DAF CF65, CF75, CF85 Series . Manual — part 1127

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3-17

Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ65/65 (II) series

5

3.20 CHECKING THE STEERING GEAR LINES AND CONNECTIONS

1.

Condition of the pipes

-

Check all pipes for tightness and wear.

Where supply pipes are subject to

negative pressure, it is particularly likely

that porous pipes will give rise to

problems (air in the system).

-

If in doubt, always replace the line.

2.

Pipe connections

-

Check every pipe connection for leaks.

3.

Line route

-

Pipes 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).

-

Pipes should not touch other parts (to

prevent chafing).

-

The course pipes follow should not

include any sharp bends; this applies

especially to the flexible suction and

return pipes.

-

Pipes should not be pinched off by other

components.

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-18

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Inspection and adjustment

5

ΧΦ65/65 (II) series

3.21 INSPECTING THE COMPRESSOR LINE

Remain at a safe distance from

rotating and/or moving components.

Note:

If excessive values are measured, the inside of

the air-dryer housing and the silencer on the vent

should first be cleaned. Then repeat the

inspection.

1.

Bring the engine up to operating

temperature.

2.

Build up pressure in the brake system

(pressure regulator must cut out).

3.

When the engine is not running, remove the

safety valve from the compressor line and

replace it with a test nipple.

4.

Connect a pressure gauge (measuring range

0-16 bar) to the test nipple.

5.

Start the engine and run it at maximum

engine speed.

6.

If the pressure regulator has switched off

(cut-off pressure reached, air dryer blown

off) the pressure gauge must show a

pressure lower than 2 bar; if the measured

pressure is higher than the specified reading,

the compressor line must be replaced.

Note:

If the pressure measured is too high, this

indicates that there are excessive carbon

deposits in the compressor line. The cause

could be poor condition of the compressor

(oil consumption).

7.

Run the engine at idling speed.

8.

Bleed the brake system until the cut-in

pressure of the pressure regulator has been

reached and switch off the engine. The

indicator on the pressure gauge should not

drop rapidly. If necessary, check the system

for leaks. Pay special attention to the

compressor line and the compressor.

9.

Fit the safety valve.

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200518

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Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ65/65 (II) series

5

3.22 CHECKING THE BRAKE COMPONENTS AND BRAKE SYSTEM FOR LEAKS

1.

While operating the service brake, check

whether any leaks occur in the brake system.

If the brake system of a vehicle has been

charged to the maximum pressure, it should

generally be possible to drive the vehicle

after a period of 16 hours of uninterrupted

standstill, without having to first charge the

brake system to adequate operating

pressure. This implies a maximum pressure

drop of approx. 0.4 bar per hour at normal

system pressure.

Note:

Always connect auxiliary consumers and

accessories to circuit 4.

3.23 CHECKING THE BRAKE CYLINDER FASTENING

1.

Check that the brake cylinders do not move

during operation of the service brake.

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-20

©

200518

Inspection and adjustment

5

ΧΦ65/65 (II) series

3.24 CHECKING THE BRAKE SHOE THICKNESS AND BRAKE DISC

Version: Knorr SB 7000
1.

Check whether guide bush (4) protrudes

from guide sleeve (6) (C).

If the guide bush (4) is level with the guide

sleeve (6) (see detail A) the brake shoe and

brake disc thicknesses should be checked.

C

1

4

6

R600481

A