Whole-body vibrations

Whole-body vibration emissions on construction machinery are affected by a number of factors, such as the working mode, ground conditions, speed, etc.

To a large extent the operator can influence the actual vibration levels, because the operator controls the speed of the machine, its working mode, the travel path, etc.

Therefore, the result can be a range of different vibration levels for the same type of machine.

Guidelines for reducing vibration levels on earthmoving machines

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Q Use the proper type and size of machine, with optional equipment and attachments for the application. Keep the terrain and haul roads in good condition. – Remove any large rocks or obstacles. – Fill any ditches and holes. – Provide equipment and schedule time to maintain terrain conditions. Adjust the machine speed and travel path to minimize the vibration level. – Drive around obstacles and rough terrain conditions. – Reduce the speed when it is necessary to go over rough terrain. Maintain machines according to the manufacturer's recommendations. – Tire pressures. – Brake and steering systems. – Controls, hydraulic system and linkages. Keep the seat maintained and adjusted. – Adjust the seat and suspension for the weight and size of the operator. – Inspect and maintain the seat suspension and adjustment mechanisms. – Use the seat belt and adjust it correctly. Steer, brake, accelerate, shift gears, and move the attachments smoothly. Minimize vibrations for long work cycle or long distance travelling. – Use suspension systems if available. – If no suspension system is available, reduce speed to prevent bouncing. – Transport machines when there are long distances between worksites.

Back pain associated with whole-body vibrations may be caused by other risk factors.

The following guidelines can be effective to minimize risks of back pains: – Adjust the seat and controls to achieve good posture. – Adjust the mirrors to minimize twisted posture. – Provide breaks to reduce long periods of sitting. – Avoid jumping down from the cab or access system. – Minimize repeated handling and lifting of loads. – Maintain reasonable weight and physical condition.