DAF CF65, CF75, CF85 Series . Manual - part 974

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 200423

1-3

General

PIPES/RESERVOIR AND SLAVE CYLINDER

ΧΦ65/75/85 series

7

5

Plastic reservoir
In single-circuit systems, plastic reservoirs are 

applied.

The reservoir (1) is equipped with a screw cap (3) 

and a dipstick (2).

The supply line is connected to line 

connection (7).

The return line is connected to line 

connection (8).

The filter element (6) is kept in place with a plastic 

clamp (4).

If the resistance in the filter is excessive, e.g. 

because of cold oil or a polluted filter, the filter 

element (6) is partly pushed off the seat. This 

causes part of the steering oil to pass along the 

underside of the filter element (6) directly into the 

reservoir. This movement of the filter element (6) 

is possible, because a spring (5) has been fitted 

between the filter element (6) and the plastic 

clamp (4).

3

4

5

6

8

7

1

2

B

A

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PIPES/RESERVOIR AND SLAVE CYLINDER

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©

 200423

General

5

ΧΦ65/75/85 series

7

Steel reservoir
A steel reservoir is used on the dual-circuit 

system and the EMAS controlled trailing axle. In 

the dual-circuit system, two interconnected 

reservoirs are applied.

The reservoir is equipped with a steel lid (4), 

which is closed using a wing nut (2). The lid (4) is 

sealed with a rubber ring (5).

The lid (4) is equipped with a dipstick (3).

A rubber bush (6) is fitted between the lid (4) and 

the filter element (8), which pushes the filter 

element (8) onto the seat of the filter holder (9).

The by-pass valve consists of a clamping disc 

(10) placed under the filter element.

The force which the return oil exerts on the 

clamping disc (10) pushes the disc (10) off the 

seat (11). Part of the steering oil flows directly into 

the reservoir, see the arrow in the drawing.

The line connection (15) is sealed by the sealing 

ring (14).

The two reservoirs are interconnected by an 

overflow line.

S700183

6

5

3

8

15

14

1

10

11

12

9

4

7

13

2

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2-1

Inspection and adjustment

PIPES/RESERVOIR AND SLAVE CYLINDER

ΧΦ65/75/85 series

7

5

2. INSPECTION AND ADJUSTMENT

2.1 INSPECTION OF STEERING OIL LEVEL

1.

Check the steering oil level when the engine 

is not running.

2.

Clean the dipstick and its immediate 

surroundings to prevent any dirt from 

entering the reservoir.

3.

Check the fluid level in the reservoir using 

the dipstick.

4.

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.

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PIPES/RESERVOIR AND SLAVE CYLINDER

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©

 200423

Inspection and adjustment

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ΧΦ65/75/85 series

7

2.2 INSPECTION OF LINES

1.

Condition of the lines

-

Check all lines for tightness and wear. 

Where supply lines are subject to 

negative pressure, it is particularly likely 

that porous lines will give rise to 

problems (air in the system).

-

If in doubt, always replace the line.

2.

Line connections

-

Check every line connection for leaks.

3.

Line route

-

Lines must not be twisted during 

assembly. To facilitate checking this, a 

mark may have been provided on the 

hose (sometimes in the form of text).

-

Lines should not touch other parts (to 

prevent chafing).

-

The course lines follow should not 

include any sharp bends; this applies 

especially to the flexible suction and 

return lines.

-

Lines should not be pinched off by other 

components.