AR42.10-W-0190A | Checking adjuster | 11.1.12 |
MODEL 374, 375, 930, 932, 933, 934, 940, 942, 943, 944, 950, 952, 953, 954, 957, 958.2 /4, 970, 972, 974, 975, 976
with disk brake
W42.10-1255-01
Increase clearance
2 Hexagon adapter
4 Ring wrench
A Counterclockwise (adjuster device)
Reduce clearance
2 Hexagon adapter
4 Ring wrench
B Clockwise direction (adjuster device)
W42.10-1256-01
Modification notes
| Removing | ||
1 | Secure vehicle against rolling | ||
2 | Release parking brake | Reservoir pressure 8 bar. | |
3 | Mount box wrench (4) and adjust adjuster through hexagon adapter (2) in counterclockwise direction (A) | Adjust the adjuster through the 3 audible clicking noises. The clearance is increased. | |
4 | Remove box wrench (4) and fit again with hexagon adapter (2) in offset position | Mount the box wrench (4) so that motion in the clockwise direction (B) is possible. | |
| Checking | ||
5 | Operate brake 5 to 10 times | Partial braking, generate only approx. 2 bar. | |
The slack adjuster is OK when the box wrench (4) is adjusted with each operation in a clockwise (B) direction and the motion of the box wrench (4) is reduced with each operation. | |||
The slack adjuster is defective when the box wrench (4) is not adjusted, when the box wrench (4) is only adjusted for the first operation, when the box wrench (4) is adjusted back and forth for every operation. | |||
If the slack adjuster is defective the brake caliper must be replaced: | |||
SB 5000, SB 6000, SN 6000, SB 7000, SN 7000 disk brakes. | |||
SN 5000 disk brakes. | |||
| Install | ||
6 | Remove box wrench (4) and coat protective cap with grease | ||
Repair materials
Number | Designation | Order number |
BR00.45-Z-1021-06A | Installation grease (white) | Knorr-Bremse AG |