Wacker Neuson RD24, Instruction Manual

Page: 87 / 228

Operation
Driving
BA RD24_RD27 en 04 87
All-wheel lock (optional)
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 should be placed in the 0 position before the four-wheel blocking is
applied. To drive away, slowly move the drive lever until both roller drums
are being propelled. Once the machine is driving, the four-wheel blocking
can be switched off again.
N O T E
When the machine is loaded, the all-wheel lock must be
applied before driving onto the loading ramp.
Switching on the all-wheel lock
1 2
Step on the foot switch [1].
a
The all-wheel lock is activated.
a
The activated all-wheel lock is shown by indicator light [2] on the
operator control panel.
N O T E
The all-wheel lock is applied only as long as the switch is
pressed.