DATSUN PICK-UP 1977 Service Manual

Emission
Control

System

C
bur
tor

I

EC284

When

installing
this
valve

ensure

that
it

properly
oriented
Tlus
valve

shuuld
be

replaced
periodically
Refer

to
Maintenance
Schedule

Note
Carburetor
side
Black

DisInDutor
side

Brown

horn
distributor

To

carburetor

TOdi

ribUI0
carburClor

EC
lCiJr

Fig
EC

9
Operation
01

park
delay

value

INSPECTION

Remove

spark
delay
valve

2
Blow

air

through
port
on
carbure

tor

side
then

through
the

other

port

on
distributor
side

Spark
delay
valve
Distributor
side

1
One
way
umbrella
valve

2
Sintered
metal

disc

Fig
EC
8

Spark
delay
valve

is
in

good
condition
if
when

finger
is

placed
over

port
on
distributor
side

air

flow
resistance
is

greater
than
that

on
the

other
side
See

Figur
ET
lO

3
If
a

considerable
air
flow
resist

ance
is

fell
at

port
on
distributor
side

in

step
2

above
and
if

the
condition
of

spark
delay
valve
is

questionable
dip

port
on
carburetor
side
into
a

cup

filled
with

water
Blow
air

through
the

other

port
Small
air
bubbles
should

appear

Carburetor
side

Distributor
side

EC346

Fig
EC
IO

Checking
park
delay
valve

EC
8
EC219

Fig
EC

11

Checking
spark
d

tay
valve

Note
Be
careful
to
avoid

entry
of
oil

or
dirt
into
valve

AIR
INJECTION

SYSTEM

DESCRIPTION

The
Air

Injection

System
A

LS
is

aeSigiieino

iiiject
coin

pressed
air
sec

ODllary
air

corning
from
the
air

pump

into
the
exhaust
manifold
to
reduce

hydrocarbons
and
carbon
monoxide
in

exhaust
lri
s

through
re
combustion

There

are
two

types
of
A

I

S
One

type
is
mounted
on
California
models

and
the
other
is
on
non
California

models
The
non
California

type
con

sists
of
an
air

pump
air

cleaner
an
air

pump
a
relief

valve
a
check
valve
an

anti

backfIre
valve
an
air

gallery
and

hoses
The
California

type
has
in

addition
to
the

components
of
the

non
California

type
an
air
control

valve
and

an

emergency
air
relief
valve

These
valves

prevent
ahnonnal
tem

perature
rise
of
the

catalytic
converter

Emission

Control

System

EC
9
1
Check
valve

2

Air

gallery
pipe

3
Automatic

temperature
control

air
cleaner

4
Air

hose
carburetor

air
cleaner

to
A
B

val

5
Anti
backfire
valve
A
B

valve

6
Air
hose
A

B
valve
to
intake

manifoW

7
Air
hose
carburetor
air
cleaner

to
aU
hose
connector

8
Air
hose
check
valve
to

air
hose

connector

9
3

way
connector

10
Air
hose
air
hose
connector
to

air

pump

11
Air
hose
air

pump
to
air

pump

air

cleaner

12
Air

pump
air

cleaner

13
Air

pump

EC776

Fig
EC
12
Non

California
type
A
I
S

1
Air
control

valve

2
Check

val

3
Air
hose
check
valve
to
air

hose

connector

4
Air

gallery
pipe

5
Automatic

temperature
control

air
cleaner

6
Air
hose
carburetor
air

cleaner

to
A
B

val

7
Anti
backfire
valve
A
B
valve

8
Air
hose
A
B

valve
to
intake

manifold

9
Air
relief
valye

10
Air
hose
carhuIetor

air
cleaner
to

air
control

valve

11

Air
hose
air
relief
valve
to
air

hose
connector

12
Air
hose
air
hose
connector
to

emergency
air
relief
valve

13

Emergency
air
relief
valve

14
Air

pump
air
cleaner

15
Air

hose
air
hose
connector
to

air

