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5.5 Operation of the booms
The booms can be operated when all four outriggers are properly deployed and the chassis of the
access platform is leveled. The green light of the automatic leveling (Figure 5 (5)) will stay constantly
ON when these conditions are met.
The overload control system (4.1.1) will prevent the use of the booms if the safe working load of
230 kg is exceeded.
NOTE! Always lift the lower booms from transport support first before operating other
movements. When lowering the booms, make sure to drive them straight down to
transport supports.
Thanks to the fully hydraulic controls boom movements are very smooth, exact and stepless. Operate
the control levers with ease and without hesitation
– learn to operate the booms precisely.
Platform self levelling system keeps the bottom of the platform level automatically. If the level position
of the platform must be adjusted
– for instance in case the machine has not been used for a long time
and the platform has tilted
– operate the control lever of platform self levelling carefully, especially
when the booms are up.
5.5.1 Automatic slewing stop function
Leguan 190 has an automatic boom rotation (slewing) stop function when returning to transport
position. The stop function is activated when the upper boom (2
nd
boom) is lowered close to transport
position and the telescope boom is pulled almost completely in.
When you are slewing towards the center position, the stop function will stop the slewing for one
second once you reach the center position. When the slewing is stopped, you will hear a sound alarm
- a continuous beep.
The stop function works together with the boom center position indicator (4.1.5., p. 18): the boom
center position indicator lights up simultaneously as the stop function is activated.
5.5.2 Dead man switch, boom use (option)
If the access platform is equipped with a dead man switch it needs to be activated before operating
the boom movements.
On the platform the dead man switch is activated by pressing the foot pedal and keeping it pressed
down while controlling the boom movements.
While using the lower controls the dead man switch on lower controls panel (Figure 6, (8)) must be
kept turned counterclockwise.
