The 4000 Ten series are done. Deere replaced them with the Twenty series. Since you are talking about a 4310, the new model equivalent would be the 3320. The 3000 Twenty series goes up to a turbo charged 44 hp model. The new cabs for the 3000 Twenties will be for the 3320-3720 models. The small chassis 4000 Tens (4010, 4110, 4115) have been replaced with the 2000 Twenties (2320 (23hp), 2520 (26hp)), the mid chassis (4210, 4310, 4410) have been replaced by the aforementioned 3000 Twenties (3120 (29hp), 3320 (32hp), 3520 (37hp turbo charged), 3720 (44hp turbo charged)), and the large chassis (4510, 4610, 4710) have been replaced with the 4000 Twenties (4120 (43 hp turbo charged), 4320 (48hp turbo charged), 4520 (53hp turbo charged), 4720 (58hp turbocharged)). The 4000 Twenties will also have cab options available soon.
