We have an 8430 and I would say the day to day stuff is pretty easy to service. The hinge area with the U joints is something I would rather not do but all in all is not a bad job plus it is an area that you do not want to neglect. It's a 10 hour service interval but there have been times it has gone past that a few hours but no harm done. The U joints take 10 shots of grease apiece. Easy to overlook are the front pins that have a grease bank over by the engine filter area on the frame rail. You have to probably stand on the drawbar unless you are real tall to add hydraulic fluid to the transmission. The front axle is not "common" with the main transmission but the check plug is easy to get at plus important to monitor if roading a lot such as with a manure tanker. The engines are not perfect in the 30 series articulated tractors but it is real important not to oscillate the front axle to where it comes hard against the stops on the frame rails as it creates stress on the engine block. We have had a 5o series engine in the tractor that was a factory new unit and consider it a vast improvement over the original engine.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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