Driving modes and rigging for on-road driving
6.2 Rigging work for driving with a trailer
Operating manual GMK 6400 3 112 993 en 6 - 9
12.07.2013
6.2.3 Switching on boom pre-tensioning
If the main boom has been set down on a trailer, you can change the axle
loads on the rear axle lines by switching on the boom pre-tensioning.
• Switch on the boom floating position;
à p. 6 - 8
The valves
II and III are under the pressure
gauge (1)
• Close the valve II – the lever (2) is horizontal
• Open the valve III – the lever (3) points
upward
You can now fill the pressure accumulator.
• Press button (4) up.
The pressure accumulator is filled
• Fill up the pressure accumulator until the
pressure stops rising on the pressure
gauge (1)
• Close the valve III – lever (3) points down
The valve
II stays closed – lever (2) is horizon-
tal.
Now the boom pre-tensioning is switched on.
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