
31
WEBM1000 Safety Section (D6T LGP (OEM))
Sound Information and Vibration Information
Table 2
“ISO Reference Table A - Equivalent vibration levels of whole body vibration emission for earthmoving equipment.”
Machine
Type
Ty
pical Operating
Activity
Vibration Levels Scenario Factors
X axis Y axis Z axis X axis Y axis Z axis
Track-Ty pe
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
Table 3
“ISO Reference Table A - Equivalent vibration levels of whole body vibration emission for earthmoving equipment.”
Machine
Type
Ty
pical Operating
Activity
Vibration Levels Scenario Factors
X axis Y axis Z axis X axis Y axis Z axis
Pipelayers
(1)
(1) If equipped
work cycle 0,21 0,23 0,24 0,09 0,11 0,14
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 70
96”. This 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
varie
s. Ther
e 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 1.61 meter per second squared
for this machine.
Guidelines for Reducing Vibration Levels on
Ea
rthm
oving Equipment
Properly adjust machines. Properly maintain
mac
hines. Operate machines smoothly. Maintain the
conditions of the terrain. The following guidelines
can help reduce the whole body vibration level:
1. Us
e the right type and size of machine,
equipme
nt, and attachments.
2. Maintain machines according to the
manu
facturer's recommendations.
a. Tire pressures
b. Brake and stee
ring systems
c. Controls, hydraulic system and linkages
3. Keep the terrain in good condition.
a. Remove an
y large rocks or obstacles.
b. Fill any ditches and holes.
c. Provide machines and schedule time in order
to m
aintain the conditions of the terrain.
4. Use a seat that meets “ISO 7096”. Keep the seat
maintained
and adjusted.
a. Adjust the seat and suspension for the weight
and t
he size of the operator.
b. Inspect and maintain the seat suspension and
adjustme
nt mechanisms.
5. Perform the following operations smoothly.
a. Steer
b. Brake
c. Accelerate.
d. Shift the gears.
6. Move the attachments smoothly.
7. Adjust the machine speed and the route in order
to minimize
the vibration leve
l.
a. Drive around obstacles and rough terrain.