320 OPERATION
Trailer Brake Hand Control
DANGER
The trailer hand brake control is not a
parking brake valve and must not be
used as one. This brake is not designed
to hold the vehicle stationary. Failure to
follow these instructions can result in the
unintentional movement of the vehicle
and may cause personal injury or death.
DANGER
DO NOT use the trailer brake hand
control as a parking brake. The brakes
could release and the vehicle could roll,
causing a vehicle accident, personal
injury or death.
The hand control valve for the trailer brakes engages the trailer brakes independently from
the vehicle brakes. The valve can be fully or partially engaged but in any partial position it
will be overridden by a full application of the foot brake valve.
To supply air to the trailer brakes to slow the trailer down, pull the valve handle down. The
farther the handle is pulled down, the more air pressure is applied to the trailer brakes.
Releasing the self-returning handle releases the trailer brakes.