1977 DATSUN PICK-UP manual transmission

Engine
Fuel

SERVICE
DATA
AND
SPECIFICATIONS

Airclelllcr

Ail
control
val

partially

opem

Air
ntrol
valve

fuUy
opens

Idle

ompensatoI

partially
opens

Hi
mettiNo

l

Bi
metal
No
2

Idle

ompen
tor

fully
opens

Bi
metal

No
1

Hi
metd
No
2

Fuels
Stem

Fuel

prtuure

Fuel

pump
apacHy

C
rbu
tor

C
rbu
tor

type

Carburetor
model
Oc

oF

oCe
F

oCe
F

Oc
OF

kpJcm2
poi

US

pt
min
at

rpm

Outlet
diameter

Venturi
diameter

Main

jet

Main
air
bleed

Slow

jet

Power
val

Float
level
U

fuel

preuure
rom
in

mm
in

mm

in

kg
cm2

psi

Adjustment

Engine
idling
Ignition
timing
Idle

speed
CO
at

mloro

Fuel
level

adjustment

Gap
between
Ive
stem
and
noat
at
mm

in

H

H

h

Fast
idle

adjwtmcnt
Fast
idle
earn

tint

step

Gap
between
throttle
IYe
and
carburetor

body

mm
in

Vacuum
break

adjustment

Gap
between
choke
alve
and
carburetor

body

mm

in

Choke
unloadel

adjusttncnt

Gap
between
choke
alw
and
carburetor

body

rom
in

Bi

metalsettinl

Bi
metal
resistance
at
2Ioe
700F

n

Bi
metalsettina

lnterloc
k

opcnina
of

primary
and

secondary

throtUc
valves
mmOn

Duh
pot

adjustment
without
loadin

I
m

Anti
diclClinasolenoid
valV
C

tiahtenina
torque

ka
m

in
lb

a
c
D
D
set

p
JSure

0
m
sea

level
and
760

mmHg

30
inlla
atmospheric
pressure
J
mmHa
inHg

R
C
D
D

tiahteninl
torque
kg
m

n
b
Nl
n
California
modell

Manual
transmiSsion

I
Automatic
transmission
California
modeb

Manual
transmission

I
Automatic
transmission

30
to
54
86
to
129

above

55
131
30
to
54
86
to
129

above
55

131

60
to
70

140
to
158

70
to
90

158
to
194
60
to
70

140
to
158

70
to
90

158
to
194

above
70

158

above
90

194
above
70

158

above
90

194

0
21
to
0
27
2
99
to
3
84

t
OOO

2
i
I
OOO
0
21
to
0
27
2
99
to

3
84

1
000
2
i
I
OOO

Strombcra
type

OCH340
7A
DCH340
48A
Stromt
rg

type

DCH34Q
45B
DCH340
46A

Primary
Secondary
Primary
Secondary
Primary
Secondary
Primary
Secondary

30
I8t

340
339
30
1
181
34
1
339
30
1
181

34
1
339
30
1

181
34
1
339

24
0
945

310
220
24
0
945
31
1
220
24
0
945
31
1
220
24
0
945
31
1
220

199
1160
199
1160
1101
1160
101

1160

170
160
170
160
170
60

170
1
60

148
1100
148
1100
148
1100
148
180

143
143
140
140

23
0
906
23
0
906
23
0
906
23

0
906

0
17
2
408
0
17
2
40B
0
17
2
408
0
17
2
408

1201750

rpm
CO

2
1
120

650

rpm
0

100
750rpm
C02
t
1
120
650

rpm
0

position
CO

2
t
1

position
CO
2
t
1

7
2

0
283
7
2
0
283
7
2
0
283
7
2
0
283

23
0
906
23

0
906
23
0
906
23
0
906

1
3
to
1
7
1

3
to

1
7
1
3
to

1
7
1
3
to
1
7

0
051
to
0
067
0
051
to
0

067
0
051
to
0
067
0
051
to
0
067

1
33
to
1
47
1
58
to
1
72
1
33
to

1
47
1
58
to
1
72

0
0524
to
0
0579
0
0622
to

0
0677
0
0524
to
0
0579
0
0622

to
0
0677

1
42
0
056
1
42
0
056
1
42
0
056
1
5
0
059

2
45
0
096
2
45
0
096
2
4
0
096
2
45
0
096

3
7
to

8
9
3
7
to
8
9
3
7
to
B
9
3
7
to
8
9

Center
of
the
ndex
mark
Center
of
the
index
mark

7
38
0
291
7
38
0

291
7
38
0

290
7
38
0
291

1
900
to

2
100
1
650
to

1
850
1
900
to
2
100
1
650
to

1
850

180
to
350

156
to
304
180
to
350

156
to
304
180
to
350

156
to

304
180
to
350

156
to
304

510
to

550
490
to

530
510
to
550
490
to
530

20
1
to
21
7
19
3
to

20
9
20
1
to
21
7
19
3

to
20
9

20
to
40

17
4
to
34
1
20

to
40

11
4
to
34
7
20
to
40

17
4
to
34
7
20
to

40
17
4
to
34
1

EF
35

REMOVAL

AND

INSPECTION

Removal
and

inspection
can
be

done

as
follows

Removal

Catalytic
converter

1

Apply
parking
brake

2

Place
wheel
lock
under
each
tire

3

Jack

up
the
vehicle

