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| Safety Section |
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| Sound Information and Vibration Information |
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• | Job site organization, preparation, environment, |
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| weather, and material |
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• | Machine type, quality of the seat, quality of the |
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| suspension system, attachments, and condition of |
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| the equipment |
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It is not possible to get precise vibration levels for this machine. The expected vibration levels can be estimated with the information in Table 1 in order to calculate the daily vibration exposure. A simple evaluation of the machine application can be used.
Estimate the vibration levels for the three vibration directions. For typical operating conditions, use the average vibration levels as the estimated level. With an experienced operator and smooth terrain, subtract the Scenario Factors from the average vibration level in order to obtain the estimated vibration level. For aggressive operations and severe terrain, add the Scenario Factors to the average vibration level in order to obtain the estimated vibration level.
Note: All vibration levels are in meter per second squared.
Table 1
“ISO Reference Table A - Equivalent vibration levels of whole body vibration emission for earthmoving equipment.”
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| Typical Operating | Vibration Levels | Scenario Factors | |||||
Machine Family | Machine Type | X | Y | Z | X | Y | Z | ||
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| axis | axis | axis | axis | axis | axis | |
Scraper | Wheel Scraper | work cycle | 1,05 | 1,18 | 1,12 | 0,34 | 0,40 | 0,42 | |
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Note: Refer to “ISO/TR 25398 Mechanical Vibration - Guideline for the assessment of exposure to whole body vibration of ride on operated earthmoving machines” for more information about vibration. This publication uses data that is measured
by international institutes, organizations and manufacturers. This document provides information about the whole body exposure of operators of earthmoving equipment. Refer to Operation and Maintenance Manual, SEBU8257, “The European Union Physical Agents (Vibration) Directive 2002/44/EC” for more information about machine vibration levels.
The Caterpillar suspension seat meets the criteria of “ISO 7096”. This represents vertical vibration level under severe operating conditions. This seat is tested with the input “spectral class EM2”. The seat has a transmissibility factor of “SEAT<1.0”.
The whole body vibration level of the machine varies. There is a range of values. The low value is 0.5 meter per second squared. The machine meets the short term level for the design of the seat in “ISO 7096”. The value is 1.34 meter per second squared for this machine.
Guidelines for Reducing Vibration Levels on Earthmoving Equipment
Properly adjust machines. Properly maintain machines. Operate machines smoothly. Maintain the conditions of the terrain. The following guidelines can help reduce the whole body vibration level:
1.Use the right type and size of machine, equipment, and attachments.
2.Maintain machines according to the manufacturer's recommendations.
a.Tire pressures
b.Brake and steering systems
c.Controls, hydraulic system and linkages
3.Keep the terrain in good condition.
a.Remove any large rocks or obstacles.
b.Fill any ditches and holes.
