What should happen to any brake beyond the readjustment limit?

The correct action in the case of a brake that has exceeded the readjustment limit is to reject it. This decision is critical because brakes are essential for the safe operation of any commercial vehicle. When a brake surpasses the readjustment limit, it indicates that it is no longer functioning effectively within safe parameters. Rejection ensures that the vehicle does not continue to operate with potentially dangerous braking issues, which could lead to accidents or failures during operation.

Rejecting the brake means that it requires significant attention, possibly a complete overhaul or replacement, rather than just a simple adjustment or minor repairs. Other choices, such as repair or re-adjustment, imply that the brake could still be viable, which is not the case once it exceeds the set limits. Thus, ensuring that safety protocols are strictly followed is paramount in this situation.