4
Remove
lower
shelter
of

catalytic

converter

5
Dismount

catalytic
converter

EC453

Fig
EC
69
Removing

catalytic

conuerter

Inspection

Preliminary
inspection

Visually
check
condition
of
all

component
parts
including

ho
s

tubes
and
wires

replace
if

necessary

Refer
to

Inspection
of
A
I
S
on

page
EC
17

Catalytic
converter

Whether

catalytic
converter
is
nor

mal
or
not
can
be
checked
by
ob

serving
variation
in

CO

percentage

The

checking

procedure
is

as
follows

Apply
parking
brake
Shift

gears

into
Neutral
for
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1

Visually
check

catalytic
converter

for

damage
or
cracks
Emission
Control

System

2
Remove
air
hose
between

5

way

connector
and
air
check
valve

Plug
the

disconnected
hose
to

prevent
dust

from

entering
Refer
to

page
ET
12

3

Check
carburetor

pipes
for

proper

connection

4

Warm

up
engine
sufficiently

5

Race

engine
1

500
to
2
000

rpm

two
or
three
times

under
no
load
then

run

engine
for
o
e
minute
at

idling

speed

6

Adjust
throttle

adjusting
screw

until

engine
attains
to

specified
speed

Refer
to

page
ET
10

7
Check

ignition
timing
If
neces

sary
adjust
it
to

specifkations
Refer

to

page
ET
10

B

Adjust
idle

adjusting
screw
until

specified
CO

percentage
is

obtained

Refer
to

page
ET
12

9

Repeat
the

adju
stment

process
as

described
in

steps
5
to
8
above

until

specified
CO

percentage
is
obtained

Note

Adjustment
in

step
9
should
be

made
ten

minutes
after

engine
has

wanned

up

10
Race

engine

1
500
to
2
000

rpm
two
or
three
times

under
no
load

and
make
sure
that

specified
CO

per

centage
is
obtained

11
Remove

cap
and
connect
air

hose
to

air
check
valve

If

idling

speed
increases

readjust
it

to

specified
speed
with
throttle
ad

justing
screw

12
WaRn

up
engine
for

about
four

minutes
at
2
000

rpm
under
no
load

13
Measure
CO

percentage
at

idling

speed
After

step
12
has
been
coin

pleted
wait

for
one
minute
before

making
CO

percentage
measurement

14
If
CO

percentage
measured
in

step
13
is
less
than
0
3

the

catalytic

converter

is
normal

15
If
CO

percentage
measured
in

step
13
is
over
0
3

recheck
A
I
S

and

replace
air
check
valve
Then

perform
inspection
steps
12
and
13

EC
27
16
If
CO

percentage
is

still
over

0
3
in

step
15

catalytic
conyerter
is

malfunctioning
Replace
catalytic
con

verter

INSTALLATION

To
install

reverse
the
removal

pro

cedure

Bolt

lightening

torque

specifications

Tightening

torque

Catalytic
converter

2
6
to
3
4

kg
m

19
to
25
ft
Ib

FLOOR

TEMPERATURE

WARNING
SYSTEM

DESCRIPTION

The
floor

temperature
warning

system
consists
of
a
floor

temperature

sensing
switch
installed

on
the
vehi

cle
s
floor
floor

temperature
relay
and

a

warning

lamp
on
the
instrument

panel
and
wires
that
connect
these

parts

When
the
floor

tempera
ture
rises
to

an
abnormal
level
the

warning
lamp

will

light
to
call
the
attention
of
the

driver
The

wiring
diagram
of
this

system
and
location
of
the

floor

temperature
sensing
switch
are
ilIus

trated
in

Figures
EC
70
and
EC
71

Floor
temparature
warning

lamp

Refer

to

Figure
EC
74

for
the

loca

tion
of
this

part

L

1t

1

RAt

Fig
EC
74
Location
of
floor

temperature
warning
lamp

INSTALLATION

To
install
reverse
the
order
of

rem
ovaL

INSPECTION

Floor
warning
temperature

system

Apply
parking
brake
Shift

gears

into
Neutral
foI
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1
Ensure
that
floor

