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Again, we do not recommend deleting the DEF system unless you are absolutely sure that you will never need it and that it is legal in your state or country. It doesn't matter who does the work either, if I change the oil on it and don't correct the emissions system before returning it to service they can fine me. For example, the Kubota RTV 900 uses hydraulic oil, while the Kubota BX23S uses diesel fuel. Once these parts are removed, you will need to have your ECU flashed or tuned so that it does not look for these parts. Best practice is to pour directly from the DEF 2.5 gallon container. That said, none of the LS tractors engines require diesel exhaust fluid (DEF) to meet EPA standards. Kubota 75-100 horsepower series diesel engines were certified in September 2014 as Tier 4 final compliant. There have been multiple measures implemented to prevent diesel engine fuelfrom being pumped into the DEF tank and vice versa. Your chores are going to start feeling a lot more like leisure. Read about Snow Removal: What Implement to Best Handle Winter. Just like the parent company, TYM, high-horsepower Rural King (RK) tractors are EPA tier 4 final compliant. At the 2014 New Product Intro, John Deere claimed fuel consumption (fuel + DEF) for these tractors to be a 2.0 percent improvement over the previous generation machines and up to 6.0 percent when equipped with e23 transmissions which maximize economy. Yeah, the 2010 ISB was able to meet the new EPA emissions specs in at oeast some configurations without using an SCR-DEF exhaust system. Active Start for AC unit. Total:1,245 (members:43, guests:1,202). If youre a Kubota M5-111 owner, you may have experienced some problems with your tractor. Would all this come without a cost? The good news is, Kubota tractors use very little DEF. There are very few cons with DEF as it is a fairly simple procedure to deal with. The tractors in these series use an SCR system, where the exhaust is doused with DEF to help further reduce NOx. The engines are built with performance in mind first and then the SRC, DPF and DEF remove what is needed as an afterthought. I wonder if this has something to do with the issues some people are having in extremely cold temperatures, with the new engines. Even their 19-55HP series tractors are powered by EPA Tier-4 compliant Yanmar diesel engines. However, not all Kubota vehicles use DEF fluid. The RK74 engines are all EPA Tier 4 compliant. Every single DEF package has a manufacturers date located somewhere on the product. However, this new innovation also comes with one key disadvantage that makes some tractor users somewhat sceptical. The engine may overheat due to a failed cooling fan. Urea was first discovered in urine by Dutch chemist Herman Boerhaave in 1727. If youre experiencing any of these issues, its best to take your tractor to a qualified mechanic for servicing. The concept is the same across the board: the urea mixed with heat creates ammonia that causes a chemical reaction that reduces NOx by 70%-95%.