This standard specifies the technical requirements, inspection rules, marking, packaging and storage of agricultural tractor clutch assemblies (excluding the operating mechanism). This standard applies to dry and normally engaged friction clutch assemblies of agricultural tractors and agricultural transport vehicles. JB/T 6703-1993 Technical conditions for tractor clutch assemblies JB/T6703-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Tractor clutch assembly
Technical conditions
1 Subject content and scope of application
JB/T 6703...93||tt| |This standard specifies the technical requirements, inspection rules, marking, packaging and purchasing and stocking of agricultural puller clutch assemblies (excluding operating mechanisms). This standard applies to dry, normally engaged friction clutch assemblies of agricultural pullers and transport vehicles. 2 Reference standards
GB2828 Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspection of consecutive batches) IB/T5184 Tractor flywheel and clutch overspeed test method JB/T5673 General technical conditions for painting of agricultural and forestry tractors and equipment NJ403 Tractor Clutch bench test method 3 Technical requirements
3.1 The clutch assembly shall comply with the requirements of this standard and be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures. 3.2 The components of the clutch assembly should comply with the requirements of its corresponding standards. 3.3 The surface painting of the clutch assembly shall comply with the regulations of JB/T5673. 3.4 The parts of the clutch assembly should be cleaned thoroughly before assembly, and there should be no oil on the clutch friction surface and friction plates. 3.5 The clutch assembly should adjust the separation lever so that the tops of each are on the same rotating plane parallel to the working plane of the pressure plate. The difference in height between them is no more than 0.25mm. The height difference between the separation fingers of the diaphragm spring is different from each other. Not larger than 0.80mm. 3.6 All lock nuts, adjustment screws and fixing screws should be tightened and reliably locked according to the torque required by the product drawing. 3.7 The deviation of the pressure plate pressing force of the clutch assembly in the combined state from the nominal value specified in the product technical document should not be greater than ±10%. 3.8 The static friction torque of the clutch assembly in the combined state should be within the range of 1 to 1.15 of the nominal value specified in the product technical document. 3.9 The average starting temperature rise of the friction surface of the clutch assembly should not be greater than 5C. 3.10 During the thermal decay performance test of the clutch assembly, the ratio of the sliding friction torque to the maximum sliding friction torque during the sliding process at the temperature specified in Table 1 should not be less than 65%.
Table 1
Materials
Quality
Asbestos or organic materials
Powder metallurgy materials
3.11 clutch assembly passed through the bench 6X101 times After the durability test, it should comply with the requirements in Table 2. Table 2
Amount of wear on one side of the friction plate
Amount of wear on the E wheel and pressure plate
Amount of wear on the top of the separation lever
Ministry of Machinery Industry of the People's Republic of China 1993-07 -29 approved 90
Friction surface temperature
250±5
300+5
mtm
1.0
0.10||tt| | 1.0 | When reaching 2.5 times the rated speed of the matching engine, no parts should be broken or damaged. 3.13 As long as the user abides by the installation, maintenance and usage rules stipulated in the tractor instruction manual, the warranty period will be the same as the warranty period stipulated in the main engine. During the warranty period, if the clutch assembly is damaged or cannot be used normally due to the manufacturer's responsibility, the manufacturer shall be responsible for repair, replacement or refund. Www.bzxZ.net
4 Inspection Rules
4.1 Outbound Inspection
Each clutch assembly can only leave the factory after passing the inspection by the quality inspection department of the manufacturer. The inspection items are Articles 3.5 and 3.8. 4.2 Type inspection
For clutch assemblies that are newly designed or have been significantly improved or transferred to another factory, bench testing should be carried out in accordance with the relevant provisions of NJ403 and JB/T5184 in Articles 3.7~~3.12
4.3 Regular spot checks
For mass-produced products, bench tests for items 3.7 to 3.12 should be carried out every three years. 4.4 When the ordering unit randomly inspects the clutch assembly in accordance with this standard, it shall be sampled in accordance with the provisions of GB2828. - Generally, a normal sampling is used, and - the general inspection level is a plan of 1. However, the sampling plan and inspection level can also be agreed between the supplier and the buyer based on the batch size. 5 Marking, packaging and storage
5.1 When each assembly leaves the factory, it should have a product certificate from the manufacturer and indicate the manufacturer's name or trademark (the OEM is allowed not to do this during production).
5.2 The assembly must be cleaned before packaging, and anti-rust measures should be taken on exposed processed surfaces, threads, etc. Then package it in strong and water-proof neutral paper or plastic bags and fix it in the packaging box. It also comes with the product certificate, packing list, and installation instructions. The certificate should include the following content:
Manufacturer’s name and trademark;
a.
Product model, product name:
b.
Manufacturer Signature of the quality inspection department;
d.
Manufacturing date and factory number.
5.3 A prominent place on the outside of the packaging box should be marked:
a.
h.
c.
Manufacturer’s name or trademark; ||tt| |Product model, product name;
Receiving unit, address:
Quantity, gross weight, net weight in the box;
d.
e.||tt| | "Handle with care" and "Protect against moisture" words.
5.4 The total weight of the packaging box generally does not exceed 50kg. If the ordering unit agrees, simple packaging can be used as agreed by both parties. The manufacturer should ensure that the product is stored under good warehouse storage and normal storage conditions after leaving the factory. It will not cause 5.5
rust within 12 months of use.
Additional notes:
This standard is proposed by the National Technical Committee for Tractor Standardization. This standard is under the jurisdiction of the Luoyang Tractor Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Luoyang Tractor Research Institute of the Ministry of Machinery Industry, with Henan Province Tangyin Agricultural Machinery Manufacturing Co., Ltd. participating in the drafting. The main drafters of this standard are Luan Xinli, Cao Benhui and Zheng Xiangqing. From the date of implementation of this standard, NJ398--86 "Technical Conditions for Tractor Clutch Assembly" will be invalidated, 91
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