temperature

warning

lamp
lights
when

ignition

switch
is
iumed

to
the
S

position

If

not
check

lamp
for
burned

bulbs

Replace
bulb
if
bulb
is
burned
out

If

bulb
is

not
burned
trace
wire
s

back
to

ignition
switch

Repair
or

replace
if

necessary

2
Be

sure
that
floor

temperature
is

cool
below
800C

1760Fj
before

carrying
out
the

following
procedure

I
Remove
rearseat

2

Ignition
switch
is

turned
to
the

IG

position

3
Ensure
that
floor

temperature

warning
lamp
goes
out

4
Heat

surrounding
areas
of
floor

temperature
sensing
switch
with
a

proper
heater
to
ensure
that
floor

temperature
warning
lamp
glows
when

floor
is
heated

to
the

specifications
as

shown
in
the
table
below
Emission
Control

System

Temperature

sensing
switch

Contact
close
Temperature

warning
lamp

Off

Contact
open
On

Note

Avoid

heating
floor

tempera

ture

sensing
switch

directly

If

lamp
does

not
glow
check
floor

temperature
sensing
switch
connector

for

continuity
with

a
circuit
tester

If

continuity
should
exist
after

heated

surrounding
areas
of
floor
tem

perature
sensing
switch

replace
tem

perature
sensing
switch

If
con

tinuity
does

not
exist

trace

the

wiring
back
to

relay
or
check
the

following
step
3

Repair
or

replace

wire
s
if

necessary

Note
The

floor

temperature
sensing

switch

may
be
heated

through
the

floor

by
a

proper
heater

3
Turn

ignition
switch
to
the

IG

position
and
disconnect
floor

temper

ature

sensing
connector
The

lamp

should
remain

on
If

not
check
floor

temperature
relay
for

continuity
with

2
00

r
I

141

J

To
floor

temperatwe

warning
lamp

2
From

S

position

3
From

IG

position

4

From

ignition
switch

5
To
floor

temperature

sensing
switch
O

When
floor

temperature

warning
lamp
lights

Check
floor

temperature
warning

lamp

1

Open
or

shorj
circuit
in

wiring

harness

2

Check
fuel

system
with

regard
to

the

following
items

Refer
to

Inspec

lion
of
Fuel

System

EC
29
Floor

temperature

Below
1050C
221
OF

Above

1050C
221
OF

a
circuit

tester

Referring
to
the

following
floor

temperature
relay
if

relay
is
normal

trace
wire
s

back
to

ignition
switch

Repair
faulty
wiring

Floor

temperature
relay

When

checking
floor

temperature

relay
for
unit

remove
it
and

proceed

as
follows

1

Check
for

continuity
between

@

and

ID
Continuity
should
exist

Check
for

continuity
between

CD

and@
Continuity
should
exist

Check
for

continuity
between

CD

and

@
Continuity
should
not

exist

2

Apply
a
12

volt
doc
across

@
and

ID
to

ensure
that

continuity
exists

between

CD
and

@
and
that

con
ti

nuity
does

not
between

CD
and

@
If

test
results
dn

not

satisfy
the
above

replace
the

floor

temperature
relay

EC344

Fig
EC
75

Checking
floor
temperature
relay

1
Float
level

2
Choke

3

Normal
fuel

supply
system
Prima

ry
and

secondary

4
Accelerator

pump

5
Power
valve

6
B
C
D
D

7
Fuel
strainer

8
Air
cleaner

Engine
Electrical

System

SERVICE
DATA
AND
SPECIFICATIONS

Type

System
voltage

No
load

Terminal

voltage

Current

Revolution
v

V

A

rpm

Brush

length
Outer
diameter
of
commutator
mm
in

mm
in

Brush

spring
tension

kg
Ib

Clearance
between

bearing
metal
and

armature
shaft
mm
in

Clearance
L
between

pinion
front

edge
and

pinion
stopper
mm
in

TROUBLE
DIAGNOSES
AND
CORRECTIONS

Condition

Starting
motor
will

not

operate

Noisy
starting
motor

Starting
motor

cranks

slowly
Probable
cause

Discharged
battery

Damaged
