I got both brake cylinder pistons freed up. One of the return springs was broken into many pieces. I called Westinghouse Air Brake. Sadly it took 3 or 4 calls and return calls to find someone at WABTEC to research our brake piston cup and spring. Finally I got to Michelle in Chicago who found the part numbers for our 8 inch cylinder. The bad news was that there was a minimum order of 12 pieces at 60 dollars a piece. I called Bill at Pittsburgh Air brake. He pretty much fixed us up with 2 new piston cups and a spring. I made 4 each, eleven inch flange gaskets from a 12 x 24 sheets of neoprene from McMaster Carr company.
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