General Information - Navistar ProStar+ Operation And Maintenance Manual

Operation

General Information

Safety belts must be worn by the driver and all passengers at
all times. Before adjusting or fastening the safety belt, move
the seat forward or backward and adjust the seat height as
necessary. Sit erect and adjust the seat cushion and seat back
for a comfortable driving position. In the event of a collision,
a correct driving position maximizes the effectiveness of the
safety belt.
134
Tether straps are installed on all suspension-type seats. Tether
straps help secure the seat to the floor and are intended to
restrain the seat and safety belt in case of an accident or
sudden stop. The tethers are not adjustable and do not need
any adjustment.