Hydraulic hooklift hoist

Hydraulic hooklift hoists are mounted on heavy duty trucks to enable hauliers to change out flatbeds, dumpster bodies, and similar containers. Primarily used in conjunction with tilt frame bodies and specialised containers, generally designed for the transportation of materials in the waste, recycling, scrap and demolition industries.

The system employs a series of hydraulic rams to hook, lift and hoist the container onto the chassis of the truck. There are several configuration options, and strict guidelines which must be followed to ensure that the container is secured on the truck in transit.

Lift and dump capacities of hydraulic hooklift hoists typically range from 8,000 to 68,000 lb (3,630 to 30,800 kg). Generally a hoist is capable of lifting (off the ground) and dumping (onto the ground) the same maximum capacity, although there can be exceptions where short wheel bases are involved.

The ratio of container length to chassis length is a factor in achieving rated load capacity. This ratio determines the load angle, and all hooklift hoist systems indicate a recommended range of body lengths, typically 3–5 ft (914–1,524 mm) difference in length between the container and the chassis. Container bodies shorter than the recommended length produce substantially steeper load angles, and consequently lower load rating, than those of the longest bodies intended for use with a particular hoist.

Chassis frame height is also important, as the lower the chassis frame height, the lower the potential load angle. A combination of low chassis with the longest recommended body lengths offers the best case.

Finally, hook height has an effect, as a taller hook height achieves a greater lift and dump capacity.

The hydraulic operating pressure of all hooklift hoists are preset at the factory to achieve the intended lifting capacity for the design application. The original approach used by early European models, still widely used today, was a high pressure / low volume system. This setup suits chassis with space restraints, allowing for use of a smaller piston pump and a smaller hydraulic reservoir. Such systems operate between 4,000 to 5,800 psi (28,000 to 40,000 kPa).

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