1 177-2503 [7] PISTON AS. 12 113-4420 M [14] SCREW (M6X20-MM). 2 177-2502 [1] PIN. 3 188-4097 [1] BARREL. 19 095-0928 [1] RING-RETAINING. 18 177-2500 [1] BEARING. 12 188-4103 [1] BEARING AS. 11 188-4102 [1] SHAFT.