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GB/T 4331-2024: Agricultural trailer - Test methods
Status: Valid GB/T 4331: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4331-2024 | English | 279 |
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Agricultural trailer - Test methods
| Valid |
GB/T 4331-2024
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| GB/T 4331-2003 | English | 399 |
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Test methods for agricultural trailer
| Obsolete |
GB/T 4331-2003
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| GB/T 4331-1984 | English | 359 |
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Test methods for agricultural trailers
| Obsolete |
GB/T 4331-1984
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PDF similar to GB/T 4331-2024
Basic data | Standard ID | GB/T 4331-2024 (GB/T4331-2024) | | Description (Translated English) | Agricultural trailer - Test methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B91 | | Classification of International Standard | 65.060.10 | | Word Count Estimation | 14,141 | | Date of Issue | 2024-04-25 | | Date of Implementation | 2024-11-01 | | Older Standard (superseded by this standard) | GB/T 4331-2003 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 4331-2024: Agricultural trailer - Test methods---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 65:060:10
CCSB91
National Standards of People's Republic of China
Replace GB/T 4331-2003
Test methods for agricultural trailers
Released on 2024-04-25
2024-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Foreword
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 GB/T 4331-2003 "Test methods for agricultural trailers": Compared with GB/T 4331-2003, in addition to structural adjustments and
In addition to logical changes, the main technical changes are as follows:
a) The scope has been changed (see Chapter 1, Chapter 1 of the:2003 edition);
b) The matching requirements of trailers and tractors have been changed (see 4:1:1, 3:1:1 of the:2003 edition);
c) Added the requirement that the braking action of the trailer rear axle should lag behind the braking action of the tractor by no more than 0:2s (see 4:1:3);
d) Added the requirement to adjust the test status of trailers and tractors according to the test requirements (see 4:1:4);
e) Deleted "The test instruments and meters shall meet the measurement accuracy requirements, shall be qualified by verification and within the validity period:
Instruments and meters see Appendix A (Informative Appendix)" (see 3:1:3 of the:2003 edition);
f) The test period requirements have been changed (see 4:1:5, 3:1:4 of the:2003 edition);
g) The test measurement accuracy requirements have been deleted (see 3:1:6 and Table 1 of the:2003 edition);
h) Added trailer size parameters, hydraulic parameters for dump trailers when dumping, and site requirements for tangential tension test of full trailer traction links:
Request (see 4:2:1);
i) Added the requirements for the use of floor scales and wheel load meters (see 4:2:2);
j) Added weather conditions requirements for road tests (see 4:2:3);
k) The test requirements for trailer braking performance have been changed (see 4:2:4, see 3:2:3 of the:2003 edition);
l) Deleted "During service braking, the brake footprint of the trailer should be larger than that of the tractor" (see 3:2:4 of the:2003 edition);
m) Added requirements for tire inflation pressure (see 4:2:5);
n) Added brake performance test requirements for trailers in wading operations (see 4:2:6);
o) Added the measurement method of dimensional parameters (see 5:1);
p) Added the measurement method of the ratio of rear overhang to wheelbase (see 5:2);
q) Added the measurement method of the front turning radius of mid-axle trailers and semi-trailers (see 5:3);
r) Added mass parameters and axle load measurement methods (see 5:4);
s) Added the method for measuring the tilt angle of the dump trailer compartment (see 5:5);
t) Added the method for measuring the tangential tension when the trailer is unloaded (see 5:6);
u) Added the measurement method of the hinge angle and the limit torsion angle of the articulated mechanism (see 5:7);
v) Added the brake operating force test method (see 5:8);
w) Added brake response time test method (see 5:9);
x) Added the brake system brake line sealing test method (see 5:10)
y) Added the test method for lateral swing and radial runout of wheel assembly (see 5:11);
z) Added the test method for the ratio of the lifting force of the car body to the deadweight of the car body (see 5:12);
aa) The service brake performance test method has been changed (see 5:13:1, 4:2:1 of the:2003 edition);
bb) The parking brake performance test method has been changed (see 5:13:2, 4:2:2 of the:2003 edition);
cc) The braking stability test method has been changed (see 5:13:3, 4:3 of the:2003 edition);
dd) Added the roll stability angle test method (see 5:14);
ee) Added the test method for the lifting time of the dump trailer compartment (see 5:15);
ff) Added the test method for static settlement of lifting cylinder (see 5:16);
gg) The reliability test purpose has been deleted (see 5:1 of the:2003 edition);
