Wacker Neuson RD 24 Instruction Manual page 77

BA RD24_RD28 en us 06
The machine is equipped with a hydraulic four-wheel drive, which is
driven by a variable displacement pump. The blower output is fed to both
hub motors in the drum. The driving power of the machine is used for the
locomotion according to the surface conditions and the corresponding
drift. If the coefficient of friction between the ground and a drum drops
to the extent that a drum starts slipping, the entire pump oil flow will
empty across the hub motor of the turning drum, thereby substantially
reducing the tractive force of the still-standing hub motor. The switching
on of the four-wheel blocking triggers the automatic division of the oil
flow. Every gear hub motor is now provided with a separate oil flow, which
ensures a constant traction force for each roller drum without pressure
compensation.
The four-wheel blocking can be switched on when driving on difficult
surfaces, as long as both drums are still turning. If the machine is at a
standstill while the drum is still turning, the drive lever [501] should be
placed in the 0 position before the four-wheel blocking is applied. To
drive away, move the drive lever slowly and smoothly until both drums
are driven. Once the machine is driving, the four-wheel blocking can
be switched off again. The all-wheel lock is applied only as long as the
switch [343] is pressed.
When the machine is loaded, the all-wheel lock must be
applied before driving onto the loading ramp.
Operation
N O T E
Driving
77