DAF CF65, CF75, CF85 Series . Manual — part 968

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200423

4-17

Removal and installation

STEERING BOX

ΧΦ65/75/85 series

7

3

7.

Check whether the middle tooth of the sector

shaft engages the correct piston teeth, using

the markings on the sector shaft and input

shaft.

8.

Remove the adhesive tape from the groove

teeth.

9.

Fit a new dust seal (6) and apply grease with

the specified DAF specification (melting

point >130

C) to the dust seal that abuts the

steering box.

10. Fit the side cover.

11. Fit the pitman arm.

12. Adjust the pressure point once more. See

'Inspection and adjustment'.

13. Place the steering box on a test bench, if

available, and check for leaks.

14. Install the steering box.

15. Fill and bleed the steering gear.

16. Make a test drive. During the test drive the

proper functioning of the steering gear

should be checked. After the test drive the

system should be checked for leaks.

S7 00 024

STEERING BOX

4-18

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200423

Removal and installation

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ΧΦ65/75/85 series

7

4.7 REMOVAL AND INSTALLATION, PRESSURE-LIMITING VALVE

Removing the pressure-limiting valve
1.

Make sure that no dirt can enter into the

system while the pressure-limiting valve is

removed.

2.

Remove the plug (1) and take the valve (4)

with the spring (3) out of the steering box.

3.

Check the contact surface of the valve (4)

and the contact surface of the valve inside

the steering box.

Do not change the pressure-limiting

valve setting.

Installing the pressure-limiting valve
1.

Fit a new O-ring (2) on the plug (1).

2.

Place the valve (4) with the spring (3) in the

steering box. Install the plug (1) and tighten it

to the specified torque. See 'Technical data'.

3.

Make a test drive. During the test drive the

proper functioning of the steering gear

should be checked. After the test drive the

plug (1) should be checked for leaks.

S7 00 596

1 2 3

4

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200423

1

Contents

STEERING PUMP

ΧΦ65/75/85 series

7

4

4 Steering pump

CONTENTS

Page

Date

1.

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200423
1.1

Overview drawing, steering pump LUK VT72A, VT77 and LF77. . . . . . . . 1-1 . . . . . 200423

1.2

Overview drawing, emergency steering pump. . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200423

1.3

Operation of the steering pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 . . . . . 200423

1.4

Operation of emergency steering pump . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 . . . . . 200423

2.

INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200423
2.1

Inspection, flow control valve LUK VT72A, VT77 and LF77 . . . . . . . . . . . 2-1 . . . . . 200423

2.2

Inspection, flow control valve ZF 7685 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200423

3.

REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200423
3.1

Removal and installation, steering pump LUK VT77 and LF77 . . . . . . . . . 3-1 . . . . . 200423

3.2

Removal and installation, steering pump LUK VT72A. . . . . . . . . . . . . . . . 3-3 . . . . . 200423

3.3

Removal and installation, steering pump ZF 7685 . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200423

3.4

Removal and installation, emergency steering pump . . . . . . . . . . . . . . . . 3-5 . . . . . 200423

STEERING PUMP

2

©

200423

Contents

4

ΧΦ65/75/85 series

7