Rebuilding a Hydraulic Floor Jack: 19 Steps (with Pictures) Dec 11, 2014Rebuilding a Hydraulic Floor Jack: This is a 1 1/4 ton hydraulic floor jack my father passed on to me. He bought it new during the 1970s. It began to leak down a little a few months ago. The lift arm no longer rises when the handle is pumped up and down. (I was able to pull the li..[PDF] Hydraulic Floor Jack - Shinn Fu America Labels and owner’s manuals are available from manufacturer (see page 7). SAFETY AND GENERAL INFORMATION 2 PRODUCT DESCRIPTION Hydraulic Floor Jack is designed to lift, but not support, one end of a vehicle. This Jack must be used in conjunction with a pair of appropriately rated jack stands. NEVER use a hydraulic jack as a stand-alone device.