9-10 OM ET18/20/24 us 1.3 * et18_20_24t900.fm
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Directives on reduction of vibration values in earth moving
machines:
• Perform correct adjustments and maintenance on or with 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.
- Tire 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 operator’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 the attachments smoothly without any jerks.
• Adapt your speed and the itinerary to minimize vibration:
- Travel around obstacles and uneven ground.
- Reduce your speed when traveling across rough terrain.
• Reduce vibration to a minimum during long work cycles or when
traveling over long distances:
- Use a machine with a suspension system (seat, for example).
- Enable the hydraulic oscillation damping if the machine is equipped
with tracks.
- If the machine is not equipped with hydraulic oscillation damping,
reduce your speed to avoid bumps and jolts.
- Load the machine on a truck or trailer to move between job sites.
• Other risk factors can affect travel comfort negatively. The following
measures can improve travel comfort:
- Adjust the seat and the control elements to a relaxed body posture.
- Adjust the rearview mirrors to ensure optimal visibility so you can
adopt an upright seating position.
- Provide breaks to avoid sitting for long periods.
- Do not jump off the cab.
- Picking up and raising loads repeatedly must be limited to a
minimum.
Reference:
The vibration values and calculations are based on the indications made
in ISO/TR 25398 Mechanical Vibrations – Guidelines for assessment of
exposure to whole-body vibration when operating earth moving machines.
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