> If the cylinder is allowing fluid to pass around > the packing on the piston, the fluid simply > moves from one side of the piston to the other, > allowing it to sink back into the cylinder.
As the piston sinks into the cylinder the shaft follows it, taking up some of the space formerly occupied by oil. Draw a lengthwise cross-section of a fully extended cylinder and a fully retracted one. Compare the two drawings and it will be obvious that there is less room for oil in the fully retracted one. Thus in order for the cylinder to retract some oil must leave it.
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Today's Featured Article - More Memories of a Field Service Engineer - by Brian Dye. Introduction: The author worked for one of the largest Ford tractor dealerships in England as a trouble-shooter on tractor engines, hydraulics and combine harvesters from 1963 to 1972. In 1972 he became a dealer manager and finally left the dealer net in 1975 to run his own electronic design and manufacturing company. [Editor] We live right in the middle of Norfolk. The dealership that I worked for sold Fordson Tractors from the 1920's and some of t
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