pump

16
Air
hose
air

pump
to
air

pump

air
cleaner

17
Air
pump

EC777

Fig
EC
13
California

typo
A
I
S

Air

pump
aIr
cleaner

The

air
cleaner
element

is
a
viscous

paper
lype
and

requires
periodic
re

placement
The
air

pump
air

cleaner
is

bolted
to
the
left
front

of
the
hood

ledge

EC778

Fig
EC
14
Air

pump
air
c
leantr

Air

pump

The
air

pump
is

a
two
vane

type
It

has
two

positive

displacement
vanes

which

requires
no

lubricating
seJVice

i

lJ1

I

Jr

l
Emission
Control

System

The
die
cast
aluminwn
air

pump

assembly
attached
to
the
front
of
the

engine
is
driven

by
an
air

pump
drive

belt
A
rotor

shaft
drive
hub

inlet
and

outlet

tubes
are
visible
on
the

pump

exterior
A

rotor
vanes
carbon
shoes

and

shoe

springs
make

up
the

rotating

unit
of
the

pump
The
rotor

located
in

the

center
of
the

pump
is
belt
driven

The

vanes
rotate

freely
around
the

ofT
center

pivot
pin
and
follow

the

circular

shaped

pump
bore
In

the

two
vane

type
the

vanes
form

two

chambers
in
the

housing
Each

vane

completes
a

pumping
cycle
in

every

revolu
tion
of
the
rotor
Air
is
drawn

into
the

inlet

cavity
through
a
tube

connected
to
the

air

pump
air

cleaner

Air
is
sealed
between
the

vanes
and

moved

into
a

smaller

cavity
the

com

pression
area

After

compression
a
vane

passes
the

outlet

cavity

Subsequently
it

passes
the

stripper
and
a
section

of
the

housing
that

separates
the
outlet
and

inlet
cavities
and

again
reaches
the

inlet

cavity
to

repeat
the

pumping

cycle

Carbon
shoes

in
the
slots
of

the

rotor

support
the

vanes

They
are

designed
to

penni
t

sliding
of
the

vanes

and

to
seal
the

rotor
interior

from
the

air

cavities
Leaf

springs
which
are

behind

the

leading
side
of
the
shoes

compensate
for
shoe
abrasion

The
rotor

ring
is

a
steel
bolted
to

the
rotor
end
It

positions
ihe

rotor

and
holds

the
carbon

shoes

The

vane
uses
needle

bearings
All

bearings
have
been

greased

There

are
two

typCg
of

bearing

which

support
the

rotor
Ball

bearing

is

used
for
the
front

one
and
the

needle

bearing
is

used
for
the
rear

j

1
Air

pump
drive

hub

2
HOII

ing

3

Rotor

ring

4
End
cover
with

needle

bearing

5
Vane

6

Carbon
shoe
j

7
Shoe

spring

8

Stripper

9
Rotor
shan

10
Ball

bearing

II
Front

bearing
cover

12

Pulley

13

PuDey
for
air

con
itioner

EC560

Fig
EC

15
Stctionol
view

ofoir
pump
twtrvone

type

EC
IO

Air
control
valve

CalifornIa
models

The
air
control
valve

con
troIs
the

quantity
of

secondary
air
fed

from
the

air

pump
according
to

engine
speed

and

load
condition
and

prevents
ex

cessive

temperature
rise
of
the

cataly

tic
converter

The
construction
is
as
shown
in

Figure
EC
16
The
intake
manifold

vacuum
and
air

pump
discharge
pres

sure

applied
to

the

diaphragm
chamber

actuate
the

valve
which
is

coupled
to

the

diaphragm
and
control
the

quanti

ty
of

secondary
air
to
be
fed
into
the

exhaust
manifold
in

response
to
the

engine
condition

c
From

air

pump

To

carburetor

air
cleaner

lr

J

EC291

Fig
EC
16
Air
control
valve

Anti
backfire
valve

This

valve
is

con
trolled

by
