This standard specifies the process specifications for ensuring the cleanliness of hydraulic systems of agricultural tractors. This standard applies to hydraulic systems of agricultural tractors. JB/T 6713-1993 Process specifications for ensuring the cleanliness of hydraulic systems of tractors JB/T6713-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 6713-1993
Technology Specification for Cleanliness of Tractor Hydraulic System
Published on July 29, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Technology Specification for Cleanliness of Tractor Hydraulic System
Subject Content and Scope of Application
This standard specifies the technology specification for cleanliness of hydraulic system of agricultural tractor. This standard is applicable to hydraulic system of agricultural tractor. 2 Technology Specification for Cleanliness of Tractor Hydraulic System 2.1 Casting Cleaning
a. Use shot blasting cleaning method;
b. Use electro-hydraulic cleaning method.
2.2 Deburring of parts
2.2.1 Deburring methods
JB/T 6713-1993
a. Vibration deburring: Use ceramic abrasive blocks on a vibration finishing machine to deburr small steel parts, such as oil pump gears, small shafts and valve stems (cores).
b. Plane deburring: Use a disc-shaped nylon brush. Applicable to deburring the surface of the oil pump housing, pump cover, side plate and valve body. c.
External deburring: Use an external deburring machine. Applicable to deburring shaft parts, such as valve stems and piston rods. d. Inner hole deburring: Use nylon brushes of different specifications or flexible hole grinders with electric tools, which are suitable for deburring the inner holes of parts, oil pump housing holes and bearing holes.
eManual deburring: Some parts of the parts cannot be mechanically deburred, and manual deburring can be used, such as threaded holes. Electrochemical deburring: For example, deburring the edge of the gear tooth profile end face of the oil pump. f.
Deburring process arrangement
a. Between processes;
b. After all mechanical processing processes.
Parts cleaning and rust prevention
Before finishing and after a certain process, such as before grinding, after tapping and after grinding, the parts should be cleaned between processes. 2.3.1
2.3.2All parts should be cleaned, dried, and treated with rust prevention before storage, and dust prevention measures should be taken. Other parts that have not been cleaned should be cleaned and dried before assembly. 2.3.3
Rust prevention of oil pipes and oil tank parts should be treated with zinc passivation or phosphating. 2.3.4
2.3.5The non-machined surface of the casting should be coated with an oil-resistant coating. 2.4 Hydraulic parts assembly
The dust fall in the hydraulic parts assembly workshop for 24 hours should not exceed 100mg/m2.2.5 Hydraulic parts factory test
Approved by the Ministry of Machinery Industry on July 29, 1993
Implemented on January 1, 1994
JB/T6713-1993
The solid particle contamination level of the hydraulic oil used for the test shall not be higher than 19/162.6 Packaging and storage of hydraulic parts
When packaging, all exposed threaded parts should be protected by plastic sleeves, and the oil ports should be sealed with plastic plugs. 2.6.1
The packaging should be dust-proof and moisture-proof. Hydraulic parts should be stored in a dry warehouse without corrosive gases and should not be stored in the open air. 2.6.3
2.7 Hydraulic system cleaning
2.7.1 After the tractor hydraulic system is assembled, the hydraulic system should be cleaned. 2.7.2
Requirements for cleaning fluid
The same brand of oil used in the tractor hydraulic system should be used as the cleaning fluid, and the solid particle contamination level of the cleaning fluid should be lower than 19/16.
Cleaning method
Use power to drive the oil pump of the hydraulic system to circulate the cleaning fluid with a temperature of 50±10℃ in the hydraulic system. And turn the valve control handle several times to make the cylinder (motor) achieve full stroke lifting (operation), and the cleaning time should be no less than 10 minutes. 2.7.4
Work after cleaning the hydraulic system
Discharge all the cleaning fluid;
Replace or clean the oil filter in the hydraulic system; b.
Add new hydraulic oil, and the solid particle contamination level of the new hydraulic oil shall not be higher than 19/16. c.
Additional Notes:
This standard was 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 was drafted by the Luoyang Tractor Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Li Zunrong.
People's Republic of China
Mechanical Industry Standard
Process Specification for Ensuring Cleanliness of Tractor Hydraulic SystembZxz.net
JB/T67131993
Published and Distributed by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Sheet 3/8
Format 880×1230
Word Count 4,000
First Edition in December 1993
First Printing in December 1993
Print Quantity 1-500
Price 3.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn66_9
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