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QC/T 983-2025 English PDF

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QC/T 983-2025: Measuring method of cleanliness of automobile transmission assembly
Status: Valid

QC/T 983: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
QC/T 983-2025English439 Add to Cart 4 days [Need to translate] Measuring method of cleanliness of automobile transmission assembly Valid QC/T 983-2025
QC/T 983-2014English349 Add to Cart 3 days [Need to translate] Measuring method of cleanliness of automobile manual transmission assembly Valid QC/T 983-2014

Basic data

Standard ID QC/T 983-2025 (QC/T983-2025)
Description (Translated English) Measuring method of cleanliness of automobile transmission assembly
Sector / Industry Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard T21
Classification of International Standard 43.040
Word Count Estimation 22,289
Date of Issue 2025-05-09
Date of Implementation 2025-11-01
Older Standard (superseded by this standard) QC/T 983-2014
Issuing agency(ies) Ministry of Industry and Information Technology of the People's Republic of China

QC/T 983-2025: Measuring method of cleanliness of automobile transmission assembly

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT983-2025
Automobile Industry Standards of the People's Republic of China Replaces QC/T 983-2014 2025-05-09 Release 2025-11-01 Implementation CCS T 21 ICS 43.040 Ministry of Industry and Information Technology of the People's Republic of China issued Cleanliness test method for automobile transmission assembly Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Detection Method 3 4.1 Testing requirements 3 4.2 Test Preparation 5 4.3 Impurity Extraction 7 4.4 Impurity Analysis 8 4.5 Results Report 13 Appendix A (Normative) Sampling Rules 14 Reference 16

Table of Contents

Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces QC/T 983-2014 "Test method for cleanliness of automotive mechanical transmission assembly". In addition to structural adjustments and editorial changes, the main technical changes are as follows. --The scope of application has been changed (see Chapter 1, Chapter 1 of the.2014 edition); --Added terms and definitions (see 3.7 to 3.12); --The content of the general provisions has been changed (see 4.1.1, 4.1.1 of the.2014 edition); --Changed the requirements that cleaning fluids should meet (see 4.1.2, 4.1.1.1 of the.2014 edition); --Changed the requirements that filter membranes should meet (see 4.1.3, 4.1.1.2 of the.2014 edition); --The content of the appliance has been changed (see 4.1.4, 4.1.1.3 of the.2014 edition); --Changed the environmental requirements (see 4.1.5, 4.1.1.4 of the.2014 edition); --Changed the tested transmission and requirements (see 4.1.6, 4.1.1.5 of the.2014 edition); --Changed the blank test requirements (see 4.1.7, 4.1.1.6 of the.2014 edition); --Added personnel requirements (see 4.1.7); --Changed the content of equipment (see 4.2.1, 4.1.2.1 of the.2014 edition); --Changed the test instruments (see 4.2.2, 4.1.2.2 of the.2014 edition); --Deleted the content of equipment (see 4.1.2.3 of the.2014 edition); -- Changed the cleaning steps (see 4.2.3, 4.2.1.1 of the.2014 edition); --Changed the drying operation steps (see 4.2.4.2, 4.2.1.2 of the.2014 edition); --The cooling operation steps have been changed (see 4.2.4.3, 4.2.1.3 of the.2014 edition); --The weighing operation steps have been changed (see 4.2.4.4, 4.2.1.4 of the.2014 edition); --Added the blank test light microscopy operation steps (see 4.2.5.1); --Added the requirements that blank tests should meet (see 4.2.5.3 and 4.2.5.4); --Added attenuation test (see 4.2.6); -- Changed the contents of “cleaning and filtration” in 4.2.3 and 4.2.4 of the.2014 edition and integrated them into “impurity extraction” (see 4.3, 2014 Edition); --Changed the contents of 4.2.5, 4.2.6 and 4.2.7 of the.2014 edition on “drying, cooling, weighing, calculation and impurity analysis”. It is integrated into “Cleanliness Analysis”; the.2014 edition only introduced the filter membrane microscope analysis method, particle counting method, and iron content determination method. The document details the mass method, optical microscopy, light shielding method, energy/wavelength dispersive X-ray fluorescence spectrometry, oil spectroscopy/full spectrum Direct reading plasma emission spectrometry, electron microscopy-energy dispersive spectrometry, Fourier transform infrared spectroscopy/Raman spectroscopy, Fourier transform infrared spectroscopy The detailed operation steps of the micro-infrared spectroscopy method are introduced, and the application scope, advantages and disadvantages of each method are analyzed (see 4.4,.2014 edition 4.2.5, 4.2.6, 4.2.7); --Changed data and reporting (see 4.5, 4.2.8 of the.2014 edition); -- Deleted Appendices A and B (see Appendices A and B of the.2014 edition); --Added sampling rules (see Appendix A). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114). This document was drafted by. Chongqing Qingshan Industrial Co., Ltd., Shanghai Automotive Transmission Co., Ltd., Chongqing Changan Automobile Co., Ltd., Xi'an Fast Automotive Transmission Co., Ltd., Honeycomb Transmission System (Jiangsu) Co., Ltd., Chongqing Akita Gear Co., Ltd., Ningbo Geely Luoyou Engine Parts Co., Ltd., Qixiang Tengda (Beijing) Technology Co., Ltd., Liuzhou Wuling Liuji Power Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd., Qijiang Gear Transmission Co., Ltd., and China Automotive Engineering Research Institute Co., Ltd. The main drafters of this document are. Ding Jiazhen, Xiang Rongxun, Yue Zhongyu, Yang Qin, Liu Bo, Gong Weilun, Zhou Chaodong, Wang Haibing, Peng Tianhe, Liu Junping, Wang Chengbin, Xiao Hongmei, Yuan Yu, Zeng Qibo, Shen Jiarong, Guan Wanlong, Bao Zhenqing, Wen Shishuang, Hao Lihua, Hu Hao, Liu Shoujiang, Chen Xiaofeng, Xiao Jianchun, Peng Pai, Xie Lili, Meng Dongdong, Liu Zhihua, He Youzhi, Huang Dejian, Ding Fangyue, and Hu Xiaojun. The previous versions of this document and the documents it replaces are as follows. --First published in.2014 as QC/T 983-2014; --This is the first revision. Cleanliness test method for automobile transmission assembly 1 Scope This document specifies the cleanliness test method for automobile transmission assemblies. This document is applicable to the cleanliness testing of M-type and N-type automobile transmission assemblies and electric drive assemblies (including lubricants and components). 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. The version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 14039 Hydraulic transmission oil solid particle contamination level code GB/T 25915.1-2021 Cleanrooms and related controlled environments Part 1.Classification of air cleanliness by particle concentration GB/T 41481-2022 Cleanliness of road vehicle components and systems 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Cleanliness of assembly The cleanliness of the assembly is expressed by the mass or quantity, geometric size, and type of foreign particles. Note. Assembly cleanliness is divided into disassembly cleanliness and non-disassembly cleanliness. 3.2 impurity Pollutants that enter from the outside, remain in the product itself, or are generated by the system during the manufacturing, storage, transportation, use, and maintenance of the product. 3.3 filter membrane The polymer film used for cleanliness detection has a knitted or mesh structure and has a special separation ability. Particle retention. 3.4 cleaning fluid cleaner Liquid medium used to wash samples. 3.5 blank experiment A set of tests to test the cleanliness of the system using the method of testing the cleanliness of the sample without the sample. 3.6 mass constant The process of repeatedly drying, cooling, and weighing a substance until its mass remains constant. 3.7 blank value The value obtained from the blank test.

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