intake

manifold
vacuum
to

prevent
backfire

in
the

exhaust
system
at

the
ini

tial

period
of
deceleration

At
this

period
the
mixture
in
the

intake
manifold
becomes
too

rich
to

ignite
and
burn
in
the

combustion

chamber
and
burns

easily
in
the
ex

haust

system
with

injected
air
in
the

exhaust
manifold

The
anti
backfire
valve

provides
air

to
the
intake
manifold
to
make
the

air
fuel
mixture
leaner
and

prevents

backfire

A
schematic
drawing
of
the
anti

backfire
valve
is
shown
in

Figure

EC
17

The
anti
backfire
valve
inlet
is

con

nected
to
the
air
cleaner
and
the

outlet

to
the
intake
manifold

Th
correct
function
of
It
jS
valve

reduces
hydrocarbon
emission

during

aeceleration

If
the
valve
does
not
work

properly

unburned
mixture
will
be

emitted
Emission
Control

System

from
the
combustion
chambers
and

burns
with
the
aid
of
high

temperature

and

injected
air

which
causes
backfire

I
Tointake

c
manifold

vacuum

I

L

AirdisChaJ1le

I

to
mtake

manifold
From
air

cleaner

ECQ69

Fig
EC
11
Anti
back
ir
valve

Check
valve

A
check
valve
is
located
in
the
air

pump
discharge
lines
The
valve

pre

ven
ts
the
backflow
of
exhaust
gas

which
occurs
in

one
of
the

following

cases

1
When

the
air

pump
drive
belt

fails
2
When
relief
valve

spring
fails

Construction
is

shown
in

Figure

EC

18

F
rom

m

pump

1

Spring

2

Rubber
valve

3

Seat
Secondary
air

Exhaust

gas

EC292

Fig
EC
1B
Check
valve

AIr

InJaction
Into
axhaust

port

The

secondary
air

fed
from
the
air

pump
goes
through
the

check
valve
to

the
air

gallery
where
it
is
distributed
to

each
exhaust

port
The

secondary
air

is
then

injected
from
the
air

injection

nozzle
into

the
exhaust

port
near
the

exhaust
valve

n

L
y

r

V

Air
pump
relief
valve

The
air

pump
relief
valve

controls

the

injection
of
the

secondary
air
into

the
exhaust

system
when
the

engine
is

EG
11
3
I
Air

gallery

2

Exhaust
port

3
Air

jnjection
nozzle

4
Exhaust

manifold

EC293

Fig
EC
19
Air
injection
into
exhaust

port

running
at

high
speed
under
a

heavily

loaded
condition
It

accomplishes
the

following
functions
without

affecting

the

effectiveness
of
the
exhaust
emis

sion
control

system

Minimizes
exhaust

gas
tempera

lure
rise

2
Minimizes

horsepower
losses
re

suiting
from
air

injection
into
the

exhaust

system

3
Protects

pump
from
excessive

back

pressure

The
air

pump
relief
valve
is
installed

as
shown
in

Figure
EC

20

The

secondary
air
is

discharged

from
the
air

pump
relief
valve

to
the

dust
side
of
the
carburetor
air
cleaner

To
carburetor

air
cleaner

Secondary

air

To
carburetor

air

cleaner

J
erCOndary

r

r

EC294

Fig
EC
20
Air

pump
relief
valve
Emission
Control

System

Emargency
air
retial
valve

E
A
R
Valve

California
models

The

emergency
air
relief
valve
con

trols
the

quantity
of
secondary
air

fed

from
the
air

pump
according
to

load

condition
and
it

discharges
the
see

ondary
air
into
the

atmosphere
to

prevent
overheating
of
the

catalytic

converter

The

emergency
air
relief
valve
con

sists
of
a

diaphragm
a

spring
and

a

valve
which
is

coupled
to

diaphragm

1

Diaphragm

