Test Point 4

Test point 4
Checking the locking torque (friction coefficients) of the longitudinal and transverse locks

In the event of functional problems or irregularities, perform or verify test points 1, 2 and 3 before the locking torque (locking torque in relation to pressure).

This means:
- No fault stored in the control unit fault memory t
- Perfect bleeding condition of the lock control
- Thickness of the disk assemblies ok (wear assessment)

If the friction coefficient curves deviate from the setpoint in the locking torque test, the lock is not functioning optimally. Only a large deviation of the actual value from the setpoint is stored as a system deviation in the control unit fault memory.

When performing the locking torque test, check the pre-pressure valves in the lock hydraulics (lock actuation system) as well (test point 5).