We have a compact 4320 It is a 2010 year, I wanted to do the same, Our engine is a common rail fuel system ( just like a old Detroit system) There is no computer in our system, The only difference between a 4120 4320 4520 4720 is the part no on the unit injectors. To upgrade to a 4720 (66hp) injectors cost about $1800 nor counting Labor to install them. The book did say there was 3 different engines, Our serial Number didn't have any electronics.on the engine. It is a Ehydro has electronics on the hydro. After a few hrs doesn't seem to need any more hp to do what we do with it.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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