MERLO P25.6, Instruction Manual, Page: 53 / 232

4 - CONTROLS AND INSTRUMENTS
4 - 23
• FRONT OVERTURN PREVENTION SYSTEM
The front overturn prevention system steps in when the machine is close to its longitudinal stability limit, and locks all
aggravating movements.
While handling a load, the system automatically detects and processes the position of the load being lifted on the carriage, as
well as the percentage stability of your machine. These values are shown on display (D) in the cab in 3 different ways:
- graphic representation of the load being lifted (indicator (219): green - amber - red)
- LED graphic representation (210) (green - amber - red) of the stability conditions of the machine
- number percentage representation (211) of the longitudinal stability limit
Depending on the number value shown in field (211), 3 stability conditions are determined:
• value between 0% and 90% (Fig. 1)
-
machine is stable; no movement lockout
- indicator (219) is green-coloured
- graphic bar (210) has green LEDs on
• value between 90% and 100% (Fig. 2)
-
the machine is close to its longitudinal stability limit; no movement lockout
- load chart indicator (219) is amber-coloured
- graphic bar (210) has amber LEDs on
- activation of intermittent audible warning signal in the cab. The frequency of the signal increases as the load gets closer to
100% (red zone)
• value beyond 100% (Fig. 3)
-
the machine has reached its longitudinal stability limit, and all aggravating movements are locked as a consequence
- warning light (54) on the dashboard is on
- load chart indicator (219) is red-coloured
- graphic bar (210) has a red LED on
- activation of continuous audible warning signal in the cab
To restore safe operating conditions (both indicator (219) and LED graphic bar
(210), first retract the telescopic boom.
If either it's not possible to retract the telescopic boom or this manoeuvre is not
sufficient to restore safe operating conditions for your machine, turn operating
mode selector (6) to the "C" position and hold it in that position. Then proceed
slowly and very cautiously with non-aggravating manoeuvres until safe operating
conditions are restored (both warning light 54 and audible alarm in the cab are
off; both indicator (219) and graphic bar (210) are green-coloured).
WARNING!
Before starting any operation, when the telescopic boom is still close to
the ground, take your machine to its overturn limit to check that the
overturn prevention system and the corresponding indicators work
correctly. Should you find any malfunctioning, do not use your machine
until the fault is repaired.