The expander spacer is a segmented split ring. It is flexible when not in place. It is put into the oil ring groove of the piston first. The ends of this expander spacer are butted together. At this point the expander Spacer tries to get out of the groove, and is a bit unruley. A rail is next wound onto the expander, to the top of the groove, carefully assuring that it is sitting on the ledge formed by the expander spacre segments, and its end gap 90 degrees away from the butted ends of the Expander spacer. Next the lower rail (they are the same, this just refers to its position) is wound into the groove at the bottom of the groove. Again this is resting on the ledge of the expander spacer. The resulting tension on the rails from the expander spacer fills the groove, and makes the rails pretty hard to move with your fingers when the piston is out of the cylinder. The ring compressor needs to be good to compress the rails evenly as they are pushed into the bores. If the system as is has loose expander spacers and loose rails, it will burn oil. JimN
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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