DAF CF65, CF75, CF85 Series . Manual — part 955

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200423

3-13

Inspection and adjustment

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

7

2

3.4 INSPECTION OF STEERING BOX ATTACHMENT.

1.

Engine should be at idling speed.

2.

Pull the steering wheel with quick jerks.

3.

The steering box should not move.

3.5 INSPECTION OF HYDRAULIC CENTRE POSITION

1.

Jack up the front axle(s).

2.

Place the pitman arm in the central position.

3.

Engine speed 1200 - 1400 rpm.

4.

The pitman arm should not move by itself.

STEERING GEAR, GENERAL

3-14

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200423

Inspection and adjustment

2

ΧΦ65/75/85 series

7

3.6 CHECKING FASTENING OF UNIVERSAL JOINT TO STEERING BOX INPUT

SHAFT

1.

Check the universal joint for perceptible play.

If perceptible play is detected, the affected

part must be replaced.

2.

Check whether there is any perceptible play

between the spline connection of the

universal joint and the steering box input

shaft. If perceptible play is detected, the

splines on the universal joint and those on

the input shaft must be checked for wear. If

wear is detected, the affected part must be

replaced.

3.

If there is noticeable play but the parts are

not worn, the attachment bolt and nut must

be replaced. Tighten the new locating bolt

with the new self-locking nut to the specified

tightening torque, see 'Technical data'.

S7 00 639

©

200423

4-1

Draining and filling

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

7

2

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING/BLEEDING THE SINGLE CIRCUIT STEERING

SYSTEM

The steering oil should be drained in case of:

-

damage to the main steering pump or

emergency steering pump

-

contamination of the steering oil

-

water in the steering oil

-

serious foaming of the steering oil due to

drawing in of air.

Draining of a single-circuit steering system
1.

Clean the line connections of the steering

box, reservoir and, if present, the slave

cylinder.

2.

Jack up the steerable axle(s).

3.

Place receptacles under the steering box

and, if present, the slave cylinder. Remove

the return line from the steering box and, if

present, the slave cylinder lines.

4.

Remove the filter from the reservoir.

5.

With the engine at a standstill turn the

steering wheel slowly from one end stop to

the other until the oil stops coming out of the

line connection(s).

6.

Reconnect the disconnected line(s).

7.

Fit a new filter into the reservoir.

STEERING GEAR, GENERAL

4-2

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200423

Draining and filling

2

ΧΦ65/75/85 series

7

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.

Make sure that during filling and

bleeding the reservoir always

remains filled with oil so as to

prevent the pump from drawing in air

which would cause foaming in the

oil.

Air in the hydraulic system may

cause serious damage to the

steering pump. Air in the hydraulic

system could cause occasional

"jamming" of the steering gear.

If the hydraulic system contains air,

a squealing sound will be heard

when the steering wheel is turned.

In the case of serious foaming, the

steering oil should be completely

drained. Trace and repair the leak,

after which the system can be filled

again and bled.

Filling/bleeding of a single-circuit steering
system
1.

The steering gear bleeds automatically. This

bleeding system will only function if there is

circulation pressure in the system.

2.

Fill the reservoir to the brim with clean oil

which complies with the specifications. Wait

a little while and then fill the reservoir to the

brim again.

3.

Crank the engine for approx. 2 seconds

using the starter motor. Make sure that the

reservoir remains filled. Stop cranking

immediately if the oil level threatens to

become too low. Top up the steering oil.

4.

Crank the engine for approx. 10 seconds

using the starter motor. Make sure that the

reservoir remains filled. Stop cranking

immediately if the oil level threatens to

become too low.

5.

Top up the steering oil to the upper mark on

the dipstick.

6.

Repeat the actions described in points 4 and

5 until the steering oil level no longer

decreases.

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