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upping the horsepower on tractors

S

Shane-o-mac

Member
Hey all i have a friend that wants to up the horsepower on his compact tractors the 4320 and the 4720 how do they get the hp differances? Would this type of injection pump be an inline i think it would be. How do you adjust it to get more hp out of the engine on the injection pump? I know that you can increase the hp at the pump but i dont know which screw to turn in or out and whre thats located at. Or can he swap out the injection pumps etc from one tractor and put it in the other tractor?
Thanks for your information, Shane.
 
DON'T Mess with it..... They are computer controled. I know. I've owned the 4100, 4200, 4300, 4400,4500,4600 and 4700. Can't wait until my 5425 is paid for. Then will look for a Mc Cormick or Heaven forbid a Kubota or New Holland (nothing but electronic problems).
 
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.
 
If you want more power get a bigger tractor don't mess with a good tractor engine is designed to produce so much HP you will shorten the life by jacking HP up.
 
We also had a 3120 just the same as a 4200, Never had the first problem, was always overloaded, The 4320 is just the right size for what we want to do with it. The 3120 was to small.
 
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