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GB/T 6068-2021 English PDF (GBT6068-2021)

GB/T 6068-2021 English PDF (GBT6068-2021)

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GB/T 6068-2021: Test code for truck crane and tyre crane
GB/T 6068-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.020.20
CCS J 80
Replacing GB/T 6068-2008
Test Code for Truck Crane and Tyre Crane
ISSUED ON: MAY 21, 2021
IMPLEMENTED ON: DECEMBER 1, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 7 
2 Normative References ... 7 
3 Terms and Definitions ... 9 
4 Test Conditions ... 10 
5 Chassis Running-in ... 11 
6 Preparatory Test ... 11 
7 Measurement of Mass Parameters ... 16 
8 Measurement of Geometric Parameters ... 16 
9 Driving Performance Test ... 18 
10 Determination of Operation Parameters ... 24 
11 No-load Test ... 26 
12 Rated Load Test ... 27 
13 Dynamic Load Test ... 29 
14 Static Load Test ... 31 
15 Complete-crane Stability Test ... 34 
16 Sealing Performance Test ... 36 
17 Determination of Specific Ground Pressure of Support ... 37 
18 Measurement of Solid Particle Pollution of Hydraulic Oil ... 38 
19 Hydraulic System Test ... 38 
20 Operating Reliability Test ... 38 
21 Driving Reliability Test ... 39 
22 Measurement of Exhaust Smoke ... 39 
23 Noise Measurement ... 39 
24 Structural Test ... 39 
25 Industrial Test ... 51 
26 Inspection Rules ... 54 
Appendix A (informative) Industrial Test Records of Cranes ... 59 
Test Code for Truck Crane and Tyre Crane
1 Scope
This document specifies the test conditions, chassis running-in, preparatory test,
performance test, reliability test, structural test, industrial test and inspection rules of
truck cranes (including all-terrain cranes) and tyre cranes (hereinafter referred to as
cranes).
This document is applicable to truck cranes and tyre cranes.
2 Normative References
The contents of the following documents constitute indispensable clauses of this
document through normative references in the text. In terms of references with a
specified date, only versions with a specified date are applicable to this document. In
terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB 1495 Limits and Measurement Methods for Noise Emitted by Accelerating Motor
Vehicles
GB/T 3730.3 Motor Vehicles and Towed Vehicles - Dimensions of Vehicles - Terms and
Definitions
GB/T 3811 Design Rules for Cranes
GB 3847 Limits and Measurement Methods for Emissions from Diesel Vehicles under
Free Acceleration and Lug down Cycle
GB 4094 Motor Vehicles - Symbols for Controls, Indicators and Tell-tales
GB 4785 Prescription for Installation of the External Lighting and Light-signaling
Devices for Motor Vehicles and Their Trailers
GB/T 5905 Cranes - Test Code and Procedures
GB 7258 Technical Specifications for Safety of Power-driven Vehicles Operating on
Roads
GB/T 6974.1 Cranes - Vocabulary - Part 1: General
GB/T 6974.2 Cranes - Vocabulary - Part 2: Mobile Cranes
is in the driving state.
3.3 Maximum Boom Length
Maximum boom length refers to the boom with the maximum length that is composed
of the main boom and the jib and can be used for operation.
NOTE: the maximum boom length is the distance from the center of the hinge point of the
main boom tail to the center of the fixed pulley on the longest jib head along the
axis of the boom when the included angle between the main boom and the jib is
the minimum and the main boom is the longest.
4 Test Conditions
4.1 The driving performance test conditions of truck cranes shall comply with the
stipulations of GB/T 12534.
4.2 The cranes shall be equipped with working devices corresponding to the test
conditions.
4.3 There shall be 1/3 ~ 2/3 fuel volume in the fuel tank. The oil level of the hydraulic
oil tank shall be within the specified scale range of the fuel level indicator, and the water
tank shall be full.
4.4 During the test of the cranes, the tyre inflation pressure shall comply with the
stipulations of the tyre and crane manufacturer, with a tolerance of ± 3%.
4.5 The ground shall be level and solid, with an inclination not greater than 1%.
4.6 The wind speed shall satisfy the following requirements:
a) During the operating performance test, the wind speed shall be not greater
than 8.3 m/s;
b) During the structural test, the wind speed shall be not greater than 4 m/s;
c) During the driving reliability test, the wind speed is not restricted by the above-
mentioned conditions.
4.7 Ambient temperature: -20 °C ~ + 40 °C.
4.8 The test load shall be accurately calibrated, and its tolerance:
a) ± 1% for vertical load;
b) ± 3% for horizontal load.
4.9 Under the condition of not affecting the test effect, the test items may be
interspersed or combined in accordance with the test content and load condition. Tests
are only carried out when the crane has the corresponding mechanisms and functions
(such as: jib, boom extension and retraction with load and travel with load, etc.), and if
there are no such mechanisms or functions, this is not required.
4.10 Cranes with special requirements shall be tested in accordance with the
conditions required by the contract.
5 Chassis Running-in
5.1 The cranes shall be subject to chassis running-in before the type test, and the
running-in mileage is:
---Not less than 50 km for truck cranes;
---Not less than 20 km for tyre cranes.
The running-in is carried out in two stages, and the running-in mileage of each stage
accounts for 50% of the total mileage, in which:
---During the first stage of running-in, the engine speed is 50% of the rated speed;
---During the second stage of running-in, the engine speed is 75% of the rated
speed.
5.2 If excessive impurities or deterioration of lubricating oil are found during the
running-in period, the lubricating oil shall be replaced in time.
6 Preparatory Test
6.1 Materials
6.1.1 Test schedule
The main contents of the test schedule shall include: test conditions, test items, cyclic
operation content, test methods and qualification determination principles, etc.
6.1.2 Test record
The test record shall generally include the following contents:
---Model and name of sample crane;
---Engine model and serial No., maximum net power;
---Test date, ambient temperature, wind power and wind direction;
c) The appearance and operating state of all hydraulic and pneumatic
components and pipelines;
d) The installation of all hydraulic and pneumatic components; the operating
performance of operating handles and pedals, etc.;
e) The range corresponding to the installation of the pressure sensor;
f) The correctness and reliability of the installation of electrical circuits and
components;
g) The reliability of hooks and connectors; wire ropes and pulleys shall not be
defective;
h) The volume of cooling water, hydraulic oil and fuel, etc.;
i) The dangerous parts and signs shall comply with the stipulations of GB/T
15052;
j) The marking of lifting hooks shall comply with the stipulations of GB/T 10051.1
~ GB/T 10051.5;
k) The wire rope anti-drop device shall effectively prevent the wire rope from
falling off;
l) Cranes with a lifting height greater than 50 m shall be equipped with an
anemometer; the real-time wind speed parameters shall be able to be
displayed in the control device;
m) The accuracy of the pressure gauge is not lower than Level 1.5. ...
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