2

Val

3

Spring

4

Diaphragm
chamber

EC536

Fig
EC

21

mergency
air

relief
valve

OPERATION

As
mentioned

previously
there

are

two

types
of
Air

Injection
Systems

A
I

S
a

non
California

type
and
a
California

type
The
California
stand

ard

type
includes
a

system
which

controls

injection
of

secondary
air

so

as
to
assure

proper
function
of
the

catalytic
converter
and
a

system

which
controls
the

supply
of
second

ary
air
to

prevent
abnormal

tempera

tUfe
rise
in
the

catalytic
converter

The
A
I
S
consists
of
the

following

systems

L
A

system
which
allows

injection

of

secondary
air
into
the
exhaust

port

2
A

system
which

bypasses
sec

ondary
air

from
the
air

pump
relief

valve

to
the

carburetor
air

cleaner

during

high
speed
engine
operation

3
A

system
which

supplies
air

from

the
carburetor
air
cleaner

to
the
intake

manifold

by
means
of
the
anti

backfire

valve
so
as
to

prevent
after
fire

during

deceleration

4
A

system
which

controls

injection

of
the

secondary
air

by
means
of
the

air

control
valve

so
as
to
maintain
the

catalytic
converter
at
an

optimum

temperature
level
under

lightly
loaded

condi
tions

Califomia

type
only

5
A

system
which
controls
the

sup

ply
of

secondary
air

through
the
emer

gency
air

relief
vilve

io
pfevent
ab

normal

temperature
rise
of
the

cataly

tic

converter

California

type
only

A
I

S

operation
is

as
follows

I

I

t

1
r

9

I
Air

pump
6

Check
valve

I
0
L
2
Air

pump
air
deaner
7
Air

gallery
pipe

3
Air

relief
valve
8
Injection
non
e

r
4
Air
cleaner
9

Exhaust
manifold

5

Carburetor
10

Anti
backflIe
valve

EC179

Fig
EC
22
Non

California
type
A
I
S

EC
12

The
non
California

type
operates
as

follows

secondary
air
is
sucked

through
the
air

pump
air

cleaner
into

the
air

pump
driven

by
the
crank

pulley
It
is

then

discharged
through

the

check

valve
to

the
air

gallety
where

it
is

distributed
to
each

exhaust

porL

The

secondary
air
is
then

injected

from
the

injection
nozzle

into
the

exhaust

port
near
the
exhaust
valve

The
air
relief
valve

opens
only
when

the

discharge
pressure
of
the
air

pump

surpasses
the

spring
force
of
the
air

relief
valve

during
high
speed
opera

tion

When
the
air

relief
valve

opens

the

secondary
air
is

discharged
in
to

the

carburetor
air
c1eaner

The
anti

backfire
valve

opens
when

the
intake
manifold
vacuum

reaches
a

predetermined
value

during
decelera

tion

and

permits
fresh
air
to
now
into

the
intake

manifold
from
the
air

cleaner

f

I

Jl

rn
l

I
Air

pump

2
Air

pump
air

cleaner

3

Emergency
air

relief
valve

4

Air

relief
valve
riu

Qj

j

I

@
Emission
Control

System

To
intake

manifold

The
California

type
includes
in

addition
to
the

components
of
the

non
California

type
an

air

control

valve

and
an

emergency
air
relief
valve

The
air

control
valve

opens
when

the
sum
of
the
air

pump

discharge

pressure
and

the
intake

manifold
vacu

um

applied
to
the

diaphmgm
reaches
a

predetermined
level
and

discharges

the

secondary
air
into
the

air
cleaner

When
the

pressure
becomes
low
the

valve
doses

with
the

