Automatic locking parking brake.

The parking brake is of disk type with an independent circuit from that of the service stop system. It has an automatic lock feature, the locking action being hydraulically controlled (commonly known as negative brake).
The traditional handbrake has been replaced by an electro-hydraulic switch which allows the operator to engage it even with the diesel engine running.
Should the diesel engine not be running the parking brake is still automatically engaged, so there is no risk of operator oversight or accidental operation, which disconnects automatically only on subsequent starting.

Automatic operation
The locking system is engaged automatically as soon as the diesel engine stops.

Total safety
When the vehicle is at a standstill with engine off, the wheels are therefore always automatically locked.