Hydraulic lift system and method for retrofitting

Abstract

A high pressure, low volume hydraulic lift system and a method for retrofitting a low pressure high volume lift system are provided. The lift system includes a low pressure high volume (LPHV) casing within which is mounted a high pressure ram. The ram is equipped to move a plunger in an axial direction with respect to the casing, without the need for any further reinforcement of the existing casing. The method for retrofitting is effected by removing the pre-existing structure of the LPHV system, cutting a hole in the upper portion of the pre-existing casing, and draining all hydraulic fluid. Thereafter, the pre-existing gland flange and plunger are removed. A high pressure low volume hydraulic cylinder and associated hydraulic line, are then installed in the casing of the pre-existing system. The bottom of the high pressure hydraulic cylinder is mechanically locked to the base of the pre-existing outer casing. The hydraulic line is attached to a new hydraulic compressor and a new plunger is added to the new hydraulic cylinder and, with it, an appropriate bearing and guide mechanism that uses the pre-existing casing as an outer guide means for the new plunger. Once the hydraulic ram is installed, any holes cut in the slab are filled with concrete. The lift system and method may be adapted for any type of pre-existing LPHV, such as that used in the automotive industry or in elevators. When used in connection with an automotive lift, the pre-existing superstructure is then secured to the top of the new plunger and cylinder structure.