I have a Craftsman 4-ton jack (50156) that slowly leaks down. Sears does not show any parts available for this model.
I have replaced the oring on the lock valve shaft several times. The oring appears to fit snugly to the valve shaft and bore. However the lock valve appears to seal by forcefully closing off an opening at the bottom of the valve port. This looks like a metal/metal seal that would not be repair-able easily (machine new seat?). I hate to throw away a good jack and was wondering if anyone had a repair suggestion.
thanks
I have replaced the oring on the lock valve shaft several times. The oring appears to fit snugly to the valve shaft and bore. However the lock valve appears to seal by forcefully closing off an opening at the bottom of the valve port. This looks like a metal/metal seal that would not be repair-able easily (machine new seat?). I hate to throw away a good jack and was wondering if anyone had a repair suggestion.
thanks