AIR SYSTEM (CONT)
The valve (16.1) enables fast entry and escape of
air in the trailer brake system and maintains the
The vehicle is equipped with a brake system which
control pressure in the case of leakage in the
permits compressed air supply from the towing
trailer brake line.
vehicle, i.e., the system can be pressurized with
supply air and braked from a towing vehicle,
When the safety valve (33.2a) is actuated, supply
making it possible to maintain almost the same
air also flows to the changeover valve (33.1) on
operating conditions as in the case of an intact
the brake booster.
This valve has the task of disconnecting the outer
In this case, supply air flows via the front
chamber of the brake booster (27.7) as already
connection (35.0) to the large air tank; in this way,
the auxiliary loads are also supplied.
The reduction of the power assistance causes an
Control air flows to the brake valve (A) via the
improvement in braking characteristics during
coupling head (35.1). The shuttle valve (28.3) is
reversed by connection (2). In this way, the brake
booster (27.7) is actuated via connection (4), i.e.,
The antijackknife brake valve (15.1) is an
only the outer booster chamber is effective.
additional service brake valve which only acts on
the trailer. Its function can be graduated and is
used particularly for braking the trailer on slight
inclines, with the service brake in the tractor unit
not being used along side this brake.
The parking brake in the tractor vehicle acts
mechanically on the rear wheels and has no effect
on the trailer.
When a vehicle with trailer is parked, both the
vehicle and the trailer must be braked by means of
its own parking brake.