solenoid
switch

Loose
connections
of
terminal

Damaged
brushes

Starti

g
motor

inoperative

Loose

securing
bolt

Worn

pinion

gear

Poor

lubrication

Worn
commutator

Worn
brushes

Discharged
battery

Loose
connection
of
terminal

Worn
brushes

Locked
brushes

EE
ll
Manual

transmission
Automatic

transmission

Optional

for

manual

transmission

SII4
ISOB

S114
170B

12

12

Less
than

60

More

than
7

000
More
than
6
000

More
than
39

1
54

More
than
12
0
47

1
4

to
I
S
3
1
to
4
0

Less
than

0
2
O
OOS

0
3
to
1
5
0
012
to
0

059

Corrective
action

Charge
or

replace
battery

Repair
or

replace
solenoid
switch

Clean
and

tighten
terminal

Replace
brushes

Remove

starting
motor
and
make
test

Tighten

Replace

Add
oil

Replace

Replace

Charge

Clean
and
tighten

Replace

Inspect
brush

spring
tension

or

repair
brush

holder

CHECKING
AND

ADJUSTMENT

CAP
AND
ROTOR
HEAD

Cap
and
rotor
head
should
be
in

spected
periodically
as

specified
in
the

Maintenance
Schedule
Remove
cap

and
clean
all
dust
and
carbon
deposits

from

cap
and
rotor
If

cap
is
cracked

or
is

leaking
replace
with
a
De
one

CONTACT
POINT

Contact

point
should
be

replaced
in

accordance
with
the
Maintenance

Schedule

Standard

point
gap
is
0
45
to
0
55

mm
O
OIS
to
0

022
in
In

case
size

is
off
the
standard

adjustment
is
made

by
loosening
point
screws

Gap
gauge

is

required
for

adjustment

When

point
surface
is

rough
take

off

any
irregularities
with

fine
sand

paper
of
No
500
or
600
or
with
oil

stone

When
wear

on
contact

points
is

noticeable
replace
points
together

with
contact

arm
To

replace

proceed

as

follows

EE322

Fig
EE
58
Adju
ting
point

gap

EE321

I

Primary
lead
termina

2
Ground
lead
wire

3
Set
screw

4

Adjuster

5
Screw
Fig
EE
59
Breaker
Engine
Electrical

System

First
turn
out
set

screws
1
to

1
5

turns
at
contact
arm
and

primary
lead

wire

connection

just
for

enough
to

pull
out

primary
lead
terminal

Referring
to

Figure
EE

59
unSCrew

two
contact
set

fixing
screws

and

remove
lead
wire

While

holding
contact
arm

by

fingers

pull
out
contact
set

toward

you
by

raising
it

slightly
Contact

point
and

afm
can

then
be

removed

together

Install
new
contact

point
and

arm

assembly
in

reverse
sequence
of

removal

Coat
cam
with
a

light
coating

of

grease

ADVANCE
MECHANISMS

Specifications

Application

Vacuum
advance

Distributor

degrees
distributor

mmHg
inHg

Centrifugal
advance

Distributor

degrees

distribu
tor

rpm

For
Canada

Vacuum

advance
mechanism

mechanical

parts

If
vacuum
advance
mechanism
fails

to

operate
properly
check
for
the

following
items

and
correct
the
mal

function
as

required

1
Check
vacuum
inlet
for

signs
of

leakage
at
its

connection

Ifnecessacy

retighten
or

replace
with
a
new
one

2
Check
vacuum

diaphragm
for
air

leak

If
leak
is

found

replace
vacuum

controller

assembly

3

Inspect
breaker

plate
for
smooth

moving

If

pia
te
does
not

move

smoothly

this
condition
could
be
due
to

sticky

steel
balls
or

pivot
Apply
grease
to

steel
balls
or
if

necessary

replace

breaker

plate
as
an

assembly

EE
31
CONDENSER

Satisfactory
performance
of
con

denser

depends
on

capacity
and

degree

of
insulation

requiring
attention

to
be

sure

that
terminals
are
clean
and
set

screws
are

tight

Checking
of

condenser
is
made

by
a

condenser
tester

D4A4
06

D4A6
07
D4A4
07

D4A6
0S

Automatic

transmission
Manual
transmission

00
150
5

91

30
250
9

S4
00
