to
5
5

33
to

40

2
0
to

S

14
to
18

O
S
to

0
7

4

to
S

O

S
to

0
7
4
to
S

1
2
to
1
5

9
to
11

1
5
to
4
0

I
I

to
29

1
3
to
1

8
9

to
13

0

5S
to
0
75
4
to
S

0
25

to
O
3S

2
to
3

0

25
to

0
35
2
to
3

O

S
to

0
7
4
to
S

0

25
to
0
35

2
to
3

D
S

100
7
4
to
5

0

6
to
0

8
4
to
6

0
5
to

0
7
4
toS

3
0

to
4

0
22

to
29

3
0
to

S
O

22
to

36

I
4to
2
1

10
to
IS

0
8
to
I
1
6
to
8

O
5S
to
0
7S

4
to
S

O
5S
to

0
75
4
to
S

3
0
to
4

0
22
to
29

Turn

back
two

turns
after

tightening

AT
61

PROPElLER
SHAFT
DIFFERENTIAL

CARRIER

PROPELLER
SHAFT

AND
CENTER

BEARING

CONTENTS

DESCRIPTION

REMOVAL
AND
INSTALLATION

DISASSEMBLY
AND
ASSEMBLY

INSPECTION

i

t

I
tl
J

I

O

148
5
5
85
PD
2

PD
2

PD
3

PD
3
CHECKING
AND

CORRECTING

UNBALANCED

PROPELLER
SHAFT

SERVICE
DATA

TROUBLE

DIAGNOSES
AND

CORRECTIONS

PD
4
PD
3

PD
4

2

483
19
02
750
29
53

987
38
86

Long
wheelbase
and

Deluxe
cab

models

Unit
mm
in
35

1
38

Front

5

Companion
flange

6
Plain
washer

7
Self

locking
nut

8

Flange

yoke
Rea

1
Sleeve

yoke

assembly

2
Center

bearing

3
Center

bearing
insulator

4

Center

bearing
bracket

DESCRIP
TION

The

propeller
shaft

on
the
620

series
is
3

joint

type

The

propeller
shaft

and
universal

joint

assembly
is

carefully
balanced

during
original

assembly
that
is
the

dynamic
unbalance
is
under
35

gr
cm

0
49
in

oz
at
S

800

rpm

If
the

propeller
shaft

has
to
be

assembled
it
must
be

made

carefully

so
that
the

above
limit
is
not
ex

ceeded
Therefore

when
the
vehicle
is

to
be
undercoated

cover
the

propeller

shaft
and

universal

joints
to

prevent

application
of
the

undercoating
ma

terial
9

Bearing
race

assembly

10

Snap
ring

11
Journal

assembly

PD218

Fig
PD

l

Crou
ctional
v
w

of
propelkr
hafl

REMOVAL
AND

INSTALLATION
3
Remove

bolts

connecting
shaft
to

companion
flange
of
differential

car

rier
See

Figure
PD
3

I
Raise
vehicle
on

hoist
Put
match

marks
both
on

propeller
shaft

and

companion

flange
so
that
shaft

can
be

reinstalled
in

the

original

position

2

Remove
bolts

retaining
center

bearing
bracket
See

Figure
PD
2

PD220

Fig
PD
3

Removing
propclkr
cha
t

PD219

Fig
PD
2

Removing
center

bearing

bruckel
4

Withdraw

propeller
shaft
sleeve

yoke
from

transmission

by

moving

shaft
rearward

passing
it
under

rear

axle

PD
2

PROPELLER
SHAFT
DIFFERENTIAL
CARRIER

Watch
for
oil

leakage
from
trans

mission

end

Notes

a
Remove

propeller
shaft
carefully

so
as
not
to

damage

spline
sleeve

yoke
and
rear
oil
seal

b

Plug
up
the

opening
in
the
rear
of

rear
extension

housing
to

prevent

oil
from

flowing
out

To
install

reverse
the

foregoing

removal

procedure

1

Align
propeller
shaft
with
com

panion
flange

using
reference
marks

prescribed
in
removal

procedure
and

assemble
with
bolts

Tightening

torque

2
4

to
3
3

kg
m

17

to
24
ft
Ib

2

Insert
bolts

through
the
holes
of

center

beariug
bracket
and

torque
nuts

to
retain
center

bearing
on
cross

member

Tightening
torque

1
6

to
2
2

kg
m

12
to
16
ft
Ib

DISASSEMBLY
AND

ASSEMBLY

Primarily
do
not
disassemble

pro

peller
shaft
because
it
is

balanced
as
an

assembly

However
check

propeller
shaft

with

journal
for
movement
When

journal
does
not
move

smoothly
dis

assemble

1
Mark

propeller
shaft
and

journal

so
that
the

original
combination
can

be
restored
at
assembly

2
Remove

snap
ring
