DAF CF65, CF75, CF85 Series . Manual - part 966

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Removal and installation

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4.4 REMOVAL AND INSTALLATION, INPUT SHAFT SEAL

Removing the input shaft seal
1.

Tilt the cab.

2.

Place the steering box in the central position 

using the markings.

3.

Remove the front plate.

4.

Remove the headlight unit.

5.

Remove the steering shaft from the steering 

box.

6.

Remove the pipes from the steering box.

7.

Remove the two attachment bolts (1) from 

the right-angle transmission (2) and remove 

the right-angle transmission from the 

steering box (8). If the right-angle 

transmission is stuck, it can be tapped off the 

steering box with a plastic mallet.

8.

Remove the coupling sleeve (4).

9.

Remove the circlip (5) located above the 

seal (6).

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10. For a one-circuit steering box, the seal (6) 

should be removed as follows:

-

Close off the delivery-pipe connection 

(P) using a plug.

-

Connect a hydraulic pump, which can 

generate a pressure of approx. 150 bar, 

to the return pipe connection (R).

-

Cover the opening at the steering box 

input shaft to prevent any oil splashes.

-

Using the hydraulic pump, gradually 

increase the pressure until the seal (6) is 

driven from the steering box.

-

Remove the hydraulic pump and the 

plug.

11. For a dual-circuit steering box, the seal (6) 

should be removed as follows:

-

Close off the pipe connections P1, P2, 

R1, C1 and C2 using plugs.

-

Connect a hydraulic pump, which can 

generate a pressure of approx. 150 bar, 

to pipe connection R2.

-

Cover the opening at the steering box 

input shaft to prevent any oil splashes.

-

Using the hydraulic pump, gradually 

increase the pressure until the seal (6) is 

driven from the steering box.

-

Remove the hydraulic pump and the 

plugs.

Installing the input shaft oil seal
1.

Check the oil seal chamber (6) for rough 

edges, grooves and residual seal particles.

2.

Place guide sleeve (A), special tool 

(DAF no. 1240095), on the gearing of the 

input shaft (7) so as not to damage the new 

seal (6).

3.

Grease the inside of the new seal (6) and 

install the seal, with its spring side towards 

the steering box, into the steering box.

4.

Tap the seal (6) carefully into the chamber 

using a plastic mallet and driver (B), special 

tool (DAF no. 1240095).

Check whether the groove for the circlip (5) 

is entirely free.

Make sure that the seal (6) is not fitted into 

the chamber too deeply.

5.

Check that no parts of the seal (6) were left 

behind during its installation. Remove these 

particles, if any.

6.

Install a new circlip (5). Place the lower circlip 

lip into the groove and turn the circlip 

anticlockwise while pushing it slightly into the 

groove.

B

6

A

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7.

Check whether the steering box is still in the 

central position, using the markings.

8.

Check the coupling sleeve (4) gearing and 

slide the coupling sleeve onto the input 

shaft (7).

9.

Fit a new O-ring (3) to the right-angle 

transmission (2).

10. Check that the right-angle transmission is in 

the centre position using the marks and fit 

the right-angle transmission (2) onto the 

steering box (8).

11. Fit the attachment bolts (1) of the right-angle 

transmission (2) and tighten them to the 

specified tightening torque. See 'Technical 

data'.

12. Connect the pipes.

13. Fit the steering shaft to the steering box input 

shaft. The groove (A) in the coupling must be 

aligned with the mark (B) on the input shaft of 

the steering box.

Check that the steering shaft is 

correctly fitted to the input shaft, so 

that the bolt can be fitted in the 

recess (C).

14. Fit the new, original bolt and nut in the 

universal joint.

Tighten the bolt to the specified torque, see 

'Technical data'.

15. Fit the headlight unit.

16. Fit the front plate.

17. Top up steering oil and bleed the system.

18. Now check the steering box and pipe 

connections for leaks.

19. Make a test drive. After the test drive re-

check the steering box and pipe connections 

for leaks.

K1 01 353

A

C 

B 

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4.5 REMOVAL AND INSTALLATION, SECTOR SHAFT OIL SEAL IN THE SIDE 

COVER

Removing the sector shaft oil seal in the side 
cover
1.

Clean the steering box and the surrounding 

area.

2.

Remove the lock nut (2).

3.

Remove the attachment bolts (3) of the side 

cover (4).

4.

Collect the steering oil released from the 

system.

5.

Using a plastic mallet, tap the side cover (4) 

loose and at the same time, turn the 

adjusting screw (1) clockwise. The adjusting 

screw (1) is attached to the sector shaft (8) 

and must be completely unscrewed from the 

side cover (4).

6.

Remove the gasket (6) from the side cover. 

This gasket may not be re-used.

Note:

Work in a clean environment. Prevent dirt 

getting into the needle bearing.

7.

Remove the sector shaft oil seal (7) from the 

side cover with a universal internal puller.

Ensure that when removing the 

sector shaft oil seal, the needle 

bearing (5) is not damaged.

8.

Check the needle bearing for freedom of 

movement and damage after removing the 

sector shaft oil seal.

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