DAF CF65, CF75, CF85 Series . Manual — part 948

©

200423

1

Contents

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

7

2

2 Steering gear, general

CONTENTS

Page

Date

1.

SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200423
1.1

Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200423

2.

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200423
2.1

Overview drawing, single circuit system . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200423

2.2

Overview drawing, single-circuit system with slave cylinder . . . . . . . . . . . 2-2 . . . . . 200423

2.3

Overview drawing, dual-circuit system . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 . . . . . 200423

2.4

Overview drawing, dual-circuit system with slave cylinder . . . . . . . . . . . . 2-4 . . . . . 200423

2.5

System description, single-circuit system . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 . . . . . 200423

2.6

System description, single-circuit system with slave cylinder . . . . . . . . . . 2-7 . . . . . 200423

2.7

System description, dual-circuit system. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 . . . . . 200423

2.8

System description, dual-circuit system with slave cylinder . . . . . . . . . . . 2-11 . . . . 200423

3.

INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200423
3.1

Inspection of the steering gear using a pressure gauge . . . . . . . . . . . . . . 3-1 . . . . . 200423

3.2

Inspection of steering gear using the test case . . . . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200423

3.3

Inspection of second circuit of the dual-circuit system. . . . . . . . . . . . . . . . 3-12 . . . . 200423

3.4

Inspection of steering box attachment. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 . . . . 200423

3.5

Inspection of hydraulic centre position . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 . . . . 200423

3.6

Checking fastening of universal joint to steering box input shaft . . . . . . . . 3-14 . . . . 200423

4.

DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200423
4.1

Draining and filling/bleeding the single circuit steering system . . . . . . . . . 4-1 . . . . . 200423

4.2

Draining and filling/bleeding the dual-circuit system . . . . . . . . . . . . . . . . . 4-4 . . . . . 200423

4.3

Draining and filling/bleeding the steering system with EMAS-controlled
trailing axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 . . . . . 200423

STEERING GEAR, GENERAL

2

©

200423

Contents

2

ΧΦ65/75/85 series

7

©

200423

1-1

Safety instructions

STEERING GEAR, GENERAL

ΧΦ65/75/85 series

7

2

1. SAFETY INSTRUCTIONS

1.1 SAFETY INSTRUCTIONS

The steering gear is one of the most important

systems for the safety of the vehicle. That is why

the steering gear should be treated accordingly

during maintenance and repair activities. Always

work in a very clean environment; even the

slightest contamination in the system can cause

faults.

Repair and maintenance work on the steering

gear must only be carried out by experienced

mechanics with sufficient training.

On re-use, thoroughly check the thread of

attachment bolts and nuts.

Tighten all connections to the specified tightening

torques.

Always check line connections for leaks after

tightening.

If the vehicle has been involved in a collision in

which the steering box or other components of

the steering gear have (possibly) been damaged,

the steering box should always be sent to DAF for

inspection or be replaced. This instruction even

applies if no external damage is visible. In the

collision, the steering box may have sustained

internal damage, causing it to be unreliable.

The other (possibly) damaged components of the

steering gear such as the steering and track rods,

steering and track arms, steering bracket, pitman

arm and the attachments of these components

should always be checked for distortions, cracks,

fractures, etc.

If possible, all components should be magnaflux

tested.

Damaged components must always be replaced,

even if in doubt about their condition.

STEERING GEAR, GENERAL

1-2

©

200423

Safety instructions

2

ΧΦ65/75/85 series

7

Components must only be replaced by DAF

components.

Do not take any chances, and replace

components if in doubt.

Welding of steering gear components is

prohibited.

Straightening of steering gear components is

prohibited.

An incorrect pressure point setting will affect the

vehicle's steering characteristics.

Always take a test drive after completing

maintenance or repair work on the steering gear.

During this test drive, be aware that the steering

gear might not function properly.