Re: Case snowcaster/snowblower
Before you get rushed to the hospital upon hearing the price for a new blower, I want to make sure that you fully understand the following.
All Case and Ingersoll branded tractors that have 3 digit model numbers (224, 226, 444, 446 etc) use snowcasters that begin with a letter such as H, J, K, L etc, followed by either the number 80 or 84.
Ingersoll branded tractors with 4 digit model numbers such as your 4020 must use snowcasters that begin with the letters SB followed by two numbers that indicate the true cutting width.
So, to answer your original question as to whether a snowcaster off a 226 will fit a 4020, the reply is "Yes it will FIT but it won't work properly."
In order to make the earlier snowcasters work correctly on a 4 digit tractor, you must do one of two options. Either buy the outrageously over-priced conversion kit from Ingersoll ( $650.00, if IIRC) and install it or modify the mule drive on the snowcaster yourself. This is all about getting the early snowcaster to spin in the correct direction since the engine in your 4020 faces the opposite way to the engines in the 3 digit models.
So... if you buy the blower from the 226, you better have the tools and skills to cut off brackets and weld them in a different position. If not, then buy a SB-48.