This standard specifies the type test method for plateau type wheel loaders. This standard is applicable to plateau type wheel loaders (hereinafter referred to as plateau type loaders) that are used in the open air and operate in a forward-facing manner at an altitude of 1500 to 4500 meters. JB/T 5931.3-1991 Type test method for plateau type wheel loaders JB/T5931.3-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Highland Type Wheel Loader
Type Test Method
1 Subject Content and Scope of Application
This standard specifies the type test method for highland type loaders. JB/T 5931.3-91
This standard applies to highland type wheel loaders (hereinafter referred to as highland type loaders) that operate in a positive front-end manner, are used in the open air at an altitude of 1500 to 4500m.
2 Reference Standards
JB3688.3 Type Test Method for Wheel Loaders JB3826
3 General Provisions
Performance Test Method for Diesel Engines for Engineering Machinery 3..1 Test Contents Include:
a. Whole Machine Performance Test;
Highland Industrial Test.
3.2 All new products and modified, transferred or significantly improved old products shall be subject to the above two tests to review the rationality of the prototypes being put into mass production.
For new products and transferred old products, the test outline shall be prepared according to the entire content of this standard. For modified and significantly improved old products, the outline may be prepared according to some items of this standard based on the degree of change in structure and process. 3.3 Provide 2 to 3 prototypes for type testing, one or two of which will directly enter the plateau industrial performance test; the other will be put into the plateau industrial performance test after the whole machine performance test is completed until the test is completed. 3.4 In addition to complying with the provisions of Article 1.4 of JB3688.3, ​​the technical data available during the plateau loader test shall also include the plateau device manual and performance test report of the test machine. 3.5 Technical preparations before the test
Should comply with the provisions of Article 1.5 of JB3688.3. 3.6 The whole machine performance test items specified in this standard must be carried out at a test site at an altitude of 3000m or in a laboratory simulating an altitude of 3000m.
4 Whole machine performance test
4.1 Determination of geometric dimensions of plateau loaders. 4.2 Determination of weight, center of gravity and stability.
4.3 Determination of the force of plateau loaders.
4.4 Determination of the action time of working devices.
The above 4.1~4.4 shall comply with the provisions of 2.1~2.4 in JB3688.3 respectively. Among them, Table 10 and Table 11 add two conditions: altitude and pressure. Approved by the Ministry of Machinery and Electronics Industry on December 17, 1991 and implemented on July 1, 1992

4.5 Plateau low temperature starting testbZxz.net
JB/T5931.3~91
The prototype adopts plateau low overflow starting measures, and is placed in neutral position under the condition of ambient temperature below -25℃ and shutdown for more than 12 hours. Starting conditions, test conditions, test methods and measurement items shall comply with the provisions of Articles 4.1~4.14 of JB3826. 4.6 Driver's working conditions assessment
4.6.1 Cab insulation and heating measurement
During winter operation, the cab is closed, the heating system is turned on, and a thermometer is hung under the instrument panel. The temperature is measured at the same time as the ambient temperature, 20 minutes each time, and a total of 2 hours. The measurement results are compiled into the report. 4.6.2 Other assessment items shall comply with the provisions of Article 2.5 of JB3688.3. 4.7 Plateau loader passability index measurement. 4.8 Plateau loader braking test.
4.9 Plateau loader maneuverability test.
The above 4.7~4.9 shall comply with the provisions of Articles 2.6~2.8 of JB3688.3 respectively. 4.10 Plateau loader dynamic test
The hydraulic transmission oil temperature of the plateau loader shall be kept within 90~110℃, and each test shall comply with the provisions of Article 2.9 of JB3688.3. Among them, Table 22, Table 23, Table 24, Table 26 and Table 27 add five conditions: altitude, air pressure, air temperature, relative humidity and hydraulic transmission oil temperature. 4.11 Technical and economic index assessment
The technical and economic index assessment shall comply with the provisions of Article 2.10 of JB3688.3, ​​and Table 28 adds three conditions: altitude, air pressure and air temperature.
