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Monday, 22-Jul-2013 03:57 Email | Share | Bookmark
Car Lift Safety Features

There's no one way to make a car lift or truck lift safer for the operator. Manufacturers of high-quality automotive lifting products are always looking for better, more secure lifting methods. As a result, many excellent automotive lift safety features are now offered to the consumer. Here are just a few examples of the great technological strides that reputable ALI / ETL certification partners have developed to keep you and your employees safe.

Because the various car lifting solution designs can be extremely different from each other, it makes sense that some safety features are specific to only one kind of car lift. Two-post car lifts employ swing arm assemblies that allow the operator to change the arm configuration to suit a wide range of vehicles. It is important that swing arm lifts employ restraint devices to prevent arms from shifting or dislodging after a car or truck is already mounted and raised. Higher-quality two-post car lifts will feature this safety critical element; typically a gear mechanism that automatically secures the arms into place whenever the lift begins to rise. The automatic gear arm restraints will only disengage again when the lift is in a safe, lowered state.

Four-post car lifts are principally suspension lifts that rely on their columns to contain the lifting structure via cables or chains, while simultaneously bearing the load equally between them. Since the four-post car lift is not a rigid structure, it was once common for lifts to sway slightly during raising or lowering operations. Anti-sway blocks are one method of minimizing sway and maintaining proper spacing. This is especially important to ensure that safety locks are always engaged and that each post or column is holding 1/4th of the overall weight.

Be sure your auto lift is equipped with manual wheel chocks as the primary means to restrain vehicles from inadvertently rolling off either end of the runways. Automatic stops on the approach end and fixed stops up front should be provided on runway lifts as a secondary means to restraint.

Hydraulic car lifts that are designed with safety in mind use specialized hydraulic flow restrictors or velocity fuses integrated into the hydraulic cylinders or hydraulic circuit to control sudden, rapid decent in the event of a hydraulic component failure. These essential safety devices can dramatically reduce or stop downward travel in a free-fall situation due to a hydraulic system failure other than the cylinders themselves.

Pinch points are not just mere annoyances like the name might suggest. Without supervision and careful operation, pinch points can result in damaged property and injury. Reputable manufacturers employ engineers to help identify potential pinch points for hoses and limbs, and then they remove them from the design of an auto lift.

These powerful load-holding devices automatically engage and lock the lift structure as the car lift raises, preventing sudden free fall in the unlikely event of a suspension component failure. Typically, after the lift is raised to the required working height, operators are instructed to lower the lift until it is resting safely on the locks to minimize wear on suspension components. Once the locks are engaged, the car lift has to be raised slightly in order to release the safety locks. Load-holding devices should always require an independent and positive action for release, and they should always engage and reset automatically each time the lift is raised.

As a redundant safety precaution, all professional-grade car lifts that employ either cable or chain suspension methods should incorporate a slack cable or chain device. These slack cables act as an automatic brake for the supported structure if a suspension component breaks or slackens.

When searching for a car lift, always ensure the manufacturer has a written quality assurance system of policies and procedures that are implemented and managed by quality control personnel. Vans and trucks require different adapters than cars and motorcycles. The dealer or manufacturer should have a variety of options and accessories to help customize your automotive lift to fit your specific auto lifting needs. If they don't, take it as a sign that their car lifting products might lack the proper support.

Always be sure that your car lift is supplied with operation, inspection, service and maintenance instructions that include specifications of the lift, lift rated load capacity, significant lift and bay dimensions, power requirements (compressed air and/or electrical), foundation and floor structural requirements. Car lift installation instructions should be clear with graphics illustrating full step-by-step assembly, exploded drawings with part numbers and descriptions, component packing list, site requirements, mounting and anchoring instructions, recommended clearance around and above lift, plan and elevation details of auto lift layout, final pre-check procedure for assembled lift, operational test inspection and maintenance instructions.

Few of us are able to determine the strength, quality and safety of a car lift just by looking at it. Metallurgy, tensile strengths, mechanical engineering, manufacturing quality and electrical compliance are just a few of the things that these testing laboratories investigate rigorously for every car lift or truck lift that applies for certification.

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