Liebherr LTM 1130-5.1 - Manual (Page 7)

LTM 1130-5 .1
7
Variable steering concept
Active rear-axle steering
The rear axles are actively electro-hydraulically controlled in accordance with
the speed and steering angle of the front axles. Five different steering pro-
grammes (P) can be selected at the touch of a button.
• Much-reduced tyre wear
• Improved manoeuvrability
• Stable driving behaviour even at high speeds
• All five axles can be steered
High safety standards – entire know-how from
Liebherr
• Centring cylinder for automatic straightening of rear axles in case of fault
• Two independent hydraulic circuits with wheel- and engine driven hydraulic
pump
• Two independent control computers
P1 Road steering
Axles 1 and 2 are steered mechanically
using the steering wheel. Axles 3, 4 and 5
are actively steered, depending on speed
and the front axle lock angle. At speeds of
30 km/h and over, axles 3 and 4 are set to
straight-ahead position and locked; at 60
km/h and over, axle 5 is locked in the same
forward position.
P2 All-wheel steering
The axles 3, 4 and 5 are turned depend-
ing of the axle lock of the front axles by the
steering wheel so far that smallest turning
radii are achieved.
P3 Crab steering
Axles 3, 4 and 5 are turned in the same
direction as the wheel lock on axles 1 and 2
using the steering wheel.
P4 Reduced swing out
The axles 3, 4 and 5 are turned depending
on the axle lock of the front axles, so that
the swing out of the chassis rear gets mini-
mized.
P5 Independent rear-axle steering
The axles 1 and 2 are turned by using the
steering wheel; the axles 3, 4 and 5 are
steered by push button independently from
the axle lock of the axles 1 and 2.
Centring cylinder to straighten
rear axles
• Automatic straightening of rear
axles in case of fault