Abstract: Therefore it may be seen that the present disclosure includes the description of a system, particularly the First System 100, which include advantages over the known prior art by providing a wheelchair ramp subassembly which includes the use of internal hydraulics, such that the subassembly can use its own hydraulics which do not need to be shared with other hydraulic units on the supporting vehicle. This provides an apparatus that includes improved operating characteristics, tends not to be contaminated through shared hydraulic connections, and can operate conditions in a manner not possible if connected to a shared hydraulic system. An improved bushing 1005 is also provided.