7) 7) DISASSEMBLY OF THE PORT PLATE DISASSEMBLY OF THE PORT PLATE · Note dimension X · Remove Q min screw · Swivel rotary group to zero P X Q min screw (1) Port plate. Mark position. Loosen screws. Removal. (2) Check O-ring. Stick new O-ring with some grease. Do not swivel rotary group. Piston rings to hang out from the cylinder boring. 7-42