Liftall Operation
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The International Harvester Liftall was their early version of a hydraulic system for farm tractors. An amazingly robust system - Mr. Haney's works perfectly well after running for years with only a dried up scum oil for lubrication. It's not a "live" system; it only supplies pressure when the clutch is engaged. But it will work anything that has a hydraulic cylinder attached.
A couple of people, more familiar with modern hydraulic systems, have asked how the Liftall operated, so I copied these images from the IH Liftall Service Manual (CHS-68, Dated 6-1-47). They are diagrams of the Liftall pump and attached cylinders that show the system at various conditions.
Liftall12.jpg (144568 bytes)
Liftall13.JPG (157668 bytes)
Liftall14.JPG (135814 bytes)
Liftall15.JPG (125917 bytes)
Liftall16.JPG (143400 bytes)
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