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Boom strength and stability<br />
ALPHA DELTA<br />
The adjustment of boom height is done by<br />
means of a parallelogram controlled by two<br />
rams working in traction.<br />
All axles are bushed and equipped with a<br />
lubricator.<br />
In transport position, the parallelogram is automatically<br />
locked ensuring safety and long life.<br />
The boom has coil spring pendulum<br />
suspension with hydraulic damping.<br />
The centre frame is fitted with an antiyaw<br />
device and a damping device to<br />
avoid the boom movements.<br />
The parallelogram main frame has been<br />
designed to allow higher driving speeds.<br />
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