YZ18984 - AXLE Select model YZ18984 - AXLE John Deere: 644J Loader (S.N. 611232- ) 644K Loader (S.N. -642443) (Engine 6068HDW80, 6068HDW83) 724J Loader 724K Loader (S.N. -641522)(Engine 6090HDW03, 6090HDW09)