spring
force
of

3

5
Air

cleaner

6

Check
valve

7

Air

gallery

pipe

8

Carburetor

EC

13
To

intake

manifold

Air

diSlcharge
to

intake
manifold

Secondary

air

EC297

Fig
EC

23

Operation

of
A

B
lve

the
air
control
valve

and

stops
dis

charging
the

secondary
air

F
igure

EC

25

When
the

intake
manifold

vacuum

applied
to
the

diaphragm
reaches

a

predetermined
level
E
A

R
valve

operates
to

discharge
the

secondary
air

into
the

atmosphere
When
the

pres

sure

becomes

high
the
valve

closes

by

spring
tension
of
E
A
R
valve

and

stops

discharging
the

secondary
air

fl

t

9
Air
control
valve

10

Injection
nozzle

II
Exha
l
t

manifold

12
Anti
backfire
valve

EC780

Fig
EC
24

California

type
A
I

S

9
From
air

pump

l

h
1

Not
actuated

REMOVAL
AND

INSTALLATION

Air
p
mp
sir
cleaner

Remove
air
hose

then
detach
air

cleaner

from

hoodledge
Air
cleaner

element
and
Ii
r
deancr
lower

body
are

built
into
a
unit
construction

Replace

air
cleaner
clcl

nen
and

lower

body
as

an

assembly

J

J

tt
c

t
o

J

EC
323

Fig
EC
26
Replacing
oir
cleaner

element

Air

pum

Remove
air
hoses

from
air

pump

2
Loosen
air

pump
adjusting
bar

mounting
bolts
and
air

pump
mount

ing
bolts
then

remove
air

pump
drive

bell

3
Remove
air

pump
pulley

4
Remove
air

pump
from
bracket

Air
control
valve

California
models

l
Disconnect

air
hoses
and
a
vacu

um
hose
from
air
control
valve

2
Remove
air
con
trol
valve
from

bracket

E
A

R
valve
California
modela

Remove
vacuum

pipe
and
air

hose

and
dismount
E

A
R
valve
Emission
Control

System

o

jJ
To

Intake
mamfold

rF
vacuum

r

To
air

cleaner

From
air

pump

EC781

Fig
EC
27
Locotion

of
E
A
R
wive

Antl
backflravalve

Disconnect
air
hose
and
vacuum

hose
from
anti
backfire
valve

Check
valve

Disconnect
hose
and
remove
check

valve
from
air

gallery
pipe

Air

ganery
pIpe
andinJactlon

nozzles

It
is

very
difficult
to
remove
the
air

gallery
from
the
exhaust
manifold

without

bending
the

pipe
which
could

result
in
fractures
or

leakage
There

fore

removal
of

the
air

gallery
pipe

and

injection
nozzles
should
be
under

taken

only
when

they
are

damaged

I
Lubricate
around
the

connecting

portion
of
air

injection
nozzle
and
air

gallery
with

engine
oil

2
Hold
air

injection
nozzle

hexagon

head
with
a

wrench
and
unfasten
flare

screw

connecting
ait

gallery
to

injec

tion
nozzle
Remove
air

gallery

EC
14
To
intake

manifold

vaCUl
lm

r

Y

4
9
Gf

T

I
To

air
cleaner

I

Actuated

EC299

Fig
EC
25

Operation
of
air
control
value

Notes

a

Apply
engine
011
to
rews
several

times
during
above

work

b
Be
atreful
not
to

damage
other

parts

3
Unfasten
air

injection
nozzle

from

cylinder
head

applying
engine
oil

to
screwed

portion
several
times

4

Check
air

gallery
and
nozzle
for

fractures
or
leakage
Clean
air

injection

nozzle
with
a
wire
brush

5

At
time
of
installation
hold
air

injection
nozzle

hexagon
head
with

a

wrench
and

tighten
air

gallery
flange

screw
to
a

torque
of
5
0
to
5
9

kg
m

36
to
43
ft
lb

6
Check

cylinder
head
air

injection

nozzle
and
air

gallery
for
leaks
with

engine
running

