Checking service pressures on four-circuit protection valve

AR42.60-W-0040C

Checking service pressures on four-circuit protection valve

6.8.14

MODEL

934

with CODE CB0 (Integral rear end)

Modification notes

6.8.14

Value changed: Operating pressure of service brake circuit 1 and 2

Step 5

BE42.10-N-1003-10B

6.8.14

Value changed: Operating pressure of auxiliary consumer, circuit 3 and 4

Step 5

BE42.10-N-1004-10B

1

Test connection for circuit 1 (connection 21)

3

Test connection for reservoir pressure/tire filling connection

2

Test connection for circuit 3 (connection 23)

4.05

4-circuit protection valve (with integrated pressure limiter)

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A



Check

1

Connect test kit

 Required test connections:
- Test connection, circuit 1 (1)
- Test connection, circuit 3 (2)
- Test connection for reservoir pressure/tire inflation connection (3).

 Test kit

*360589002100

2

Lower the operating pressure in circuit 3 to approx. 7.5 bar

3

Start the engine and fill the compressed-air system until the pressure regulator cuts out

4

Switch off ignition

5

Check service pressures

Operating pressure of service brake circuits 1 and 2

*BE42.10-N-1003-10B

Operating pressure of auxiliary consumer circuits 3 and 4

*BE42.10-N-1004-10B

If the required specified values are not reached:



Replace 4-circuit protection valve (with integrated pressure limiter) (4.05).

6

Disconnect test kit

Test and adjustment values for service brake

Number

Designation

Model 930, 932, 933, 934, 944, 950, 952, 953, 954, 957

BE42.10-N-1003-10B

Operating pressure of service brake circuits 1 and 2

bar

9,4...10,4

Test and adjustment values for service brake

Number

Designation

Model 930, 932, 933, 934, 944, 950, 952, 953, 954, 957

BE42.10-N-1004-10B

Operating pressure of auxiliary consumer circuits 3 and 4

bar

7,7...8,5