Includes1-AR49238 & 3-AR4945MODELS : Engine Parts > 301 CID Gas John Deere TRACTOR: 4010 (GAS EXCEPT W/ BLOCK Number R40940 & R49550) Engine Parts > 340 CID Gas John Deere INDUSTRIAL/CONSTRUCTION: 600 (SN < 214999) John Deere TRACTOR: 4000 John Deere TRACTOR: 4020 (GAS SN < 200999).. more.