Liebherr LTM 1070-4.2 - Manual (Page 7)

LTM 1070-4. 2
7
Variable steering concept
Active rear axle steering
The rear axles are electro-hydraulically actively steered depending
on the speed and the steering angle of the front axles.
5 steering programs (P) are preselectable by push button.
• Distinct reduction of the tyre wear
• Improvement of the manoeuvrability
• Stable driving performance also at high speeds
• All 4 axles steerable
High safety standards –
complete know-how from Liebherr
• Centring cylinders for automatic straightening of the rear axles in case of failure
• Two independent hydraulic circuits with wheel driven and engine driven
hydraulic pumps
• Two independent control computers
P1 Road steering
The axles 1 and 2 are mechanically steered
by the steering wheel. The axle 4 is actively
steered depending on the speed and on the
steering angle of the front axle. Above 30 km/h
it will be adjusted to straight driving and fixed.
Axle 3 is none steered for road driving.
P2 All-wheel steering
The axles 3 and 4 are turned by the steering
wheel depending on the steering angle of the
front axle to provide for the smallest turning
radius.
P3 Crab steering
The axles 3 and 4 are turned by the steering
wheel to the same direction as the steering
position of axle 1 and 2.
P4 Reduced swing out
The axles 3 and 4 are turned depending on
the wheel turn of the front axles to minimize
the back swing of the rear of the chassis.
P5 Independent rear axle steering
The axles 1 and 2 are steered by the steering
wheel, the axles 3 and 4 are steered by push
buttons independently from the steering an-
gle of the axles 1 and 2
Centring cylinders at the rear axles
• Automatic straight positioning of
the rear axles in case of failure.