hi to all the helpful sages here. looked up hydraulic jack repair for instructions and how to repair videos. they were helpful but none had a sears jack like mine. did learn some about the repairs though. the2 videos from you tube suggested by a poster here were not able to be raised. looked at one on the list which explained some things. went to sears store here and had agent lookup my jack - couldnt find the exact one but found a similar one- no rebuild kit is available nor is thekey part which is called the power unit. this is probably because it is a 1973 model. would like to fix this one if i can.will try a farm store. still searching for a hydraulic jack repairer. the power unit has the ram in the front and the pump valve and release valve in the back. went to hf here but their jack is only warranted 90 days unless you buy a 2 year extended warranty. worried about their parts availability if jack craps out. last ditch may be to attempt to remove the pump valve and replace the orings and seals. the front of the ram is not leaking so that part of it must be ok. too bad such a seemingly simple thing is so complicated. seems like a waste to junk it. thanks tons oldduke