What is a four -point jack?
Four-Post-Pound is a device found in many garages and car repairs. It is used to lift the vehicle from the ground to allow the mechanic to be able to serve under the vehicle. The vehicle is powered on the ramp and the mechanic initiates the vehicle increase by pressing the switch that drives the lifting motor. Unlike a typical hydraulic jack, which is mounted on a single cylinder rising from the floor, the four -point jack uses an electric motor and cables to increase the ramp or platform. Once the engine runs, it turns the coil that wins the cable and effectively increases the ramp. With a typical hydraulic post jack, the main hydraulic cylinder is installed under the garage floor, which requires significant excavations. The four-post-lifting is made of parts, in the garage and usually works in a single day. While the ramp raises with steel cables, the ramp and the vehicle are supported by a blocking mechanism that is able to support the vehicle, even if the cables should break. This makes a four -point jack for a worker under the vehicleme safe.
One problem with the design of a four -point jack is in the way the vehicle is raised. Parking the vehicle on the ramp is not removable after the vehicle increase, making certain repairs on the jack. Many times the vehicle must be on the ramp and the vehicle placed on the stands. This allows tires to be removed when the vehicle is in an increased position on the jack. Although it is not impossible operation, added steps when lifting the vehicle before lifting the jack are often a reason to buy another style of jack for some mechanics.
Another disadvantage of a four -storey jack is the electric life of the engine. This engine requires the electric current to increase and reduce the ramp, creating a problem during power outages. With the hydraulic jack, the pressure can be released from the hydraulic cylinder in the event of a power failure, allowing the jack to reduce. A positive aspect of a four -point jack is its capableST use inside and out. Lifting can be placed on a cement pad and used in the outside of the garage to allow an extended repair area in any store.