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When is the exact time to replace your lifts?

2024.08.25 8
At present, there is no clear regulation on the service time for car lifts. However, for safety concern, we need to know when we must replace old lifts with new ones. Maintenance frequency, original structure stability and working conditions are main factors that affect the span of servicing life.
 
It is known to us that regular maintenance is crucially important to prolong the service life. This can explain why lots of EAE lifts which have run more than 10 years are still running with good performance at end users’ workshops.
 
Nevertheless, we feel obligated to say potential risks in the following.  
 
By consulting with the regulations on design and life limitations to engineering machinery, if a lift has been used for ten or over ten years, its main mechanical structure and other load bearing components are working at highly risks of danger because of accumulated wear and fatigue deformation. Regardless of very high maintenance cost, such lifts are hard to restore its technical performance and safe use cannot be guaranteed. In such cases, we highly recommend replacing with new lifts.
 
Replace the old lift immediately, in case one of the following symptoms occurs.
 
 
Section1, Informative advice on replacing scissor lifts.
 
To the scissor support arms
 
The arm was twisted and deformed with deformation being more than 1.5mm;
The hole that connecting two scissor arms with shaft was deformed or out-of-roundness. For instance, it has been 0.5mm larger than the original size.
The welding parts on arm were cracked or had cracks and the original size could not be guaranteed through repair welding.
Fatigue damage or a deformation is more than 1mm at the supporting position of the arm’s central load bearing components.  
 
To mechanical safety latches and connections
 
The safety latches cannot be fully engaged or the clearance after engagement is more than 1.5mm;
The connection hole is abraded. The clearance is more than 1 mm larger than the original clearance;
Connection plate of the upper locking block has a deformation being more than 1.5mm;
There are cracks at the connection position of the latches.
 
To the load bearing platform
In normal use, try to let the load be evenly distributed on the lifting platform and under load inclination shall be less than 1 degree.
Level deviation of the supporting platform shall be less than 5mm. Platform deformation shall be less than 3mm. If not, repair or replace the platform.
Tracks for sliding blocks or rolling wheels shall be clean, flat and with no symptoms of damage.
The shaft fits well in the hole of the support holder. Abrasion in the hole at one side shall be less than 0.5mm.
The limit blocks for load bearing shafts shall be reliably welded. Inspect the reliability of circlips, set screws and clamping screws for parts related with the shafts.
 
 
Section 2, Informative advice on replacing post lifts  
 
Replace the steel wire rope upon the following conditions.
The number of broken wires is up to 10;
The radial corrosion or wear to the rope has reached 30% of its original diameter;
Used for more than 3 years or more than 6000 cycles.
 
The tracks for load carrying devices
Normally, its service life is 8-10 years.
The maximal wear on the working face of the track has reached to 0.5 mm.                         
Drooped swing arms caused by too big fit clearance between the post and the carriage.
There are cracks on the welded seams or cracks on the bending positions.   
 
Support arms
Normally, the sagging deformation of the arm shall not be more than 1 degree.
Used for 8-10 years .
There were cracks or tearing signs on the very front section of the arm.
The hole which mounts the shaft used for connecting the arm and the carriage is deformed. The fit clearance is up to 1mm.
 
Mechanical safety lock
Wear or deformation occurred at the load bearing position of the hook.  
The hook has been used for 5 years.
Unable to return to the default position or unable to be engaged.
 
Bushing of the pulley
At present, there is no clear regulation on in which circumstance the lift needs to be replaced. It depends on factors like the maintenance frequency the stability of the structure itself and the using environment.


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