5 Plateau industrial test
This test should always be carried out at a plateau operation site with an altitude of 2000 to 4500m. The operation time at an altitude of more than 3000m shall not be less than 500h.
5.1 Test purpose
The purpose of the plateau industrial test is to conduct a comprehensive assessment of the reliability and economy of the plateau loader under plateau field conditions to evaluate the product quality indicators.
5.2 Test content
Verification of the reliability index of the plateau loader; statistics on the productivity and fuel consumption of the plateau loader; assessment of the driver's working conditions;
Technical maintenance and repair conditions;
Evaluation of the performance of the plateau loader.
5.3 Test duration conditions
The duration of the plateau loader industrial test can be selected within the first overhaul cycle after the machine leaves the factory according to the specific requirements for the reliability index. The plateau industrial test time is 1000h. During the plateau industrial test, there should be 200 hours of winter operation. 5.4 Operation mode regulations
Should comply with Article 3.3 of JB3688.3. 5.5 Reliability information collection
All production activities of the loader during the test should be monitored by the test personnel. Including operation, maintenance, repair and work area transfer. All intelligence data should be timely counted and filled in according to the format and content specified in Tables 29, 30, 31 and 32 of JB3688.3. Pay special attention to filling in the faults and troubleshooting measures of each plateau device in detail. Table 32 should add the following plateau device assessment content: a.
Assessment items of plateau type loader reliability indicators; statistics of use productivity and fuel consumption; c.
Assessment of driver working conditions:
Technical maintenance and repair conditions.
JB/T5931.391
The above a, b, c, d should comply with the provisions of 3.5 to 3:8 of JB3688.3. Evaluation of the stability of the whole machine performance
At the beginning, middle and end of the test, the following items shall be measured respectively: a.
Diesel engine cooling water temperature, hydraulic transmission oil, hydraulic oil, engine oil temperature; technical productivity and fuel consumption;
Working device action speed;
Maximum vehicle speed, brake release:
Digging force, lifting force, maximum traction force, tipping force (at maximum turning angle), according to the comparison of the data measured in the three periods of the above items, as the working capacity of the plateau type loader and the stability of the whole machine performance. 6
Technical appraisal
After all the test items are completed, the loader should be dismantled for inspection, and the technical status of the whole machine and parts should be appraised. The contents are: a.
Normal status of supercharger and intercooler; filtration performance of plateau air filter;
Practical, reliable and sensitive status of low-temperature starting device; applicability and reliability of water and oil coolers; reliable status of cab heating and defrosting system; adaptability and durability of low-temperature hydraulic oil and hydraulic transmission oil: wear of connecting rod, bucket teeth, tires, etc.; wear of gears and transmission shafts and matching clearance status; welding integrity of frame and supporting parts: defects, damage conditions and cause analysis of various parts; reliability of fastening, riveting and welding parts, quality reliability of sealing parts;
assembly and maintainability evaluation of loader parts; integrity of special tools, spare parts and technical documents; applicability and durability reliability of lubricating oil and grease; on the basis of identification, the quality of the whole machine and parts should be evaluated. Sorting out test results
Type test report should be written after the test results. The content is as follows: a.
Preface;
Conditions and results of plateau whole machine performance test;
Conditions and results of plateau industrial test;
Technical appraisal;
Conclusion and suggestions;
Appendix.
Additional notes:
JB/T5931.1~5931.3—91
This standard is proposed and managed by Tianjin Engineering Machinery Research Institute. This standard is drafted by Xining Plateau Engineering Machinery Research Institute. The main drafters of this standard are Wang Pei and Feng Huisheng. 8
People's Republic of China
Mechanical Industry Standard
Highland Type Wheel Loader
JB/T5931.1~5931.3—91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
No reproduction
Copyright reserved
Qinghe County, Hebei Province, China
Format 880×12301/16 Printing Sheet 7/8
Number of Words 14000
First Edition December 1991 First Printing December 1991 Printing 00.001—500 Price 1.40 yuan
No.0493
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