Air

pump
relief
vslve

Loosen
carburetor
air
cleaner

mounting
sc
ews
and

remove
air

pump
relief
valve

InstallatIon

Install
in
the

reverse
order
of
reo

moval

DISASSEMBLY
AND

ASSEMBLY

Disassembly
of
air
pump

1
Remove
four

pulley
drive
bolts

and
remove

pulley
from
hub

2

Secure
air

pump
drive
hub
in

a

vise

as
shewn
in

Figure
EC

28
and

remove
four
end
cover
bolts

Note
Never

clamp
on
the

aluminum

housing

EC302

Fig
EC
28

Removing
cover

3
Remove
end
cover

by
carefully

tapping
around
dowel

pin
with

a

plas

tic
mallet
and
lift

up
straight

4
Put
match
marks
0
on
rotor

ring
and
side
of
rotor
to
ensure
correct

reassembly
and
remove
four
screws

that
retain
rotor

ring
to

rotor

using
a

Hexagonal
Wrench
STl9810000

Notes

a

Generally
match
marks
are
indi

cated
on

both
rotor

ring
and
rotor

by
the
manufacturer

ECll1

Fig
EC
29

Removing
rotor
ring
Emission
Control

System

b
Discard
screws
which
were
re

moved

Always
use
new
ones
when

installing

5

Remove
vane
from
rotor

EC661

Fig
EC

30
Remooing
vanes

6
Remove
four
carbon

shoes
and

two
shoe

springs
from
rotor

using

needle
nose

pliers
or
tweezers

Note
Carbon
shoe
A

0
039
in
wider
than

confuse
them
is
I
mm

B
Do
not

If

replacement
of
front

bearing
is

necessary

proceed
as
follows

7
Remove
air

pump
drive
hub
with

standard

puller

EC
15
8
Remove
four
screws

securing

front

bearing
cover
in

place
and
de

tach

bearing
cover

9

Support
the
rear
end
face
of
air

pump
housing
with
Rotor

Adapter

STl9890000
Drive
rotor
out

by
push

ing
rotor
shaft
with

Bearing
Pressing

Tool
STl9940000

STl9940000

1Ul

STl9890000

I
I

EC303

Fig
EC
32

Removing
rotor

shaft

10

Support
the
front
end
face
of

housing
with

Bearing
Adapter

STl9930000
Attach

Bearing
Driver

STl9910000
to
front

bearing
on
the

inside
of
air

pump
housing
iuid

press

out

ll

I
I

STl9910000

i

L

9930000

J

1

EC304

Fig
EC
33

Remouing
ball

bearing

11

Keep
disassembled

parts
in

rder

Emission
Control

System

Assembl
of
air

pump

I
Front

bearing

Support
the
rear
end
face
of
air

pump
housing
with
RotOL

Adapter

STl9890000
Press
front

bearing
into

place
with
a

press
arid

Bearing
Ptessing

Tool
STl9940000

I
I

STl9940000

X8
03

Fig
EC
35

Pressing
ball

bearing
L

2

Bearing
cover

Torque
four

bearing
cover

securing

bolts
to
0

1
to

0
2

kg
m
0
7

to
1
4

ft
lb

3
Rotor
shaft

Support
the
inward
bottom
of

rotor
with
Rotor
Stand
STl9920000

Press
rotor
into

place
with
a

press

and

Bearing
Drive
STl9910000
until

the

stepped
portion
of
rotor
shaft

touches
front

bearing
inner
race
C
1

ST
19910000

ST19920000

I
EC3Q7

Fig
EC
36

Pressing
rotor
shaft

Notes

a
Be

sure
to
drive
front

bearing
inner

race
in

b
After
rotor
is
installed
in

place

ensure
that
the
rotor
end
is

pos

tioned
below
the
end
face
of
air

pump
housing

Position
of
rotor

end
below
air

pump

housing

0
050

to
0
150
mm

0
0020
to
0
0059
in

4

Air

pump
drive
hub

Support
the
inward
bottom
of

rotor
with
Rotor
Stand
STl9920000

EC
16
EC562

Fig
EC
34

Componenbr
of
two
vane

type

Press
drive
hub
into

place
with
a

pre
and

Bearing
Driver
STI
991
0000

