DAF CF65, CF75, CF85 Series . Manual - part 758

31

FA

G

A

d

istinction

can

b

e

m

ade

between

three

dif

ferent

situations:

-

rest

position

(normal

position

w

hen

driving).

-

v

enting

s

teered

leading

rear

axle

(increase

p

ressure

on

driving

a

xle).

-

v

entilating

steered

leading

rear

axle

(return

to

rest).

Operation

o

f

traction

c

ontrol

m

ode

is

limited

to

a

m

aximum

time:

9

0

s

econds.

T

raction

control

m

ode

can

only

b

e

operated

again

a

fter

a

pause

o

f

5

0

s

econds.

By

now

adjusting

a

time

relay

(G095)

to

a

delay

time

of

60

8

s

econds,

the

pause

period

is

fulfilled.

REST

POSITION

When

the

traction

c

ontrol

m

ode

switch

C882

is

operated

(connection

between

contacts

5

-

1),

a

voltage

is

applied

to

c

onnection

point

15

of

time

relay

G

095

through

fuse

E062,

wire

1221,

contacts

5-3

o

f

C

883

and

wire

4563.

During

normal

d

riving,

the

traction

c

ontrol

mode

switch

contact

(C709)

is

open.

The

switch

is

spring-loaded.

VENTING

STEERED

LEADING

REAR

AXLE

Pressing

and

then

releasing

the

traction

control

m

ode

switch

activates

the

traction

control

m

ode

(vents

s

teered

leading

rear

axle).

The

time

relay

(G095)

is

now

switched

on

for

a

period

o

f

6

0

s

econds.

C

ontacts

30

-

8

7

a

re

closed.

V

o

ltage

is

now

applied

from

the

VIC

to

connection

point

1

o

f

BV084.

The

V

IC

will

only

supply

a

voltage

below

the

p

rogrammed

speed.

This

energises

the

solenoid

v

alve

(B084),

v

enting

the

bellows

of

the

s

teered

leading

rear

axle.

A

s

a

result

a

g

reater

load

is

placed

on

the

d

riving

axle

(more

traction).

When

the

6

0

8

s

econds

have

e

lapsed,

the

connection

30

-

8

7

o

f

time

relay

G095

is

broken.

As

a

result,

the

v

oltage

on

valve

B

084

is

also

lost.

There

is

a

s

afety

m

echanism

to

prevent

overload

of

the

a

xle.

The

p

roximity

switch

(E542)

monitors

the

a

xle

load.

When

the

m

aximum

value

is

reached,

the

proximity

s

witch

(E542)

is

activated

and

a

supply

v

oltage

is

applied

to

c

onnection

point

1

of

relay

G

427.

Relay

G

427

is

now

energised

thereby

breaking

c

ontacts

3

-

4

.

T

he

air-vent

valve

(B084)

is

no

longer

activated,

so

that

it

is

no

longer

vented,

but

is

immediately

v

entilated.

0202

ᓻ

2-128

5

ELECTRICAL SYSTEM

Electrical system

series

65/75/85

CF

31

1358030/15

1

23456789

1

0

1

1

1

2

1

3

1

4

1

5

1

6

1

7

1

8

1

9

2

0

2

1

2

2

2

3

2

4

2

5

2

6

2

7

2

8

2

9

3

0

3

1

3

2

3

3

3

4

3

5

3

6

3

7

3

8

3

9

4

0

4

1

4

2

4

3

4

4

4

5

4

6

4

7

4

8

4

9

5

0

5

1

5

2

5

3

EL000534

4555

4563

1221

1221

1221

4563

1221

4562

4552

4564

4555

1221

4552

4555

1221

4564

4563

4564

G095

87

30

87A

15

31

t=60s

D929

1010

1000

1010

1000

E062

10A

9/401

2

652

4

653

14

652

3

568

11

652

11

568

5

653

6

653

1

653

E542

12

3

2

1

B084

C883

5

71

0I

G427

3

1

24

5

D900

24/

593

0202

ᓻ

2-129

5

ELECTRICAL SYSTEM

Electrical system

series

65/75/85

CF

32

PT

O

’REQUEST

’

PT

O

1

(=

SWITCH

ON)

When

the

P

T

O

operation

s

witch

(C750)

is

operated,

a

v

oltage

is

applied

to

c

onnection

point

1

1

of

A068

(engine

speed

application

connector)

and

connection

point

27

of

connector

595

of

D900

(VIC)

through

fuse

E091,

wire

1240,

contacts

5-1o

fs

w

it

c

h

C750

and

wire

4594.

This

means

that

a

’request

’

to

use

the

PT

O

has

been

made.

This

’request

’

is

carried

out

depending

on

the

condition

programmed

in

the

VIC.

A

c

ondition

might

be

that

the

parking

brake

m

ust

b

e

engaged.

In

this

case,

a

voltage

is

applied

to

connection

point

1

o

f

parking

switch

control

switch

F000

through

fuse

E035

and

wire

121

1.

This

voltage

is

also

on

connection

point

1

o

f

c

onnector

596

of

D900

(VIC).

If

parking

brake

c

ontrol

s

witch

F

000

is

closed

(connection

between

contacts

1

-

2

),

this

voltage

is

also

on

connection

point

B22

o

f

D814

(UPEC

electronic

unit)

and

on

connection

point

26

of

connector

595

of

D900

through

wire

3402.

