BS EN 16246:2012 pdf download
BS EN 16246:2012 pdf download.Agricultural machinery— Backhoes – Safety.
Controls, except presence sensors, shall not be located in the access zone, as defined by the manufacturer The operator’s manual shall specify the safe means of access and egress.
5.6 Electrical equipment
Electrical connections shall be suitably protected against unintentional contact and shod circuit from ingress of moisture and debris
Solutions shall be adopted in order to avoid wrong connections between electncal power sources. 5.7 HydraulIcs
5.7.1 General
Components, hoses and other devices conlalning hydraulic fluid shall be designed or protected to avoid fluid projection towards the operator’s work station in case of rupture (e.g. shield or double hoses). Components and lines shall be dimensioned in a way that wtien the hydraulic circuit is activated at the maximum working pressure, failure and excessive temperatures are avoided
The hydraulic system shall be designed to ensure compatibility between the components and with the fluid specified by the manufacturer for the intended operating and environmental conditions. It shall also be provided with filters to avoid contamination of the hydraulic fluid and of a pressu’re.control device.
Where a hydraulic failure results in a hazardous situation e.g. failure of an outrigger leading to instability, the hydraulic cwcuit shall be fitted with automatic locking devices in accordance with 48.3 of EN ISO 4254-1:2009.
5.7.2 Pump
The pump shall guarantee the flow rate and the pressure specified by the manufacturer when activated at the specified speed.
Pumps shall be dimensioned and its speed shall be set in order to ensure safe connections with the different types of tractors, i e. excessive mechanical stresses and excessive flow.rates of the pump shall be avoided,
5.7.3 Fluid reservoir
Hydraulic tanks shall have an adequate capacity In order to let the pump work correctty even when all cylinders are completely extended, and to contain the fluid when all cylinders are retracted.
Devices shall be installed to indicate the level in the hydraulic tank.
The tank shall have an opening to fill It the height of the opening shall not exceed 1 500 mm from the ground or from a working platfomi.
A means of emptying the reservoir shall be provided
5.7.4 Pressure limit valves
Every part of the hydraulic circuit shal be equipped with a pressure limiting valve or another device in order to limit the pressure to 125 % of the maximum foreseen working pressure.
Valves shall be set to avoid uncontrolled movements of parts of the machine.
5.7.5 Hoses and fittings
The bursting pressure of hoses shall be at least four times the maximum worIing pressure.
Hoses and fittings shall be designed or protected in a way that they are not damaged by contact with parts of
the machine
5.7.6 Dimensioning of hydraulic cylinders
Hydraulic cylinders shall be dimensioned for dynamic working pressure with a salety factor of at least 15.
5.7.7 Control of movements
The movement speeds of the loading arms (widuding telescopic extension. if present) and swing pivot should not give rise to unacceptable inertial forces. If necessary, devices to limit the speed of movement shall be provided.
5.8 Stability of the tractor backhoe combination
5.8.1 General
The stability of the combined tractorlbackhoe loader is dependent on the range and capacity of the attachment, the arrangement of the backhoe loader on the tractor together with the type of tractor. Improvements in stability can be achieved by fitting a counterweight or ballasting the front wheels and observing limits to operating conditions. Further guidance for particular operating conditions are given in Annex B.
Each permitted combination tractor and backhoe shall have a suitable margin against overturning. Permitted combinations and instructions for fitting shall be included in the information for use.
5.8.2 Outriggers
5.8.2.1 Bearing surface
At least two outriggers shall be provided with the backhoe unit,
The bearing surfaces of the outriggers shall be adjustable or freely moveable to maintain adequate ground contact in uneven conditions and allow for a lateral slope of 10 in either direction.
The bearing surface of the outrigger shall be designed to limit ground pressure to 400 kPa when the maximum force is applied to the outrigger.
