I just bought an old Yale lift that Yale dealers in El Paso and Amarillo cannot identify. Here is the nameplate data: Model G51P- 030-CRS; U.L. Type G; Serial Number P-159134. Capacity 3000. I am trying to repair the brakes, but the above dealers cannot cross-reference the oil seals, brake cylinders or brake shoes. Can anyone advise what year lift this is, and where I might find parts for it? Thanks, Chuck