21
FUNCTIONING OF THE FIRST AND SECOND ARM.
On the Gold Lift 1470 aerial platform there are three arms. The first arm allows reaching the last
two metres working height.
The first and second arm (20 and 21) are connected in parallel. This means that the less loaded
cylinder moves first.
The movement sequence is as follows:
raise
: second arm
Æ
first arm; descend: first arm
Æ
second
arm.
Then there’s one single trajectory both
raising
and descending
.
FUNCTIONING OF THE BASKET LEVELLING.
The basket levelling during the movement of the first arm, the second arm and the jib is mechanic
and follows a parallelogram system.
On the contrary, when moving the third arm, the basket levelling is hydraulic and is made by two
cylinders. The first cylinder is located near the second extension and is moved by the third arm.
The oil pushed by the first cylinder is sent to the second cylinder located under the basket. This is
equipped with a double block valve and two anti-shock valves, to get rid of the overpressures due to
an improper basket levelling.
Summary of Contents for GOLD LIFT 1470
Page 1: ...Technical Course GOLD LIFT 1470 ...
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