with
a
standard

screwdriver

3
Lightly

tap
base
of

yoke
with
a

hammer
and
withdraw

bearing
race

See

Figure
PD
4

PDOO5

Fig
PD
4
Remo

i
bearing
Note
When

removing
journal
from

yoke
be
careful
not
to

damage

journal
and

yoke
bole

When

disassembling
and

repairing

center

bearing
are

required
the
follow

ing
procedures
are

applied

1
Put
match
marks
on

flange
and

front

propeller
shaft
Remove
bolts

connecting

flange
yoke
to

companion

flange

2

Applying
Drive
Pinion

Flange

Wrench
ST3lS30000
loosen
off
lock

ing
nut
and

remove
center

bearing
See

Figure
PD
5

P0172
ST31530000

Fig
PD
5
Remouing
locking
nut

To
assemble
reverse
the
foregoing

procedure
using
reference
marks

pre

scribed
in

disassembly
procedure

New

bearing
need
not
be
lubricated

since
it
is

lubricated
for
life
Fill

joint

with
recommended
multi

purpose

grease
whenever

propeller
shaft
is

overhauled

Use
related

snap
rings
of
the
same

thickness
and
be
sure
that

play
is

below
0
02
mm
0
0008
in

Available

snap
ring

Thickness

mm
in
Color

identification

2
00
0
0787

2
02
0
079S

2
Q4
0
0803

2
06
0
08
II

2
08
0
0819

2
10
0
0827

2
12
0
83S

2
14

0
0843
White

Yellow

Red

Green

Blue

Right
Brown

No

paint

Pink

PD

3
Install
and
assemble

components

correctly
so
that

joint
moves
under

friction
resistance
of
less
than
is
o

kg
em

13
in
lb

When
the

above

steps
are
complete

place
the

shaft
in

a

balancing
machine

and

adjust
unbalance
less
than
3S

gr
cm
0
49
in

oz
at
S
800

rpm

Center

bearing
assembling
pro

cedures
are
as
follows

I
Install
center

bearing
in

center

bearing
insulator

2
Install
center

bearing

assembly

and

companion
flange
on
front
shaft

usiug
reference
marks
established
in

disassembly

procedure

3
Install
washer
and

locking
nut
on

front
shaft

and

tighten
nut

using
Drive

Pinion

Flange
Wrench
ST3IS30000
to

specified
torque

Tightening
torque

20
0

to
24
0

kg
m

I4S
to
174
ft
lb

4
Join

companion
flange
of
front

shaft

with

f1ange
yoke
of
rear
shaft

and

tighten
connect
bolts
to

specified

torque

Tightening

torque

2
4

to
3

3

kg
m

17
to
24
ft
Ib

S
Install
center

bearing
bracket

on

center

bearing

INSPECTION

I
Check

journal
pin
for
dent
or

brinell
marks
and

yoke
hole
for

sign

of
wear
or

damage

Snap
ring
bearing
and
seal

ring

should
also
be

inspected
to
see
if
these

are

damaged
worn
or
deformed
Re

place
if

necessary

2
heck
center

bearing

by
rotating

bearing
race
If
it
is

rough
noisy
or

damaged
discard
Cracked

bearing

insulator
cannot
be
tolerated
here

3
Check

propeller
shaft
tube
sur

face
for
dent
or
crack

Change
if

necessary

PROPELLER
SHAFT

8l

DIFFERENTIALCAAR
ER

CHECKING
AND

CQRRECTING

UNBALANCED

PROPELLER
SHAFT
anced

propeller
shaft

proceed
as

follows

I
Remove

undercoating
and
other

foreign
materials
which
could

upset

shaft
balance
and

check
shaft

vibra

tion

by
road
test

2
If

shaft
vibration
is

noted

during
To
check

and
correct
an
unbal

SERVICE
DATA

Pe
issible

dynamic
unbalance

Axi

play
of

spider

journal

Journal

swinging

torque

Propeller
shaft
front

and
rear
out
of

round

Tightening
torque

Shaft
to

conipanion
flange
Gear
carrier
bolt

Self

locking
nut
front
shaft

Flange
yo
e
rear
shaft
to

companion
flange

front
shaft
bolt

Center

bearing
bracket
to
cross
member
bolt
road

test
disconnect

propeller
shaft
at

differential
