Presentation
6
Power transmission
The transmission is fully automatic and of the planetary gear
type. It has a torque converter with free-wheeling stator and
automatic direct drive clutch (lockup) in all gears. The machine has
nine forward and three reverse gears.
The dropbox has a differential, which distributes the torque
equally between the front and rear axles, thus reducing tyre and
road wear as well as fuel consumption. The longitudinal differential
is provided with a locking function.
The drive axles are provided with a differential and hub reduction
gears of the planetary gear type. All drive axles have a differential
lock.
Brakes
Service brakes
The machine is provided with dual-circuit, all-hydraulically
controlled wet brakes, with one brake circuit for the tractor unit and
one for the trailer unit. The brake units are fully encased, oil-
cooled, disc brakes with external cooling.
Exhaust retarder / engine retarder
Depending on the setting of certain switches exhaust brake and
engine braking are available to decrease wear of the brakes.
Parking brake
The parking brake is of the spring brake type, which acts on the
propeller shaft. As the differential lock in the dropbox is engaged
at the same time as the parking brake, the latter will act on the two
front axles. The spring brake has a separate compressed-air
circuit for releasing the brake.
Steering system
The steering system is self-compensating, hydro-mechanical and
has a secondary steering function. A ground-dependent pump on
the dropbox allows the steering to function even if the engine
should stop.
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