Checking electric pressure regulator unit

AR42.20-D-0002B

Checking electric pressure regulator unit

19.1.10



Checking

1

Bleed parking brake system

2

Connect test kit to test connection (H1) at compressed air reservoir V3 (C2)



*360589002100

3

Fill parking brake system with compressed air until pressure regulator switches off

 Compare cutoff pressure measured at test connection (H1) with specified value. If the measured cutoff pressure and specified pressure are different:

*BE42.10-N-1018-10A

Install new pressure switch B130 (E2).

*BA42.20-N-1012-01A



*360589002100

4

Lower the reservoir pressure of the parking brake system until the cut-in pressure of the pressure regulator is reached.

 Compare cut-in pressure measured at test connection (H1) with specified value. If the cut-in pressure and specified value are different:

*BE42.10-N-1017-10A

Install new pressure switch B130 (E2).

*BA42.20-N-1012-01A



*360589002100

5

Check control range of pressure regulator between cut-in and cutoff pressure

 Compare difference in pressure measured between cut-in and cutoff pressure with specified value. If the difference between the cut-in and cutoff pressure and specified value are different:

*BE42.10-N-1004-10A

Install new pressure switch B130 (E2).

*BA42.20-N-1012-01A



*360589002100

6

Remove test kit from test connection (H1) between check valve (F) and compressed air reservoir V3 (C2)



*360589002100

Number

Designation

Model 905

BA42.20-N-1012-01A

Pressure switch (B130) on pressure limiting valve T-piece

Nm

15

Number

Designation

Model 905

Model Series 905 up to
R 465741

Model Series 905 from
R 465742

BE42.10-N-1004-10A

Switching range

bar

10.6 to 12.5

-

-

BE42.10-N-1017-10A

Activation pressure standby indicator lamp "(!)" Pressure switchB130

bar

-

-

11,0 (-0,4)

BE42.10-N-1018-10A

Deactivation pressure electric air compressor pressure switch B130

bar

-

-

12,5 (-0,4)