DAF LF45, LF55 Series. Manual — part 658
©
200515
5-5
Draining and filling
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΛΦ45/55 series
5
5.4 DRAINING AND FILLING, RAS-EC STEERING CIRCUIT
Drained steering oil must not be re-
used. Store this hydraulic oil
separately from the other drained
oils and have the oil collected by a
waste-removal company authorised
to do so.
Draining the RAS-EC steering circuit
1.
Jack up the trailing axle and support the axle
on stands.
2.
Place suitable catch pans under the high-
pressure filter (1), the steering cylinder (2)
and the valve block (3).
3.
Clean the steering oil reservoir and the
surrounding area.
4.
Remove the filter element from the steering
oil reservoir.
5.
Clean the housing and the surrounding area
of the high-pressure filter. Remove the high-
pressure filter.
6.
Mark the position of the pipes on the
damping valves (1) and remove the pipes
from the damping valves.
7.
Mark the position of the damping valves, if
necessary, and remove the damping valves.
8.
Slowly turn the trailing axle manually several
times, until the steering oil gently comes out
of the steering cylinder.
9.
Check the sealing rings of the damping
valves for damage and wear. Replace them
if necessary.
}
S7 00 801
1
3
2
S7 00 800
B
25 bar
A
33 bar
A
B
1
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
5-6
©
200515
Draining and filling
5
ΛΦ45/55 series
10. Correctly position the damping valves on the
steering cylinder.
Note:
The mixing up of damping valves must be
avoided under all circumstances. The mixing
up of damping valves has a negative impact
on vehicle handling.
11. Fit the pipes to the damping valves
according to the relevant marks.
12. Fit a new high-pressure filter, see chapter
"Removal and installation".
13. Insert a new filter element in the steering oil
reservoir, see chapter "Removal and
installation".
Filling the RAS-EC steering circuit
1.
Fill the steering oil reservoir with the
specified steering oil.
2.
Start the engine, run it at idling speed and
continuously top up the steering oil reservoir.
Note:
The steering oil level should not drop below
the minimum level. However, if the steering
oil level is below the minimum level, it may
well be that the steering pump draws in air
only. This may cause additional foaming.
3.
Bleed the RAS-EC steering circuit.
©
200515
5-7
Draining and filling
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΛΦ45/55 series
5
5.5 BLEEDING THE RAS-EC STEERING CIRCUIT
Bleeding the RAS-EC steering circuit
1.
Gently turn the steering wheel in both
directions, if the level in the reservoir hardly
drops, if at all.
Note:
It is possible that the system fails at the
slightest steering movement. The yellow
warning will be displayed on the DIP and the
trailing axle will no longer steer. In the case
of a failure, switch the vehicle ignition off and
on again.
Note:
The foam that develops during bleeding will
have disappeared after the test drive.
2.
Check the steering oil level and run the
engine at idling speed for a couple of
minutes.
3.
Gently turn the steering wheel in both
directions and check the oil level. Top up, if
necessary.
4.
Make a test run and check the steering oil
level. Top up, if necessary.
Drive and chassis
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
5-8
©
200515
Draining and filling
5
ΛΦ45/55 series
5.6 DRAINING AND FILLING, DIFFERENTIAL
To prevent skin injury, avoid
unnecessary contact with the
drained oil.
Draining the differential
1.
Position the vehicle on a level surface.
2.
Place a suitable tray beneath the differential
to collect the oil.
3.
Remove the drain plug (1) and the level
check/filler plug (2). Drain the oil.
4.
Apply sealant to the thread of the drain
plug (1). Fit the drain plug (1).
Filling the differential
1.
Fill the differential gear via the level check/
filler plug (2) with the specified, correct
quantity of oil. See "Technical data".
2.
Check the oil level after approx. 5 minutes;
it should reach up to the level check/filler
plug (2). If necessary, top up.
3.
Apply sealant to the thread of the level
check/filler plug (2). Fit the level check/filler
plug (2).
Draining the 1132 axle differential
1.
Position the vehicle on a level surface.
2.
Remove the level check/filler plug (A) and
drain plug (B). Drain the oil.
3.
Fit the plug using the special Torx wrench
(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".
Filling the 1132 axle differential
1.
Fill the differential gear through the level
check/filler plug (A) with the specified
quantity of oil; see "Technical data".
2.
Check the oil level after 5 minutes, it must
reach the edge of the level check/filling
opening.
3.
Fit the level check/filler plug (A) using the
special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".
}
1
2
A8 00 370
M8013
A
B
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