Earth-moving machinery — Laboratory evaluation of operator seat vibration

1.1 This document specifies, in accordance with ISO 10326 1:2016, a laboratory method for measuring and evaluating the effectiveness of the seat suspension in reducing the vertical whole-body vibration transmitted to the operator of earth-moving machines at frequencies between 1 Hz and 20 Hz. It also specifies acceptance criteria for application to seats on different machines.

1.2 This document is applicable to operator seats used on earth-moving machines as defined in ISO 6165.

1.3 This document defines the input spectral classes required for the following earth-moving machines. Each class defines a group of machines having similar vibration characteristics:

— rigid-frame dumpers >4 500 kg operating mass;

— articulated-frame dumpers;

— scrapers without axle or frame suspension[1];

— wheeled loaders >4 500 kg operating mass;

— graders;

— wheeled dozers;

— soil compactors;

— backhoe loaders;

— crawler dumpers;

— crawler loaders;

— crawler-dozers ≤50 000 kg operating mass[2];

— compact dumpers ≤4 500 kg operating mass;

— wheeled compact loaders ≤4 500 kg operating mass;

— skid-steer loaders, wheeled ≤4 500 kg and tracked ≤6 000 kg operating mass.

1.4 The following ma