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
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