Pto Clutch Release Sleeve.  Fits: Oliver Super 55 & 550.  Replaces ES1671. #105395A.  If replacing on a Super 55 or a 550 that has 4 & 5 clutch plates, you will also need 3 of 10P2663 pin & 6 of 702861 link. If replacing on a 550 that has 5 & 6 clutch plates, no other items are needed.