hh) The reliability test mileage requirements have been changed (see 6:1:1, 5:2:1 of the:2003 edition);
i) The reliability test loading requirements have been changed (see 6:3, 5:4 of the:2003 edition);
j) Changed the fault classification and judgment principles (see 6:6, 5:7:2 of the:2003 edition);
kk) Deleted the mean mileage to first failure (see 5:8:1 of the:2003 edition);
l) The test report has been deleted (see Chapter 6 of the:2003 edition);
mm) The trailer main parameter measurement record table (see Table 3 of the:2003 edition) was deleted;
nn) The braking performance test record table (see Table 4 of the:2003 edition) was deleted;
oo) The parking performance test record table (see Table 5 of the:2003 edition) was deleted;
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 by the China Machinery Industry Federation:
This document is under the jurisdiction of the National Technical Committee for Agricultural Machinery Standardization (SAC/TC201):
This document was drafted by: Guangxi Zhuang Autonomous Region Automobile and Tractor Research Institute Co:, Ltd:, Guangxi Zhuang Autonomous Region Agricultural Mechanization Service Center
Center, Luoyang Xiyuan Vehicle and Power Inspection Institute Co:, Ltd:, Guangxi Hepu County Huilaibao Machinery Manufacturing Co:, Ltd:, China Agricultural Mechanization Science
Research Institute Group Co:, Ltd:, Jiangsu Coastal Agricultural Machinery Testing Co:, Ltd:, Guangxi University of Science and Technology, Jiamusi Inspection and Testing Center, Shandong Shen
ZONG MACHINERY TECHNOLOGY CO:, LTD:
The main drafters of this document are: Chen Qian, Ye Changqing, Sun Panpan, Gao Qiaoming, Yi Bo, Lv Shusheng, Kong Nianjun, Pan Yanhong, Liu Ya, Zhang Xiansheng,
Yi Jiangui, Liao Decai, Chen Junbao, Huang Shenfeng, Liang Guanghui, Sun Guiqin, Zhang Peng, Lu Guangwei, Li Yong, Wang Xichao, Zhang Qi, Sun Youshun, Liao Hanping,
Tang Neng, Fu Lianjun:
The previous versions of this document and the documents it replaces are as follows:
---First issued in 1984 as GB 4331-1984 and first revised in:2003 as GB/T 4331-2003;
---This is the second revision:
Test methods for agricultural trailers
1 Scope
This document describes the test conditions, general item test methods and reliability test methods for agricultural trailers:
This document applies to the parameters of agricultural trailers (referred to as "trailers") or tractor-trailer units (referred to as "units") that are matched with tractors:
Routine project tests such as measurement, performance test and reliability test:
2 Normative references
This document has no normative references:
3 Terms and definitions
There are no terms or definitions that require definition in this document:
4 Experimental preparation and conditions
4:1 Test preparation and requirements
4:1:1 Select a tractor that is suitable for the trailer model and specifications according to the instruction manual, and the tractor should be in normal technical condition:
state:
4:1:2 The trailer should be adjusted and maintained according to the instructions and the trailer should be in normal technical condition:
4:1:3 Check the trailer brakes: The time lag between the trailer rear axle brake action and the tractor brake action should not exceed 0:2s:
4:1:4 Adjust the test status of the trailer and tractor according to the test requirements: When testing the trailer without load, it should be free of load, mud and dirt, and have all accessories:
state; When the trailer is fully loaded or overloaded, the load should be evenly distributed in the compartment and securely fixed:
4:1:5 During the entire test period, except for operation and technical maintenance as specified in the instruction manual, the prototype vehicle should not be adjusted or changed at will:
Technical status (such as replacement, repair, etc:):
4:1:6 All abnormal phenomena occurring during the test should be recorded in detail:
4:2 Test conditions
4:2:1 The trailer dimensions, the hydraulic parameters of the dump trailer when dumping and the tangential tension test of the traction link of the full trailer should be carried out on a solid and flat surface:
The test shall be carried out on a well-planned site, and the site area should be able to accommodate the shape of the test trailer:
4:2:2 When using a floor scale and wheel load meter, the floor scale surface area should be able to accommodate all the axles of the trailer being tested, and the floor scale entrance and exit ground should be
Keep it at the same level as the table surface; the wheel load meter should ensure that the upper plane of each wheel load meter is in the same horizontal plane:
4:2:3 During the road test, the relative humidity should be less than 95%, the air temperature should be between 0℃ and 40℃, there should be no fog, rain or hail, and the wind should not be strong:
The speed is not more than 3m/s:
4:2:4 The road test should be carried out on a flat, hard, clean, dry cement or asphalt road surface with an adhesion coefficient between the tire and the ground of not less than 0:7:
The longitudinal slope of the road surface for the service braking performance test should not be greater than 1%, and the transverse slope should not be greater than 3%:
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