until
the
end

face
of
drive
hub
touches

froE
c
ing
in
n
c

j

STt9910000

STl9920000
e

r

EC308

Fig
EC
37

Pressing
air

pump
drive

hub

5

Carbon
shoe

1
Place
air

pump
drive
hub
in
a

vise

2

Clean
carbon
dust
etc
from

shoe

grooves

3

Align
rotor
with

housing
proper

ly
Refer
to

Figure
EC
38
Then
insert

carbon
shoes
into

place
noting
their

directions

EC540

Fig
EC

38
Install

carbon
shoe

Notes

a

Carbon
shoe
A

is
1
mm
0
039

in

wider
than
B

Do
not
confuse

them

b
If
carbon

shoes
are

exposed
beyond

the
rotor

end
face
remove

carbon

shoes
and
clean
shoe

grooves

Reassemble

carbon
shoes

6

Vane

1
Pack
vane

bearing
with

high

melting
point
grease
MIL
G
3545
A

Esso

ANDOK260
or

equivalent
and

insert

dummy
shaft
into
the

Vane

bearing

STl9900000

EC563

Fig
EC
39
Vane

assembly

2
Install
vane
in

place
on
rotor

using

Dummy
Shaft

STl9900000
as
a

guide

Note
The
vanes

may
require
6
to
16

km
4

to
10

miles
wear
in

running

time
In
the

event
a

slight
squeaking

still

remains
drive
the
car
about
64

to
80
km
h
40
to
50

MPH
In

most

cases
6
to
16

km
4
to

10

miles
will
be
sufficient

for
wear
in

7

Shoe

spring

Place
shoe

springs
in

deeper
groove

of
shoe
Emission
Control

System

i

111

11

EC123

Fig
EC
40

Installing
shoe

spring

Note
When

instaUing
a
shoe

spring

make
sure
that
the
outward
bend

ing
side

faces
in

shoe
and
that
both

ends

of

spring
face
in
the

wall
of

shoe

groove

Be
sure

to

push

spring
in

so
that

spring
end
face
is
flush
with

rotor

8
Rotor

ring

Install

rotor

ring
by
correctly
align

ing
the
rear
end

face
of
rotor

with
the

0
mark

in
rotor

ring
and

tighten

four

screws
to

the

specified

torque

with

Hexagonal
Wrench
ST19810000

Tightening
torque

0
5

to
0
7

kg
m

3
6
to
5
1

ft
lb

5T19810000

EC124

Fig
EC
41

In8talling
rotor

ring

9
Removal
of

dummy
shaft

Carefuny
withdraw

dummy
shaft

from

vane

10

Vane
shaft

Pack

rear

bearing
with

high

melting

point

grease
MIL
G
3545

A

so

ANDOK
260
or

equivalent

Apply
thin

coating
of

grease
to
vane

shaft
and
rotor

ring
and
insert

vane

shaft

into
its

bearing

EC
17
Notes

a

Do
not

apply
an
u
tue
stress

to

vane
shaft
when

inserting

b

If
two
vanes
are
dislocated
when

inserting
vane
shaft

correctly

align

vanes

by
inserting
dummy
shaft

Then
draw
out

dummy
shaft
and

insert
vane

shaft

c
When

wear
occurs
on
vane
shaft

or

when

replacement
of

rear

bearing
is

necessary
replace
rear
cover
as

sembly

Jl
End
cover

Position
end

cover
in

place

Snugly

tighten
the
bolt
close
to

the
dowel

Then

tighten
four
bolts

to
the

speci

fied

torque

Tightening
torque

0

7
to
0

9

kg
m

5

1

t06
5
ft4b

EC302

Fig
EC
42
Insla
ling
end

cover

12

Pulley

Tighten
four

pulley
securing
bolts

to
the

specified
torque

Tightening
torque

0
7
to
0

9

kg
m

5

lt06
5
ft

lb

INSPECTION

Air

InJection
system
hosas

Check
air

system
hoses
for
loose

connections
cracks
or
deterioration

Retighten
or

replace
if

necessary

Air

ystem
manifold

Check
air

gaUery

pipe
and

injection

nozzles
for
loose
connections
and

cracks

Retighten
or

replace
if
neces

sary