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JT/T 155-2004 PDF in English

JT/T 155-2004 (JT/T155-2004, JTT 155-2004, JTT155-2004)
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JT/T 155-2004: PDF in English (JTT 155-2004)

JT/T 155-2004
ICS 43.180
R 17
Registration number.
Replacing JT/T 155-1994
Automobile lift
Issued by Ministry of Communications of the People's Republic of China
Table of contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Product classification ... 6 
5 Requirements ... 6 
6 Test method ... 11 
7 Inspection rules ... 16 
8 Marking, packaging, transportation and storage ... 17 
This standard replaces JT/T 155-1994 “Specification for automobile lift”.
As compared with JT/T 155-1994 “Specification for automobile lift”, the main
changes of this standard are as follows.
- In Chapter 3 “Terms and definitions”, ADD 3.1, 3.4, and 3.5;
- In Chapter 4 “Product classification”, CHANGE the product classification
- In Chapter 5 “Requirements”, ADD the product safety performance
requirements of 5.1.1,, 5.5.1,,,, and 5.5.3;
CHANGE the 5.5 performance requirements of the whole machine;
- In Chapter 6 “Test methods”, CHANGE the item test method, ADD the test
items of 6.3, 6.4.2, 6.4.3 and 6.5;
- In Chapter 8 “Marking, packaging, transportation and storage”, ADD the
safety signs and graphics.
This standard was proposed by AND shall be under the jurisdiction of the
National Standardization Committee for Automotive Maintenance (SAC/TC
The responsible drafting organization of this standard. Institute of Highway
Science, Ministry of Communications.
The participating drafting organizations of this standard. Hefei Wan’an
Machinery Factory, Guangzhou Transit Auto Equipment Co., Ltd.
The main drafters of this standard. Ren Yahua, Han Xiaoning, Sheng Xiaowen,
Liu Yuanpeng.
This standard was first published in 1994.
Automobile lift
1 Scope
This standard specifies the terms and definitions, product classification,
requirements, test methods, inspection rules, and marking, packaging,
transportation and storage of automobile lift.
This standard is applicable to all kinds of hydraulic transmission and
mechanical transmission automobile lift having a rated lifting capacity of not
more than 20000kg (hereinafter referred to as the lift).
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 191 Packaging - Pictorial marking for handling of goods (eqv ISO 780)
GB/T 2681 Colors of insulted conductors used in electrical assembly
GB/T 2682 Colors of indicators and buttons used in electrical assembly
GB 2894-1996 Safety signs (neq ISO 3864.1984)
GB/T 3323 Methods for radiographic inspection and classification of
radiographs for fusion welded butt joints in steel
GB/T 3765 Specification for bite type tube fittings
GB/T 3766 Hydraulic fluid power - General rules for the application of
equipment to transmission and control system
GB/T 3768-1996 Acoustics - Determination of sound power levels of noise
sources using sound pressure-survey method using an enveloping
measurement surface over a reflecting plane (eqv ISO 3746)
GB/T 5653 Flared couplings - Specification
GB/T 5972 Wire ropes for cranes - Code of practice for examination and
discard (eqv ISO 4309)
GB/T 6074 Leaf chains, clevises and sheaves The dimension of the metal oil tube and the tube joints shall comply
with the requirements of GB/T5653 and GB/T 3765.
5.1.3 Mechanical transmission portion Wire Rope The lifting wire rope shall comply with the requirements of GB/T 8918
and GB/T 5972 OR use the product of equivalent above quality, AND it is
recommend using the wire contact wire rope, with the safety factor of more
than 7 times the maximum static tensile force. The breaking tensile force of the wire rope end and the wire rope end
fixing device shall be more than 7 times the maximum static tensile force. Chains
The chains used in the lift shall comply with the requirements of GB/T 6074 OR
use the product of equivalent above quality, with the safety factor of more than
5 times the maximum static tensile force. Pulley The ratio of the diameter of the pulley to the diameter of the wire rope
shall be more than 18. The pulley shall have a means for preventing the wire rope from
jumping out of the rope groove.
5.2 Welding
5.2.1 The welding surface shall be flat and uniform, it is not allowed to have
such defects as cracks, welding penetration, loose weld, missed welding and
so on, AND it shall comply with the requirements of JB/T 7949.
5.2.2 The bearing parts of the lift structural member AND the periphery of the
column bottom of the single column lift and double column lift shall be
subjected to photographic spot testing in accordance with the requirements of
GB/T 3323.
5.3 Coating
5.3.1 Before coating, it shall conduct the decontamination, degreasing, and
rust treatment against the metal surface.
5.3.2 The coating surface shall be uniform, smooth, and strongly adhesive,
AND be free from base exposure, fracture, blisters, or apparent flow mark and
orange peel.
5.4 Appearance
The appearance of the lift shall be clean AND free from such defects as crack,
burr, metal surface exposure, and so on.
5.5 Whole machine performance
5.5.1 Synchronizer
The lift having more than two lifting platforms and brackets shall be equipped
with the device to keep synchronous lifting, AND the asynchronism of lifting up
and down of the lift within the effective working travel range shall be less than
5.5.2 Electrical systems The electrical system of the lift shall be fitted with a circuit breaker in
accordance with the size of the load, AND the motor control shall have
overload and phase-loss protective device. If the lift is equipped with lighting device, it shall use the safety voltage
of less than 36V, AND its power shall be separated from the dynamical power. The color of the indicators, buttons and conductors shall comply with
the requirements of GB/T2681 and GB/T2682. The operating device complies with the following requirements.
a) The operating device control power supply shall use the safety voltage of
less than 36V;
b) It shall have automatic shutdown device which acts when the lifting
platform or bracket is lifted up or down to the maximum travel positions;
c) As for the operating devices which are used to control the lifting up and
down shall, in principle, adopt the working method of “stop running
immediately after hand off”;
d) If the working method of “continue running after hand off” is used, when
the lifting platform and bracket are at the lowest position and the
maximum lifting height position, such continuous function shall be
automatically relieved. Meanwhile, the equipment using the working
method of “continue running after hand off” shall be equipped with
emergency shutdown device. The electrical system shall have good insulation properties, with
insulation resistance not less than 5MΩ. The electrical system shall have a reliable grounding device and a clear
grounding mark, with the grounding resistance not greater than 4Ω.
5.5.3 Safety devices
MAKE the lifting platform and bracket at any position; USE the level to
respectively set the millimeter level original position mark on the lifting platform,
bracket, and column; USE the stopwatch for timekeeping; USE the scale plate
to measure the lifting and descending distance of the lifting platform and
bracket which is lifted up for 30s and down for 20s under the rated lifting
capacity, AND the asynchronism value shall comply with the requirements of
6.4 Electrical systems
6.4.1 Insulation resistance
USE the 500V insulation resistance meter to measure the insulation value
between the two conductors which are separated by the insulation material,
which shall comply with the provisions of
6.4.2 Grounding resistance
USE the grounding resistance meter to measure the resistance between any
conductor part of the external conductor terminal and lift AND the metal
enclosure, which shall comply with the provisions of
6.4.3 Operation device action As for the inspection of the operation device of the “stop running
immediately after hand off” operation method; after hand is moved off the
operation device, CHECK whether the lift is able to stop lifting up and down
operation automatically. When hand is not moved off the operation device,
CHECK whether the lifting platform and bracke...
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.