HYDROSTATIC FREEWHEELING, CLOSED
LOOP
HYDROSTATIC FREEWHEELING FOR 2-
SPEED BBC
A
B
C2
C1
0,5 bar
Figure 38. Motor with hydrostatic free-
wheeling and external freewheeling valve
(closed loop).
Min.
3 bar
A
B
C2
Y1
C1
*
Figure 39. 2-speed BBC motor with hydro-
static freewheeling and external free-
wheeling valve in open loop system. Maxi-
mum case drain pressure 2 bar.
Hydraulic fluid
Motors in parallel or series circuit
The traction of a vehicle may be increased by connecting multiple motors in parallel
or in series.
A single powered wheel may transmit only a certain amount of power to traction. By
dividing the power to multiple wheels, the vehicle gets more traction. This is
advantageous especially in slippery operating conditions.
4.4
4.4.1
System Design
Product Manual
39
Содержание BB 4
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