Oil Jack broke

Long used KAYSBA Scissors oil jack fell in to being out of order at last, small and vulnerable construction as KAYABA handy pantograph on is, it has been working well supporting weight partially. Small iron ball and copper oil pressure sealing washer are the fundamental one way valve construction. deforming of this tinny thin piece of sealing material was the criminal of dysfunction. Repeated too much tightening torque applied on the rocking screw might have caused this trouble.
I make it a rule to apply thin aluminum washer in addition when brake hose conjunction portion leakage was found especially loosened and re-tightened occasion. By the way, this is made from aluminum beer can material.  I did it the same procedure on both sides that had been distorted by violent handling.  The result was so favorable and I ascertained it's original performance by repeating high-up and low-down activation for included bubble extraction. This small jack would continue playing a good part in case of necessity in some closed space.