The 4000 series is a little larger. Hoods are about the same, in fact the same hood is used on the 3x20 and the 4x20 series, but wheel bases and tire sizes are different, the 4000 series being larger and higher.
The only difference in the 3x20's (3120 to the 3720) is engine hp.
Rob
I think he is referring to the older 4xxx (like the 4200, 4300, 4400) rather than the new 4x20 series.
I've been looking at covers for my 4300. I see some nice canvas covers tahat cover the main body of the tractor that are called Large cover for compact tractors and fit the following models: 2320, 2520, 2720, 3120, 3320, 3520, 3720, 3203 and 4105. I think the 3720 is close to the size of my 4300. Anybody know how the size of these models relates to the 4300 and therefore if the cover would fit?
I think he is referring to the older 4xxx (like the 4200, 4300, 4400) rather than the new 4x20 series.
Ken,I'm sure you meant to say 4x00 instead of 4xxx since 4xxx includes the 4x20 that you were excluding.