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DAF CF65, CF75, CF85 Series . Manual - part 957

200423

4-7

Draining and filling

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

15. Run the engine at idling speed for another

2 minutes. Do not touch the steering wheel

during these 2 minutes.

16. Check the steering oil level when the engine

is not running.

17. Clean the dipstick and its immediate

surroundings so that no dirt can get into the

reservoir.

18. Check the fluid level in the reservoir using

the dipstick.

19. The fluid level should be between the marks

when the steering oil is "cold".

Note:

When the steering oil is at operating temperature,

the level may be above the top mark on the

dipstick.

20. Put the filler cap on the reservoir again and

lower the axle(s).

21. Inspect the line connections for leaks.

22. Attach the propeller shaft.

23. Make a test drive. Now check the steering oil

level and check the line connections for

leaks.

S7 00 676

STEERING GEAR, GENERAL

4-8

200423

Draining and filling

ΧΦ65/75/85 series

4.3 DRAINING AND FILLING/BLEEDING THE STEERING SYSTEM WITH EMAS-

CONTROLLED TRAILING AXLE

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 the steering system with EMAS-
controlled trailing axle
1.

Clean the line connections of the steering

box, reservoir and, if present, the slave

cylinder.

Jack up the front axle.

Place receptacles under the steering box.

Remove the return line from the steering

box.

Remove the filter from the reservoir.

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.

Reinstall the line which was disconnected.

Drain the EMAS system.

Fit a new filter into the reservoir.

Replace the pressure filter in the fluid flow

control valve.

200423

4-9

Draining and filling

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

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. Air in

the fluid flow control valve is

continually audible.

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 the steering system with
EMAS-controlled trailing axle
1.

Remove the fuses of the EMAS system.

The steering gear bleeds automatically. This

bleeding system will only function if there is

circulation pressure in the system.

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.

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.

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.

Top up the steering oil to the upper mark on

the dipstick.

}

STEERING GEAR, GENERAL

4-10

200423

Draining and filling

ΧΦ65/75/85 series

Repeat the actions described in points 4 and

5 until the steering oil level no longer

decreases.

Jack up the front axle until the wheels are

clear of the floor.

Note:

If the wheel deflection limiting valves are

incorrectly set, e.g. because the maximum

wheel deflection is increased, these valves

should be set correct first.

Start the engine and, with the engine

running, slowly turn the steering wheel

(approx. a

∂ turn of the steering wheel per

second) to the left and to the right, until the

maximum wheel deflection is reached.

Continue this until the oil level no longer

decreases.

Watch the steering oil level, especially if the

vehicle is equipped with a slave cylinder.

10. Run the engine at idling speed for another 2

minutes. Do not touch the steering wheel

during these 2 minutes.

11. Check the steering oil level when the engine

is not running.

12. Clean the dipstick and its immediate

surroundings so that no dirt can get into the

reservoir.

13. Check the fluid level in the reservoir using

the dipstick.

14. The fluid level should be between the marks

when the steering oil is "cold".

Note:

When the steering oil is at operating temperature,

the level may be above the top mark on the

dipstick.

15. Fit the fuses to the EMAS system.

16. Fill and bleed the EMAS system as specified.

17. Inspect the line connections for leaks.

18. Make a test drive. Now check the steering oil

level and check the line connections for

leaks.

S7 00 676

Content .. 955 956 957 958 ..