GB/T 8419-2023: Earth-moving machinery - Laboratory evaluation of operator seat vibration

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Scope

1.1 This document specifies the laboratory measurement and evaluation methods for
the efficacy of seat suspension systems in the frequency range of 1 Hz ~ 20 Hz for
reducing vertical whole-body vibration transmitted to earth-moving machinery drivers,
in accordance with ISO 10326-1.2016.This document also specifies the acceptance
criteria for operator seats applicable to various types of machines.
1.2 This document applies to operator seats for earth-moving machinery as defined in
ISO 6165.
1.3 This document specifies the required input spectrum classes for the following earth-
moving machines. Each class group specifies a group of machines with similar
vibration characteristics.
- Rigid frame dump trucks with a working mass > 4500 kg;
- Articulated frame dump trucks;
- Scrapers without axle or frame suspension 1);
- Wheel loaders with a working mass > 4500 kg;
- Motor graders;
- Wheel bulldozers;
- Soil compactors;
- Backhoe loaders;
- Crawler dump trucks;
- Crawler loaders;
- Crawler bulldozers with a working mass ≤ 50000kg 2);
1) For suspended tractor scrapers, a seat without suspension or a seat with a highly damped suspension may be used.
2) For crawler dozers greater than 50000 kg, a seat with a vibration-damping cushion is used to provide the required
performance.

Basic Data

Standard ID	GB/T 8419-2023 (GB/T8419-2023)
Description (Translated English)	Earth-moving machinery - Laboratory evaluation of operator seat vibration
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	P97
Classification of International Standard	53.100
Word Count Estimation	22,244
Date of Issue	2023-09-07
Date of Implementation	2023-09-07
Older Standard (superseded by this standard)	GB/T 8419-2007
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration