Getting the drum and blades off a brush hog got into this one time with a smaller one a little 6 ft model. Took everything loose and it should be hammered cusp pulled nothing can get the drum off the shaft is kind of tapered. Finally put the nut back on loosely fired up the brush hog and lowered it down on a stump and let it bang around and sure enough it came right off the.
Now that was set up with shorter blades and a drum considered a stumpjumper. If yours doesn't have a stump jumper it might not be a good idea don't know that would be for you to size up and decide.
Jock it also try heating it up get it good and cherry red cool it up with a cold garden hose right quick and put the hammer to it kind of like popping a bearing off after you heat it.

Last edited by ldholton; 08/11/22.