D4 and D6K Track-Type Tractor Sound Information and Vibration Information Caterpillar


Sound Information and Vibration Information
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1.1. Sound Level Information
2.1. Sound Level Information for Machines in Eurasian Economic Union Countries
3.1. "The European Union Physical Agents (Vibration) Directive 2002/44/EC"
4.2. Vibration Data for Track-Type Tractors
5.3. Information Concerning Hand/Arm Vibration Level
6.3. Information Concerning Whole Body Vibration Level
7.3. Guidelines for Reducing Vibration Levels on Earthmoving Equipment
8.1. Sources

Sound Level Information

The declared dynamic operator sound pressure level is 78 dB(A) when "ISO 6396:2008" is used to measure the value for an enclosed cab. The measurements were conducted at 70% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The measurements were conducted with the cab doors and the cab windows closed.

Hearing protection may be needed when the machine is operated with an open operator station for extended periods or in a noisy environment. Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors and windows are open for extended periods or in a noisy environment.

The declared exterior sound power level is 109 dB(A) when the value is measured according to the dynamic test procedures and the conditions that are specified in "ISO 6395:2008". The measurements were conducted at 70% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds.

The declared sound levels listed above include both measurement uncertainty and uncertainty due to production variation.

Sound Level Information for Machines in Eurasian Economic Union Countries

The declared dynamic operator sound pressure level for a standard machine configuration, measured according to the procedures specified in "ISO6396:2008", is 78 dB(A) with a cooling fan speed set at 70% of the maximum value.

The declared sound power level that is labeled on the machine is 109 LWA. The measurement of the sound power level was made according to the test procedures and conditions that are specified in the European Union Directive "2000/14/EC" as amended by "2005/88/EC".

The declared sound levels listed above include both measurement uncertainty and uncertainty due to production variation.

"The European Union Physical Agents (Vibration) Directive 2002/44/EC"

Vibration Data for Track-Type Tractors

Information Concerning Hand/Arm Vibration Level

When the machine is operated according to the intended use, the hand/arm vibration of this machine is below 2.5 m/s2.

Information Concerning Whole Body Vibration Level

This section provides vibration data and a method for estimating the vibration level for track-type tractors.

Note: Vibration levels are influenced by many different parameters. Many items are listed below.

  • Operator training, behavior, mode, and stress

  • Job site organization, preparation, environment, weather, and material

  • Machine type, quality of the seat, quality of the suspension system, attachments, and condition of the equipment

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 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 to obtain the estimated vibration level. For aggressive operations and severe terrain, add the Scenario Factors to the average vibration level 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." 
Machine Type  Typical Operating Activity  Vibration Levels  Scenario Factors 
X axis Y axis  Z axis  X axis  Y axis  Z axis 
Track-Type Tractors  dozing  0,74  0,58  0,70  0,31  0,25  0,31 
ripping 1,25  1,19  1,02  0,40  0,41  0,28 
transfer 0,87  0,80  0,97  0,43  0,40  0,34 

Note: Refer to "ISO/TR 25398 Mechanical Vibration - Guideline" for more information about vibration. This guideline details the assessment of exposure to whole body vibration of ride on operated earthmoving machines. 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 AVSpare suspension seat meets the criteria of "ISO 7096". This testing represents vertical vibration level under severe operating conditions. This seat is tested with the input "spectral class EM6". The seat has a transmissibility factor of “SEAT<0.7”.

The whole body vibration level of the machine varies. There is a range of values. The low value is 0.5 m/s2. The machine meets the short-term level for the design of the seat in "ISO 7096". The value is 1.61 m/s2 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 recommendations of the manufacturer.

    1. Tire pressures

    2. Brake and steering systems

    3. Controls, hydraulic system, and linkages

  3. Keep the terrain in good condition.

    1. Remove any large rocks or obstacles.

    2. Fill any ditches and holes.

    3. Provide machines and schedule time to maintain the conditions of the terrain.

  4. Use a seat that meets "ISO 7096". Keep the seat maintained and adjusted.

    1. Adjust the seat and suspension for the weight and the size of the operator.

    2. Inspect and maintain the seat suspension and adjustment mechanisms.

  5. Perform the following operations smoothly.

    1. Steer

    2. Brake

    3. Accelerate.

    4. Shift the gears.

  6. Move the attachments smoothly.

  7. Adjust the machine speed and the route to minimize the vibration level.

    1. Drive around obstacles and rough terrain.

    2. Slow down when necessary to go over rough terrain.

  8. Minimize vibrations for a long work cycle or a long travel distance.

    1. Use machines that are equipped with suspension systems.

    2. Use the ride control system on Track-Type Tractors.

    3. If no ride control system is available, reduce speed to prevent bounce.

    4. Haul the machines between workplaces.

  9. Less operator comfort may be caused by other risk factors. The following guidelines can be effective to provide better operator comfort:

    1. Adjust the seat and adjust the controls to achieve a good posture.

    2. Adjust the mirrors to minimize a twisted posture.

    3. Provide breaks to reduce long periods of sitting.

    4. Avoid jumping from the cab.

    5. Minimize repeated handling of loads and lifting of loads.

    6. Minimize any shocks and impacts during sports and leisure activities.

Sources

The vibration information and calculation procedure is based on "ISO/TR 25398 Mechanical Vibration - Guideline". This guideline assesses the exposure to whole body vibration of riders on operated earthmoving machines. Harmonized data is measured by international institutes, organizations, and manufacturers.

This literature provides information about assessing the whole body vibration exposure of operators of earthmoving equipment. The method is based on measured vibration emission under real working conditions for all machines.

Check the original directive. This document summarizes part of the content of the applicable law. This document is not meant to substitute the original sources. Other parts of these documents are based on information from the United Kingdom Health and Safety Executive.

Refer to Operation and Maintenance Manual, SEBU8257, "The European Union Physical Agents (Vibration) Directive 2002/44/EC" for more information about vibration.

Consult your local Cat dealer for more information about machine features that minimize vibration levels. Consult your local Cat dealer about safe machine operation.

Use the following web site to find your local dealer:

AVSpare, Inc.
www.cat.com

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