PROTECTION AGAINST VIBRATION conditions and that sufficient time for this work is allowed for. Stress caused by vibration in mobile construction machinery is predominantly a result of the way in which it is operated. The following parameters have a particularly significant influence: Travel over longer distances (e.g. on public roads) with adequate (average) speed. For machines which are used primarily for travelling, use special auxiliary systems for the journeys (wherever available), allowing a vibration reduction for this application type. Should these auxiliary systems not be available, regulate the speed so that a "vibrational build-up" of the machine is avoided. Terrain conditions:
Unevenness and potholes; Operational technique: Speed, steering, braking, control of the machines operating elements during travel and during operation. The machine operators themselves are largely responsible for the actual stress caused by vibration as the operators determine speed, gear transmission, manner of handling and travel routes. Thus, a wide range of different forms of vibrational stress are resulted for the same machine type. Vibrational stress of the machine operators body can be reduced by noting the following recommendations: Select the correct machine, equipment and accessories for each respective application.
Use a machine which features a suitable seat (thus, for earthmoving machines, e.g. hydraulic excavators, a seat which complies with EN ISO 7096). Ensure that the seat remains in good condition and adjust the seat as follows: 1. Adjustment of the seat, and thus the vibrations being produced from the seat, should be carried out in relation to the weight and size of the operator 2. Check the vibration absorption and adjustment mechanisms of the seat regularly and ensure that condition of the seat always adheres to the specifications of the seat manufacturer. Check the maintenance condition of the machine, in particular: tyre pressure, brakes, steering, mechanical connections, etc.
Do not carry out steering, braking, acceleration and switching, or move or load the machines working attachment, in jerky movements. Adapt the machine speed to the travel path to reduce vibrational stress: Reduce the speed when negotiating rough terrain; Travel around obstacles and avoid very rough terrain whenever possible. Ensure that the terrain over which the machine is being driven or operated is well maintained: Remove large stones and obstacles; Fill in ditches and holes; Ensure that machines are on-hand for the preparation and upkeep of practical terrain 2.11