GB/T 21962-2020Corn combine harvester (English PDF)

3 Terms and definitions

4 Product types, model designations and basic parameters

5 Safety requirements

6 Main performance indicators

7 Technical requirements

8 Test methods

9 Inspection rules

10 Marking, transport and storage

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 21962-2008 "Technical requirements for maize combine harvester" and GB/T 21961-2008 "Test methods for maize combine harvester".

Compared with GB/T 21962-2008, the main technical changes are as follows: the scope has been revised (see Clause 1, Clause 1 of the 2008 edition); the normative references have been revised (see Clause 2, Clause 2 of the 2008 edition); product types, models and basic parameters have been added (see Clause 4); a requirement for a safe starting device has been added (see 5.8); the braking performance requirements have been revised (see 5.9, 4.8 of the 2008 edition); requirements relating to corn and straw harvesters, fresh corn harvesters and seed corn harvesters have been added (see 6.1); the main performance indexes have been revised (see Table 1, Table 1 of the 2008 edition); the requirements for the complete machine have been improved (see 7.1, Clause 5 of the 2008 edition); the diesel engine starting requirements have been revised (see 7.2.1.2, 5.4 of the 2008 edition); requirements for the rated power and the emission limits of the diesel engine have been added (see 7.2.1.3, 7.2.1.4); technical requirements for the corn header have been added, together with a lowering-speed requirement (see 7.2.2.2); requirements for the ear elevator, the husking device, the grain recovery device, the threshing and separating device and the stalk handling system have been added (see 7.2.3 to 7.2.7); a limit for the contamination level of the hydraulic system has been added (see 7.2.8.4); requirements for the drive axle and the gearbox of the transmission system have been added (see 7.2.9.3); the requirements relating to the electrical system have been improved (see 7.2.10.5, 7.2.10.6, 7.2.10.7, 5.8 of the 2008 edition); and the inspection and sampling inspection items have been revised (see Table 3 and Table 4, Table 2 and Table 3 of the 2008 edition).

Compared with GB/T 21961-2008, the main technical changes are as follows: the scope has been revised (see Clause 1, Clause 1 of the 2008 edition); the braking performance test has been revised (see 8.8, 6.5 of the 2008 edition); the determination of power indexes has been deleted (6.3 of the 2008 edition); and normative annexes have been added (see Annex A and Annex B).

This standard was proposed by the China Machinery Industry Federation.

This standard is under the jurisdiction of the National Technical Committee for Standardization of Agricultural Machinery (SAC/TC 201).

The previous editions of the standards replaced by this standard are: GB/T 21961-2008 and GB/T 21962-2008. […]