BA 50Z3/6003 en – Edition 4.3 * 5003b610.fm 6-7
Specifications
The degree of vibration is influenced by various parameters.
Some of them are listed below:
• Driver: training, behaviour, working method and strain.
• Work site: organization, preparation, surroundings, weather conditions and material.
• Machine: version, seat quality, quality of suspension system, attachments and
condition of attachments.
Precise indications on the vibration degrees cannot be made for the machine.
Determination of vibration level for the three vibration axes.
• Under typical operating conditions, use the average vibration values measured.
• In order to obtain the estimated vibration value for an experienced driver on level
ground, subtract the factors from the average vibration value.
• In case of an aggressive working method or difficult terrain, add the environmental
factors to the average vibration level in order to obtain the estimated vibration level.
Note:
For further vibration indications, refer to the indications in ISO/TR 25398 Mechanical
Vibrations – Directive on Estimation of whole-body vibration when driving earth moving
machines. This publication uses measuring values of international institutes, organizations
and manufacturers. It contains information on whole-body vibration for drivers in earth
moving machines. For more information on the vibration values of the machine, refer to
Directive 2002/44/EC of European Parliament and Coucil on minimum health and safety
requirements regarding exposure of workers to risks arising from physical agents (vibra-
tion).
It explains the values for vertical vibration under heavy operating conditions.
Directives on reduction of vibration values in earth moving machines:
• Perform correct adjustments and maintenance work on the machine.
• Avoid jerky movements during machine operation.
• Keep slopes in a perfect condition.
Whole-body vibration can be reduced with the following guidelines:
• Use a machine and equipment of correct type and size.
• Follow the manufacturer’s recommendations for maintenance.
• Tyre pressure.
• Brake and steering systems.
• Control elements, hydraulic system and linkage.
• Keep the work area in good condition:
• Remove large rocks or obstacles.
• Fill up ditches and holes.
• Provide a machine and enough time to keep the work area in good condition.
• Use a seat according to the ISO 7096 requirements. Keep the seat in good condition
and adjust it correctly:
• Adjust the seat and suspension to the driver’s weight and size.
• Check and maintain the seat adjustment and suspension.
• Perform the following activities smoothly without any jerks:
• Steering
•Braking
• Acceleration
• Shifting gears
• Move attachments without any jerks.
• Adapt your speed and the itinerary to minimize vibration:
• Travel around obstacles and uneven ground.
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