ORings are typically called out by the inner diameter of the torus and the diameter of the round crosssection Thus, for an AS size 70 shore A, Nitrile would be 0239 x 0070 70 BN ORing Sizing GuidesThe ORing is one of the most basic and functional seals ever made and is the backbone to all the hydraulic and sealing applications in the world An ORing is a solidrubber seal shaped like a dough nut or torus When compressed between mating surfaces, an O So far only way I can see is to order a special liner puller J at a cost of $948 plus shipping Did try using the crankshaft to push against the pistons which didn't work Was able to hold postion but I think the crank was trying to push more sideways because with tremdous force on the front of the crank it didn't budge
J 45876 o rings