Checking adjuster

AR42.10-B-0190B

Checking adjuster

12.02.16



Check:

1

Release the parking brake

Chock the vehicle.

Pressurize the pneumatic system.

*BE42.60-B-1001-01A

2

Remove cover (1).

3

Turn the hex screw of the adjusting mechanism (2) 1/2 of one turn clockwise (right).

Do not cause exaggerated efforts on the adjusting mechanism hex (2). Do not use an open end wrench.

After fitting the box wrench on the adjusting mechanism hexagon, make sure there is enough space for the wrench to be turned during the mechanism operating test.

4

Actuate the brake 5 times with 1 bar

In an adequate adjustment, the wrench has to move measuredly counterclockwise (arrow). With the automatic regulation adjustment, the wrench's angular movement will be progressively reduced.

If the wrench, solidary with the adjusting mechanism, does not move; or if it only moves at the first brake actuation or still, moves back and forth, at each actuation, replace the brake caliper:



Equipped with Knorr series SN7000 brake caliper

AR42.10-B-0090A

Equipped with Knorr series SB7000 brake caliper

AR42.10-B-0090C

Equipped with WABCO brake caliper

AR42.10-B-0090B

5

Remove the box wrench

6

Install the cover (1)

Make sure the cover is correctly seated.

Número

Denominação

chassis 364, 384.07/08/09, 386, 388, 397, 660, 664, 682, 688

BE42.60-B-1001-01A

Pressure regulator

Opening pressure - Wabco/Knorr

bar

7,9 ... 8,3

Closing pressure - Wabco/Knorr

bar

6,9 ... 7,7

Service pressure - Wabco/Knorr

bar

12

Opening pressure of safety valve - Wabco/Knorr

bar

12,0 ... 15,0

Tires filling safety valve opening pressure - Wabco

bar

9,0 ... 13,0

Admissible leakage - Wabco/Knorr

bar (smaller or equal cm3)

10

Pressure in the test bench feeding circuit - Wabco/Knorr

bar

10

Pressure applied to the port 1 for tightness test - Wabco/Knorr

bar

7

Pressure applied to the port 21 for tightness test - Wabco/Knorr

bar

7