Glenn -- The 101, 30, 33, 333, 44 and 444 all use the same rear axle bearing and seal setup. You shoud be able to pull the axle without pulling the rear axle housing. You must remove the large cotter pin that hold the large bull gear on the axle. Remove the wheel and hub from the axle. Remove bolts that hold the axle bearing cap onto the outside end of the axle housinf and pull / push the axle out. The axle is not pressed in but may be stuck. If you have the axle housing and axle off the tractor you should be able to push the axle out without a lot of force. The outside bearing and bearing cup will sta;y on the end of the axle. The inside bearing and cup will stay in the housing and is held in with a large snap ring. The snap ring would need to be removed to inspect or replace the inner bearing. The bearings are Timken or tapered bearings. There should be a number of bearing cap shims on the bearing cap. They may look like a metal gasket. I think they come in .005", .010" and .020" thickness and usually will have a number of them on the bearing cap. A common error is someone will add a gasket in an effort to stop any oil leak,but this effects the bearing clearnce or end play and causes the seal to leak. If the bearing is good, the right number of shims will give you no end play but the axle will turn freely. As the bearing wears or is replaced the bearing clearance needs to be adjusted. The problem is finding new shims if you need them. If the bearing is OK and just loose, you can remove some shims. If you replace the bearing you need to check the bearing end play. The outside rear bearings should be paked with grease before installing. There should be a cup washer (Grese Retainer) that goes on the axle before the outside bearing goes on the axle, then the bearing and bearing cup. Massey also used a felt washer on the outside of the seal to kept dirt out of the seal. There is a grease fitting on the axle cap, as it may not always get transmission oil to the outside bearing. (as the land side wheel when plowing or if the trans / rear end oil is a little low) Also make sure the bearing cups are seated before adding or removing shims. The axle should not have any play but should turn free.
The same thing is true on the brake shafts and seals. The bearing are tapered and clearance is adjusted with shim. However moving shims left to right, or right to left side also adjusts Ring Gear and Pinion back lash. It's best not to change the back lash as the gears have a wear pattern and unless there is a problem don't cchange it, but the bearing end play needs to be correct for the oil seals to work correctly.