USER
MANUAL
HC1151
W
ARNINGS
A.2
7845436-01 11/18
subject to change without notice
A.2 MECHANICAL
HAZARDS
A.2.1 MECHANICAL
RESISTANCE
The main hazards resulting from failure to follow the operating instructions described in the user
manual are listed below:
ENVIRONMENTAL TEMPERATURE
- Weakening of the crane structure
- Hydraulic oil viscosity too low/high
- Hydraulic oil overheating
- Weakening of plastic components
- Degradation of flexible hoses (-40°C
100°C)
INCLINATION OF THE CRANE'S BASE
- Crane rotation not possible
- Overpressure in slewing cylinders
- Overstress in bearing ring
- Overstress in crane structure
- Loss of stability
INCLINATION OF THE CRANE'S BOOMS
When the crane works with the booms in a near-vertical alignment (lifting moment is near zero), the
load limiting device could operate without the expected accuracy due to:
- oscillations / accelerations of the booms
- inclination of the vehicle
- wind
- joint clearances, frictions
This could cause:
- Overstress in crane structure
- Loss of stability
OIL FLOW RATE TO MAIN CONTROL VALVE
- Overstress in crane's structure caused by excessive speed of movement
- Excessive oil temperature
WIND SPEED
- Overstress in crane structure
- Excessive oscillation of the load
- Loss of stability
PRECIPITATION
- Lightening, electric shock
- General malfunctioning of the electric system
USE IN EXPLOSIVE ENVIRONMENTS
- Flammable hydraulic fluid and plastic components
INSTALLATION ON RIGID BASE
- Excessive forces of inertia
USE IN MARINE ENVIRONMENT
- Corrosion of structural components: cylinder rods, pins, winch rope (offshore cranes)
- Excessive forces due to oscillation/inclination (ship-mounted cranes)
