1 Scope
This standard specifies the measuring method of cleanliness of automobile manual gearbox assembly.
This standard is applicable to the measuring of cleanliness of automobile manual gearbox assembly (hereinafter referred to as "transmission assembly").
2 Normative References
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 14039 Hydraulic Fluid Power - Fluids - Method for Coding the Level of Contamination by Solid Particles
QC/T 571 Work Guideline for Cleanliness of Automobile - Nouns and Terms
QC/T 574 Work Guideline for Cleanliness of Automobile - Sampling Rules
3 Terms and Definitions
For the purpose of this standard, the terms and definitions given in QC/T 571 and the following apply. For the convenience of application, some terms and definitions in QC/T 571 are listed repeatedly.
3.1
cleanliness of gearbox assembly
cleanliness of gearbox assembly which has been subject to performance inspection, expressed by the mass, quantity and maximum size of impurity particles. According to different specified methods, the cleanliness of gearbox assembly is classified into disassembly cleanliness and undisassembly cleanliness
3.1.1
disassembly cleanliness
disassemble gearbox assembly and measure the cleanliness of specified position with the method as specified in Chapter 4
3.1.2
undisassembly cleanliness
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Measuring Method
Annex A (Normative) Determination Method for Quantity of Indoor Fallen Dust
Annex B (Informative) Measuring Report for Cleanliness of Gearbox Assembly
