SK1265-AT6
Steering system
Truck
12-2
SPIERINGS MOBILE CRANES USER MANUAL V 2.9
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12.1.1.
On-the-road mode
In the on-the-road mode the front axles 1, 2 and 3 are mechanically steered, while axles 5 and 6 are
steering in the opposite direction (up to 50 kph (31 mph)). This causes a smaller turning circle.
12.1.2.
Off-the-road mode
The off-the-road mode provides the possibility for using 4 different steering programs.
A steering program can be chosen by means of the
control panel steering system
(see
§ 3.9.6. Control panel steering system
The steering programs distinguish from each other by the difference in steering characteristics of the
rear axle:
1. Small turning circle:
In this steering program, an extra small turning circle is possible;
2. Manual:
In this steering program, the position of the rear axle(s) is manually adjusted;
3. Crab steering:
In this steering program, all axles are steered in the same direction;
4. Wall steering:
In this steering program, it is possible to drive away from an obstacle with a minimum swing
of the rear of the truck.
In the off-the-road mode, the vehicle speed is limited to 15 kph (9.4 mph).
In
§ 4.13.5. Manoeuvring: Steering system
the steering programs are extensively described.
12.2.
Steering mechanisms
In this section, the used steering mechanism per axle is described (see
).
A distinction is made in the following mechanisms:
•
Mechanical:
The rotating movement of the steering wheel is activated in the steering box and transposed
into the mechanical movement of the steering rods. These rods operate the steering arms of
the axles 1, 2 and 3;
•
Hydraulic:
Axles 5 and 6 are hydraulically steered by means of a valve block and a main steering
cylinder;
•
Retracted axle:
After choosing a steering program, this axle is placed in the height position.
If the axle is fully retracted, a buzzer will shortly sound.
•
Non-steering axle:
Concerns a non-steering axle.