DAF CF65, CF75, CF85 Series . Manual - part 842

11

31

FA

G

A

d

istinction

can

b

e

m

ade

between

three

dif

ferent

situations:

-

rest

position

(normal

position

during

driving).

-

b

leeding

leading

rear

axle

(increased

pressure

on

driving

a

xle).

-

v

entilating

leading

rear

axle

(returned

to

rest).

Operation

o

f

traction

a

ssistance

is

limited

to

a

maximum

time:

90

seconds.

A

further

operation

o

f

traction

a

ssistance

m

ay

only

b

e

s

tarted

after

a

pause

o

f

5

0

s

econds

after

the

end

of

the

p

revious

operation.

By

now

adjusting

a

time

relay

(G095)

to

a

delay

time

of

60

8

s

econds,

the

pause

period

is

fulfilled.

REST

POSITION

When

traction

assistance

s

witch

C

882

is

operated

(connection

between

contacts

5

and

1),

a

voltage

is

applied

to

c

onnection

point

15

of

time

relay

G

095

through

fuse

E062,

wire

1221,

contacts

5-1o

fC

883,

wire

4563.

During

normal

d

riving,

the

traction

a

ssistance

switch

contact

(C709)

is

open.

The

s

witch

is

self-returning.

BLEEDING

L

EADING

REAR

AXLE

Pressing

and

then

releasing

the

traction

assistance

s

witch

a

ctivates

traction

assistance

(bleeding

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

activates

the

solenoid

v

alve

(B084),

thus

bleeding

the

bellows

of

the

leading

rear

axle.

A

s

a

result,

a

greater

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

bleed

valve

(B084)

is

no

longer

activated,

so

that

bleeding

is

no

longer

performed,

but

is

immediately

ventilated

again.

200332

ᓻ

3-126

5

CHANGES IN THE ELECTRICAL SYSTEM

Changes in the electrical system from chassis number 0E608863

CF65/75/85 series

11

31

1358030/25

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

EL001146

4555

4563

1221

1221

1221

4563

1221

4562

4552

4564

4555

1221

4552

4555

1221

4564

4563

4564

1221

G095

87

30

87A

15

31

t=60s

D929

1010

1000

1010

1000

E062

10A

9/401

2

393

4

653

14

393

3

568

12

393

11

568

5

653

6

653

1

653

21

393

E542

12

3

2

1

B084

C883

5

71

0I

G427

3

1

24

5

D900

B24/

593

D529

1

34A

200332

ᓻ

3-127

Changes in the electrical system from chassis number 0E608863

5

CHANGES IN THE ELECTRICAL SYSTEM

CF65/75/85 series

11

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,

wire

121

1.

This

voltage

is

also

on

connection

point

26

of

connector

595

of

D900

(VIC).

If

parking

brake

control

s

witch

F

000

is

closed

(connection

between

contacts

1

and

2),

this

v

oltage

is

also

on

connection

point

B22

o

f

D

814

(UPEC

electronic

unit)

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,

connector

593

of

D900

to

connection

point

1

of

E570

(clutch

-

P

T

O

N10

pneumatic

switch)

(if

p

resent)

and

to

connection

point

3

o

f

relay

G259

(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

and

2),

a

voltage

is

applied

to

c

onnection

point

1

o

f

relay

G

259

and

to

connection

point

1

o

f

B

245

(PT

O

operation

v

alve).

Relay

G

259

is

energised

and,

as

a

result,

a

c

onnection

is

made

between

contacts

3

and

5

o

f

relay

G259.

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

whether

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.

T

he

VIC

then

sends

a

m

essage

to

the

D

IP

and

the

“PT

O

active

”

warning

is

a

ctivated.

If

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

of

time

programmed

in

the

VIC

a

‘message

’

is

sent

to

the

D

IP

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-on

conditions

for

operation

o

f

the

PT

O

is

now

absent.

T

he

VIC

responds

to

this

by

removing

the

voltage

on

connection

point

23,

connector

593.

The

v

oltage

on

relay

G259

is

interrupted

and,

as

a

result,

the

c

oil

is

n

o

longer

energised.

Contacts

5

-

3

open

and,

as

a

result,

the

v

oltage

on

connection

point

1

o

f

B245

is

lost.

T

he

valve

is

n

o

longer

energised

and

the

P

T

O

is

switched

of

f.

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,

wire

1240.

When

this

switch

is

operated

(connection

between

contacts

5

and

1),

voltage

is

applied

to

c

onnection

point

22

of

D900

via

w

ire

5241.

A

v

oltage

is

applied

from

connection

point

46

of

D900

to

connection

point

1

o

f

B

246

(PT

O

operation

v

alve)

through

wire

4595.

This

valve

is

activated

and

the

P

T

O

switches

on.

200332

ᓻ

3-128

5

CHANGES IN THE ELECTRICAL SYSTEM

Changes in the electrical system from chassis number 0E608863

CF65/75/85 series

11

The

V

IC

checks

whether

the

P

T

O

is

actually

switched

on.

This

takes

p

lace

as

follows:

When

the

P

T

O

has

been

switched

on,

F088

is

operated

mechanically

.

C

ontacts

1-2o

fF

0

8

8

close.

Connection

point

1

1

of

the

V

IC

is

now

connected

to

earth.

T

he

VIC

then

sends

a

message

to

the

D

IP

and

the

“PT

O

a

ctive

”

warning

is

a

ctivated.

If

the

P

T

O

does

NOT

switch

on,

F088

is

NOT

operated

and

connection

point

1

1

is

NOT

connected

to

earth.

A

fter

a

period

o

f

time

p

rogrammed

in

the

V

IC

a

‘message

’

is

sent

to

the

D

IP

and

the

“PT

O

fault

”

warning

symbol

is

activated.

V

a

lve

B

246

is

now

no

longer

energised

and

the

P

T

O

is

switched

of

f.

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

th

e

PT

O

2

of

f.

This

interrupts

the

voltage

on

connection

point

22

of

D900.

V

a

lve

B

246

is

no

longer

energised

and

the

P

T

O

is

switched

of

f.

Switch

F088

is

re-opened

(connection

between

contacts

2

and

1

n

o

longer

exists).

The

earth

connection

with

D900

is

interrupted

and

the

light

goes

out.

V

ARIANTS

Location

9

O

ptional

36

Connection

if

there

is

n

o

N

10

PT

O

clutch

switch

present.

21,

24,

32

Connector

626:

only

applicable

o

n

vehicle

type

F

A.

28,

32

Connector

650:

only

applicable

if

the

vehicle

has

an

Allison

gearbox.

200332

ᓻ

3-129

Changes in the electrical system from chassis number 0E608863

5

CHANGES IN THE ELECTRICAL SYSTEM

CF65/75/85 series