AR42.60-W-0050B | Four-circuit protection valve pressure maintenance function - Checking | 9.12.10 |
MODEL 374, 375, 940, 942, 943, 944, 950, 952, 953, 954, 957, 958
W42.60-1127-11
Test connections for vehicles with single-chamber air drier and constant pressure system
1 Circuit 1 test connection
2 Circuit 2 test connection
3 Circuit 3 test connection
4 Test connection for reservoir pressure/tire filling connection
4.05 4-circuit protection valve (with integrated pressure limiter)
6.12 Single-chamber air drier with integral pressure regulator
W42.60-1128-11
Test connections on vehicles with dual-chamber air drier and constant pressure system
1 Circuit 1 test connection
2 Circuit 2 test connection
3 Test connection for circuit 3
(The compressed air reservoir with test connection circuit 3 can - depending on equipment installed - also be located at a different position)
4 Test connection for reservoir pressure/tire filling connection
4.05 4-circuit protection valve (with integrated pressure limiter)
6.15 Dual-chamber air drier with integral pressure regulator
W42.60-1196-11
Test connections for vehicles with single-chamber air drier and code (BC3) Pressure control system
1 Circuit 1 test connection
2 Circuit 2 test connection
3 Circuit 3 test connection
4 Test connection for reservoir pressure/tire filling connection
4.07 4-circuit protection valve (with integrated pressure limiter for connections 23-28)
6.12 Single-chamber air drier with integral pressure regulator
Modification notes
6.12.10 | Illustration showing Knorr four-circuit protection valve for constant pressure system and for code (BC3) Pressure control system (10 bar), added. | Step 11 |
| Checking | ||
Danger! | Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. | |
1 | Secure vehicle against rolling | ||
2 | Connect test kit | Required connections: Circuit 1 test connection (1) Circuit 2 test connection (2) Circuit 3 test connection (3) | |
| |||
| Dual-chamber air drier with integral pressure regulator modified, added. | Only on vehicles with code (B62) Heated compressed-air drier (dual-chamber system). | |
3 | Start engine and completely inflate air brake system with idle speed | ||
4 | Turn off engine | ||
5 | Switch on ignition | ||
6 | Release parking brake | ||
7 | Check protection pressure for circuit 1 and circuit 2 | ||
Static protection pressure (closing pressure), four-circuit protection valve, circuits 1 and 2 (without replenishment and 0 bar in defective circuit) | |||
| |||
If the determined values deviate from the given specified values: | |||
Replace 4-circuit protection valve. | |||
8 | Start the engine and inflate compressed air system at idle speed, until circuits 1 and 2 reach a reservoir pressure of > 9 bar | ||
9 | Turn off engine | ||
10 | Switch on ignition | ||
11 | Check protection pressure for circuit 3 | ||
Static safety pressure (closing pressure), four-circuit protection valve for circuit 3 and 4 (without replenishment and 0 bar in defective circuit) | |||
| |||
If the determined values deviate from the given specified values: | |||
Replace 4-circuit protection valve. | |||
| Function of four-circuit protection valve modified | ||
12 | Check compressed-air supply in circuit 4 | For example, by raising the driver seat using the controls. | |
13 | Check pressure circuit inflating sequence | ||
| |||
If the determined inflation sequence deviates from the given inflation sequence: | |||
Replace 4-circuit protection valve. | |||
14 | Switch off ignition | ||
15 | Disconnect test kit |
Test and adjustment values for service brake
Number | Designation | Model | Model | ||
BE42.10-N-1008-10B | Static protection pressure (closing pressure), four-circuit protection valve, circuits 1 and 2 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
BE42.10-N-1009-10B | Static safety pressure (closing pressure), four-circuit protection valve for circuit 3 and 4 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
Test and adjustment values for service brake
Number | Designation | Model | Model | ||
BE42.10-N-1008-10B | Static protection pressure (closing pressure), four-circuit protection valve, circuits 1 and 2 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
BE42.10-N-1009-10B | Static safety pressure (closing pressure), four-circuit protection valve for circuit 3 and 4 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
Test and adjustment values for service brake
Number | Designation | Model | ||
BE42.10-N-1008-10B | Static protection pressure (closing pressure), four-circuit protection valve, circuits 1 and 2 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | |
BE42.10-N-1009-10B | Static safety pressure (closing pressure), four-circuit protection valve for circuit 3 and 4 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | |
Test and adjustment values for service brake
Number | Designation | Model | Model | ||
BE42.10-N-1008-10B | Static protection pressure (closing pressure), four-circuit protection valve, circuits 1 and 2 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
BE42.10-N-1009-10B | Static safety pressure (closing pressure), four-circuit protection valve for circuit 3 and 4 (without replenishment and 0 bar in defective circuit) | bar | 4.5 | 4.5 | |
Test kit
360 589 00 21 00