170
6

69

6
50
300

1I
S1

00
550

11
0

2

300
00
600

110
1
950

Centrifugal
advance

mechanical

parts

When
cause
of

engine
malfunction

is

traced
to

centrifugal
advance
me

chanical

part
use
distributor
tester
to

check
its
characteristic

See
the

specifications
above

When

nothing
is

wrong
with
its

characteristic
conceivable
causes
are

break
down
abnormal

wearing
out
of

driving
part
or
others
So
do

not

disassemble

it

In

case
of

improper
characteristic

take
off
contact
breaker

assembly
and

check

closely
cam

assembly

governor

weight
shaft
and

governor
spring
etc

In
case

centrifugal
advance
me

chanical

part
is
reassembled
be

sure
to

check
advance
characteristic

by
dis

tributor
tester

Engine
Removal

Installation

ENGINE

REMOVAL
AND
INSTAllATION

REMOVAL

INSTALLATION

ENGINE
MOUNTING
INSULATORS

REMOVAL

It
is
much
easier

to
remove

engine

and
transmission

as
a

single
unit

than

to

remove
them

separately
After
re

moval

engine
can
be

separated
from

transntission

assembly

Notes

a
Be

sure
to
hoist

engine
and

jack
up

transmission
in
a
safe
manner

b
Use

fender
cove
to

protect
vehicle

body

1
Remove

battery

2
Scribe

hood

hinge
location
for

proper
reinstallation
and
remove

hood

Note
Have

an
assistant

help
you
so
as

to

prevent
damage
to

body

3
Drain

radiator
coolant

4

Disconnect

upper
and
lower

radiator
hoses

from

engine

5

Remove

two
oil
cooler
hoses

from
lower

end
of
radiator
Auto

ma
tic
transmission

models

only

6
Remove

radiator

shroud

7

Remove
four

bolts

securing
radia

tor
and

detach
radiator

Note

Always
tighten
securing
bolt
at

upper
right
hand
side

together
with

body
harness

terminal

8

Remove
carburetor
air

cleaner
as

follows

Remove
fresh
air

duct

Remove

hot
air

duct

Loosen
air

cleaner
band

bolt
and
air

cleaner

supporting
bolts

Disconnect
air

cleaner
ta
air

pump

hose

Disconnect
air
cleaner

to
rocker

cover
hose
at

rocker

cover

Disconnect
air

cleaner

to
air

control

valve
hose
California

models

only
CONTENTS

ER
2

ER
3

ER
3
FRONT

INSULATOR

REAR

INSULATOR

TIGHTENING

TORQUE
ER
4

ER
4

ER
4

Disconnect
air

deaner
to

A
B
valve

hose

Disconnect
air

cleaner
ta

vacuum

hoses

Note

Protect
carburetor
from
dust

and

foreign
matter

by

placing
cover

over
air
inlet

opening

9

Disconnect

fuel

pump
to
fuel

fdter
hose
and
return

hose

10

Disconnect
carbon
canister

hose

on

engine
side

II

Disconnect
air

pump
air

C1eaner

to
al

p

p
hose

12

Disconnect

following
cables

wires

and
hoses

Engine
ground
cable

Accelerator
wire
at

carburetor

High
tension

cable
between

ignition

coil

and
distributor

Wire

to
distributor
at

body
ter

minal

Wire
to

oil

pressure
switch

Wires
to
thermal

transmitter

Wires
to

B
C

p
D
cut
solenoid

Non
California

models

only

auto

choke
heater
and

anti

dieseling

solenoid

Wires

to
alternator

Wires
to
starter

motor

Heater
inlet
and
outlet

hoses
if
so

equipped

Vacuum
hose
of

Master
Vac
at
in

taJce
manifold

Wires
for

back

up

lamp
switch

Cable
to

speedometer

13

Remove
transmission

control

linkage
from

transmission

Manual

transmission
models

I

Detach
rubber
boot

2
Remove
E

ring
and
control

lever

pin
from

transmission

striking
rod

guide
and

remove
control
lever

ER
2
Fig
ER
l

Automatic

transmission
models

I

Disconnect

selector

range
lever

from
manual
shaft

2
Disconnect
wires

at
inhibitor

switch
and

down
shift
solenoid

14
