1 Scope
This standard specifies the test conditions and methods, expression of test results and test report for measuring traction performance of agricultural tyres.
This standard is applicable to measuring traction performance of agricultural drive axle tyres for dry farmland.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 1192-1999 Agricultural tyres (neq ISO 4251-1:1992, ISO 4251-2:1992, ISO 4251-4:1992, ISO 4251-5:1992)
GB/T 2979-1999 Series of agricultural tyres (eqv ISO 4251-1:1992, ISO 4251-2:1992, ISO 4251-4:1992, ISO 4251-5:1992)
HG/T 2177 Appearance quality of tyres
3 Test conditions and methods
3.1 Soil conditions
For the purposes of test, typical and uniform soil shall be adopted, of which the surface shall be flat, and the slope, if any, in the test direction shall not exceed 0.5%. The mass fraction of soil moisture content shall be 10%~20%.
The soil hardness is specified as follows:
——800kPa~1,100kPa for harder soil;
——300kPa~600kPa for softer soil.
The ambient temperature during the test shall be 5℃~35℃.
Foreword I
1 Scope
2 Normative references
3 Test conditions and methods
4 Expression of test results
5 Test report
