18-03-2014, 12:04 PM
HYDRAULIC LIFT
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INTRODUCTION TO LIFT
Car lifts are generally the most affordable type of lifts and most often for mechanical work. Car lifts are usually made from high quality steel and includes two main structural posts and an overhead post, Usually a car can be driven through and lifted easily from ground up. It should be noted that the car lift is off center with two posts usually located right after the front wheel and situated before the front door af the vehicle. From each post arises two arms in the shape of a ‘V’ that effectively lift and lower the vehicle.
Car lifts are generally made for amateurs tomwork on their vehicle. They are usually powered by electricity. These lift arms effectively work fully in less than one minute time. Most car lifts are made for small vehicles weight less than 7000 lbs . they fit nicely in almost any garage and most kits can be purchased with slight modification to fit in a smaller size garages of space. Most of car lift require base assembly which is fairly easy, but usually requires at least two to three persons to set up. It should be noted that these car lifts are fairly heavy weighing in at about 1500 pounds
Two Post Lifts
Particularly suited to fast service work, widely used and universally accepted, two post lifts offer a space saving way of lifting vehicles up to nearly 6.5 tonnes and provide a high degree of underside access. Since they are surface mounted, they can be cheaply and easily installed into most workshops provided there is a good floor. Generally, two post lifts are either electro-mechanically or electro-hydraulically driven. The electro-mechanical or ‘screw type’ are usually cheaper but tend to suffer from high operational costs, average reliability and depending on quality, a modest life span.At the opposite end of the scale, lifts that are purely electro-hydraulic – that is to say they use rams rather than cables, chains or other mechanical components within the load bearing system, are usually more expensive at the outset but are inherently reliable, virtually wear free, cost little to operate and have a very long life.
Four Post Lifts
The four post lift, by virtue of its design, offers a stable lifting system for most types of vehicle. Usually hydraulically powered, it is the most cost effective way of lifting a vehicle in a wheel support fashion. However the design is not particularly space saving and the platforms can get in the way of work. Although used extensively for MOT installations, it has largely been replaced by the cheaper and ergonomically superior two post lift for routine service work. The capacity of a four post lift varies upwards from 3 tonnes.
The hydraulically operated ‘in-ground’ or cassette lift is the pinnacle or workshop lifting equipment. By employing two vertical rams, to lift through either platforms or an arm system, it is possible to achieve almost complete access under a vehicle. They are also ideal where work bays need to be narrow. Models up to 5 tonnes in capacity are available to lift most types of car and light commercial vehicles and meet virtually any requirement from fast service through to tyre and exhaust work. Smooth and quiet in operation, rugged, reliable, low operational and maintenance costs and a tidy appearance are just a few of the features that make these lifts the ultimate choice.