GB/T 21958-2017Wheeled tractor—Front drive axle (English PDF)

1 Scope

This standard specifies the model compilation, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage of front drive axles of wheeled tractors.

This standard applies to the front drive axle of four-wheel drive tractors (hereinafter referred to as the front drive axle).

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.

GB 1922 Petroleum solvents for paints and cleaning

GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests

GB/T 13306 Plates

GB/T 14039-2002 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles

GB/Z 19848 Hydraulic fluid power - Component cleanliness - Guidelines for achieving and controlling cleanliness of components from manufacture to installation

3 Model compilation

The model of the front drive axle consists of the product identification code (can be omitted), the maximum power code of the matching machine, the structural type code, the function code, the operating environment code, the variant code. The arrangement order is as follows. […]

4 Technical requirements

5 Test method

5.1 The appearance quality shall be inspected by visual inspection.

5.2 The dimensional tolerance and geometric tolerance of each part shall be inspected by measuring tools of corresponding accuracy level.

5.3 Each fastening connector shall be inspected by a measuring tool of corresponding accuracy level.

5.9 The cleanliness test of the front drive axle shall be carried out in accordance with the provisions of Appendix E.

5.10 The transmission efficiency determination test of the front drive axle shall be carried out in accordance with the provisions of Appendix F.

5.11 The noise test of the front drive axle shall be carried out in accordance with the provisions of Appendix G.

5.12 The oil temperature test of the front drive axle shall be carried out in accordance with the provisions of Appendix H.

5.13 The transmission durability test of the front drive axle shall be carried out in accordance with the provisions of JB/T 11673-2013.

5.18 The vertical bending stiffness and vertical bending static strength test of the axle housing of the front drive axle shall be carried out in accordance with the provisions of 3.2.2 of JB/T 5928-2014.

5.19 The vertical bending fatigue test of the axle housing of the front drive axle shall be carried out in accordance with the provisions of 4.3 of JB/T 9828-1999.

6 Inspection rules

7 Marking, packaging, transportation, storage

7.1 The front drive axle shall be fixed with a product label in accordance with GB/T 13306 in a prominent position; its content includes.

7.2 The packaging of the front drive axle shall ensure that it will not be damaged or lost under normal transportation conditions.

7.3 The front drive axle is generally fixed with a special bracket and then installed naked. It can also be packaged according to user requirements and shall be protected as follows.

7.5 The front drive axle shall be shipped from the factory to ensure that the parts will not be damaged under normal transportation conditions.

7.6 The front drive axle shall be stored in a ventilated and dry warehouse. It is strictly forbidden to mix with corrosive substances. The placement of the front drive axle shall ensure that it will not be deformed or damaged. […]