carrier

companion

flange

rotate

companion

flange
180

degrees

and

reinstall

propeller
shaft

3

Again
check

shaft
vibration
If

vibration
still

persists
replace

pro

peller
shaft

assembly

gr
cm
in
oz

3S
0
49
at
S
800

rpm

mm
in

Less
than
0
02
0
0008

kg
em
in

Ib
Less
than
IS
O
13

mm
in

Less
than
0
6
0
024

kg
m

ft
lb

kg
m

ft
Ib

kg
m
ft
lb

kg
m
ft
lb
2

4
to
3
3
17

to
24

20
0
to
24
0

l4S
to
174

2
4
to

3
3
17
to
24

1

6
to
2
2

12
to
16

TROUBLE

DIAGNOSES
AND

CQRRECTIONS

Condition

Probable

cause

Vibration

during
at

medium

or

high
speed
Worn

or

damaged
universal

joint
needle

bearing

Unbalance

due
to
bent
or

dented

propeller

shaft

Loose

propeller
shaft

installation

Worn
transmission
rear

extension

bushing

Damaged
center

bearing
or
insulator

Tight
universal

joints

Undercoating
or
mud
on
the
shaft

causing

unbalance

Tire
unbalance

Balance

weights
missing

PD
4
Corrective

action

Replace

I
l
eplace

Retighten

Replace

Replace

Impact
yokes
with
hammer
to
free

up

Replace
joint
if
unable
to
free

up
or
if

joint

feels

rough
when

rotated

by
hand

Clean

up
shaft

Balance
wheel
and
tire

assembly
or

replace

from
known

good
vehicle

Replace

PROPELLER
SHAFT
DIFFERENTIAL

CARRIER

Condition
Probable

cause

Knocking
sound

during

starting
or
noise

during

coasting
on

propeller

shaft
Worn

damaged
universal

joint

Worn
sleeve

yoke
and

main
shaft

spline

Loose

propeller
shaft
installation

Loose

joint
installation

Damaged
center

bearing
or
insulator

Loose
or

missing
bolts
at

center

bearing

bracket
to

body

Scraping
noise
Dust

cover
on
sleeve

yoke
rubbing
on

transmission
rear
extension
Dust

c
ver
on

companion

flange
rubbing
on
differ
mtial

carrier

Whine
or
whistle

Damaged
center

bearing
Corrective

action

Replace

Replace

Retighten

Adjust
snap
ring

Replace

Replace
or

tighten
bolts

Straighten
out
dust
cover
to

remove

inter

ference

Replace

DIFFERENTIAL
CARRIER

TYPE
H190

CONTENTS

DESCRIPTION

REMOVAL

PRE
DISASSEMBLY
INSPECTION

DISASSEMBLY

INSPECTION

ASSEMBLY
AND

ADJUSTMENT

PRECAUTIONS
IN
REASSEMBLY

ASSEMBLY
OF
DIFFERENTIAL
CASE
PD
5

PD
7

PD
7

PD
7

PD
8

PD

PD
8

PD
8

DESCRIPTION

The

differential

carrier
on
the
620

series

has
a

gear
ratio
of
4
37S

The
drive

pinion
is

rnounted
in
two

tapered
roUer

bearings
which

are

pre

loaded

by
pinion

bearing
adjusting

spacer
and
washer

during
assembly

The
drive

pinion
is

positioned

by
a

washer
located

between
a
shoulder
of
ASSEMBl
Y

OF
DIFFERENT
Al

CASE

ADJUSTMENT

OF
DRIVE
PINION

HEIGHT

ADJUSTME
NT
OF
DRIVE

PINION

PRELOAD

t

ADJUST
ENT

OF
SIDE
8EARING

SHIMS

INSTAllATION

REPLACEME
NTOF
FRONT
Oil
SEAL

the
drive

pinion
and
the
rear

bearing

The
differential

case
is

supported
in

the
carrier

by
two

tapered
roller

side

bearings
These

are

preloaded

by
in

serting
shims
between

the

bearings
and

the
differential

case
The
differential

case

assembly
is

positioned
for

proper

ring
gear
and
drive

pinion
backlash

by

PO
5
PD
8

PD
9

PD
lO

PD
11

PD
13

PD
13

varying
these

shims
The

ring
gear
is

bolted
to
the

differential
case
The

case
houses
two
side

gears
in

mesh

with
two

pinion
mates

mounted
on
a

pinion
shaft
The

pinion
shaft
an

chored
in

the
case

by
lock

pin
The

pinion
mates
and
side

gears
are
backed

by
thrust
washers

The

carrier

is
of

malleable
cast
iron