AR42.10-B-0190B | Checking adjuster | 12.02.16 |
Vehicle 688 with Cumbustion engine 374.977, 904.908, 904.924, 904.957, 904.918, 904.919
B42.10-0313-04
1 Cap
2 Hex head bolt of the adjusting mechanism
| Check: | ||
1 | Release the parking brake | Chock the vehicle. | |
Pressurize the pneumatic system. | |||
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 | |||
Equipped with Knorr series SB7000 brake caliper | |||
Equipped with WABCO brake caliper | |||
5 | Remove the box wrench | ||
6 | Install the cover (1) | Make sure the cover is correctly seated. |
Compressed air brake system
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 | |||