Air

conditioner

equipped

models
need

following

procedures

1
After

removing
flexible

hose

support
remove
four

comi
ressor

se

curing
bolts

Then
move
the

com

pressor
to

battery

support

2

Remove

vacuum
hoses
of

F
LC
D
solenoid
valve

3
Remove
F
LC

D
actuator

15
Remove
two
bolts

securing

clutch

operating
cylinder
Then
dis

connect

operating
cylinder
and

flexi

ble
tube

as
an

assembly

Manual

transmission

models

only

16
Disconnect
front

exhaust
tube

from
exhaust
manifold

17
Remove

propeller
shaft

I

Disconnect

propeller
shaft

center

bearing
bracket
from

third

crossmember

2

Disconnect

propeller
shaft
from

companion
flange
of
differential

carrier

3
Remove

propeller
shaft
from

transmission

and

plug

up
rear
end
of

extension

housing
of

transmission
to

prevent
oil

leakage

18
Attach
a
suitable
wire

or
chain

to
lift

engine

19
Remove

front

engine
mounting

bolts

at

engine
mounting
front

sup

port

DATSUN
PICK

UP

MODEL
620

SERIES

I
NIS

J

NISSAN
MOTOR
CO
LTD

TOKYO
JAPAN
SECTION
MT

MANUAL

TRANSMISSION

4
SPEEo
TRANSMISSION

MT
2

TYPE

F4W71
B

5
SPEED

TRANSMISSION

MT
14

TYPE

FS5W71
B

SERVICE
DATA
AND

MT
21

SPECIFICATIONS

TROUBLE
DIAGNOSES
AND

MT
23

toRRECTloNS

SPECIAL
SERVICE
TOOLS

MT
24

Manual

Transmission

4
SPEED

TRANSMISSION
TYPE

F4W71B

CONTENTS

DESCRIPTION

REMOVAL

DISASSEMBL
Y

TRANSMISSION
CASE

DISASSEMBLY

D

ISASSEMBL
Y
OF
GEAR

ASSEMBLY

REAR

EXTENSION

DISASSEMBLY

ADAPTER

PLATE

DISASSEMBLY

INSPECTION

TRANSMISSION

CASE
AND

REAR

EXTENSION
HOUSING

BEARING
GEARS
AND
SHAFTS

BAULK
RING

Oil

SEAL

ASSEMBL
Y

FRONT

COVER
ASSEMBLY

REAR

EXTENSION
ASSEMBLY

ADAPTER

PLATE

ASSEMBLY

GEAR

ASSEMBLY

TRANSMISSION

ASSEMBLY

INSTALLATION
MT
2

MT
4

MT
4

MT
4

MT
5

MT
B

MT
8

MT

8

MT
B

MT
8
MT
8

MT
9

MT

9

MT
9

MT
9

MT
9

MT
9

MT
9

MT13

MT14

DESCRIPTION

pUshed
the
inner

teeth
of
the

coupling

sleeve
slide
over
the

synchronizer
hub

and
mesh
with

the
outer
teeth

which

are

provided
on
the
mainshaft

gear

The

synchronizer
hub
is
fitted
to

the
mainshaft

by

splines
so
the
main

shaft

gear
turns
together
with
the

mainshaft

The
baulk

ring
serves
to

synchro

nile

the

coupling
sleeve
and
mainshaft

gear

Placing
the
control
lever
in
reverse

position
brings
the
reverse
idler

gear

into

mesh
with
mainshaft
reverse

gear
The
transmission
is
of
a
4

speed

forward

fully
synchronized
constant

mesh

type
that

uses
helical

gears

The

reverse

gear
is
ofa

sliding
mesh

type
using
spur
gears

In
construction
the

main
drive

gear

is
meshed
with
the

counter
drive

gear

which
is

keyed
to

the
countershaft

The
forward

speed

gears
on
the

coun

tershaft

are
in

constant
mesh
with
the

mainshaft

gears
which
ride
on
the

mainshaft

freely
through
the
needle

bearing
When

shifting
is

accom
The
transmission

assembly
consists

of
three
main

parts
a

transmission

case
with
clutch

housing

adapter
plate

to
which
an

gears
and
shafts
are

installed
and
rear
extension

The
cast
iron

adapter
plate

supports

the
mainshaft
countershaft

reverse

idler
shaft
and
three
fork
rods
and

bolted

at
the
front

to
the

transmission

case
and
at
the
rear
to
the
rear

extension

by
means
of

through
bolts

By
removing
these

through
bolts
all

gears
and
shafts
are

stripped

e

TM

858

1

Front
cover

2
Transmission
case

3

Adapter
plate

4

Bearing
retainer

5

Rear
extension

hOUsing

Fig
MT
1
F4W71B
lrammiasion
case

compon
nt

MT
2