OPERA

T

ION

When

the

’PT

O

request

’

is

carried

out,

the

following

takes

p

lace:

A

v

oltage

is

applied

from

c

onnection

point

23

and

connector

593

of

D900

to

connection

point

1

o

f

E570

(clutch

-

P

T

O

N10

pneumatic

switch)

(if

present)

and

to

connection

point

3

of

relay

G

259

(PT

O-operation

takeover

relay)

(if

present)

through

wire

4596.

When

switch

E570

(clutch

-

P

T

O

N10

s

witch)

is

operated

by

depressing

the

c

lutch

pedal,

(connection

between

contacts

1

-

2),

a

v

oltage

is

applied

to

connection

point

1

o

f

relay

G259

and

to

connection

point

1

o

f

B

245

(PT

O

operation

valve).

R

elay

G259

is

energised

and,

as

a

result,

a

connection

is

made

between

contacts

3-5o

fr

e

la

y

G

259.

Relay

G

259

now

remains

energised

irrespective

of

E570

(this

is

a

’memory

’

function).

B

245

is

also

activated

and

this

switches

the

P

T

O

on.

The

V

IC

checks

that

the

P

T

O

is

actually

switched

on.

This

takes

p

lace

as

follows:

When

the

P

T

O

has

been

switched

on,

F087

is

operated

mechanically

.

C

ontacts

1-2o

fF

0

8

7

close.

Connection

point

14

of

VIC

c

onnector

593

is

now

connected

to

earth.

The

V

IC

then

sends

a

m

essage

to

the

D

IP

and

the

“PT

O

a

ctive

”

warning

is

a

ctivated.

In

the

e

vent

that

the

P

T

O

does

NOT

switch

on,

F087

is

NOT

operated

and

connection

point

14

of

connector

593

is

NOT

connected

to

earth.

A

fter

a

period

o

f

time

p

rogrammed

in

the

V

IC

a

’message

’

is

sent

to

the

DIP

and

the

“PT

O

fault

”

warning

symbol

is

activated.

’CANCEL

’

PT

O

1

(=

SWITCH

OFF)

B

re

a

k

in

gc

o

n

ta

c

ts

5-1o

fC

7

5

0

s

w

it

c

h

e

s

th

e

PT

O

o

ff

.

T

his

interrupts

the

voltage

from

connection

point

27

of

connector

595.

One

o

f

the

s

witch

o

n

c

onditions

for

operation

o

f

the

PT

O

is

now

absent.

T

he

VIC

responds

to

this

by

removing

the

voltage

on

connection

point

23

of

connector

593.

The

v

oltage

on

relay

G259

is

interrupted

and,

as

a

result,

the

c

oil

is

no

longer

energised.

Contacts

5

-

3

open

and,

as

a

result,

the

v

oltage

on

connection

point

1

of

B245

is

lost.

T

he

valve

is

n

o

longer

energised

and

the

P

T

O

is

switched

of

f.

0202

ᓻ

2-130

5

ELECTRICAL SYSTEM

Electrical system

series

65/75/85

CF

SWITCHING

ON

PT

O

2

A

v

oltage

is

applied

to

c

onnection

point

5

o

f

C751

(PT

O

operation

s

witch)

through

fuse

E091

and

wire

1240.

When

this

switch

is

operated

(connection

between

contacts

5

-

1

),

voltage

is

applied

to

c

onnection

point

1

o

f

valve

B

246

(PT

O

operation

v

alve)

through

wire

4595.

This

valve

is

a

ctivated

following

which

the

PT

O

s

witches

on.

When

the

P

T

O

is

switched

on,

F088

(PT

O

gearbox

control

s

witch)

is

operated

mechanically

.

A

voltage

is

now

applied

to

connection

point

1

o

f

D

094

(PT

O

2

(orange)

warning

light)

through

fuse

E091

and

wire

1240.

Connection

point

2

o

f

D

094

is

connected

to

earth

through

switch

F088

(connection

between

contacts

1

-

2

)

and

wire

3668.

D094

is

activated.

SWITCHING

OFF

P

T

O

2

B

re

a

k

in

gc

o

n

ta

c

ts

5-1o

fC

7

5

1

s

w

it

c

h

e

s

o

ff

PT

O

2

.

This

interrupts

the

voltage

on

connection

point

1

o

f

C

751.

V

a

lve

C

751

is

no

longer

energised

and

the

P

T

O

is

switched

of

f.

Switch

F088

is

re-opened

(connection

b

e

tw

e

e

n

c

o

n

ta

c

ts

2-1n

ol

onger

exists).

The

earth

connection

with

D094

is

interrupted

and

the

light

goes

out.

V

ARIANTS

Location

7

O

ption

26

Connection

if

there

is

n

o

N

10

PT

O

clutch

switch

present.

32,

35,

44,

47:

Connector

626:

only

applicable

for

F

A

type

vehicle.

35,

44

Connector

650:

only

applicable

if

the

vehicle

has

an

Allison

gearbox.

0202

ᓻ

2-131

5

ELECTRICAL SYSTEM

Electrical system

series

65/75/85

CF