The locking collar has to come off before you can get the bearing off.
Then the other retainer will come off, but the carriage bolts will fall into the case if you are not careful. The collars are eccentric's and need to be rotated on the shaft once the set screws are loosened with a punch. They could be locked either way, but I'd try turning them clockwise 1st, if they do not loosen with a few medium taps, try the CCW direction. They should lift right off when loose.
What are you trying to do, split the case??
If so, all the locking collars, the outside retainers and all 3 bearings will have to come off of only one side.
I'd take them off of the plate side and not the case side to begin with.
That way, you can get a good look at what's inside right away.
If the chains need replaced (about $40 for the pair at a Case/IH dealer) you will have to take the shafts completely out. You then need to remove the collars from both sides. The retainers on the case side can stay in place to help re-align the shafts when you replace them. This will also aid in making sure everything is lined up The old chains will come with the 3 shafts, it helps to have an assistant to help hole the shafts so the whole chain/shaft assembly can be lifted straight out of the case.
reassemble in the reverse order. I suggest you down load a copy of the parts blow-up for the unit. Will help you figure out how it all goes back together. Aldo the owners manual. It explains how the chain tension is set once new chains ae installed.
The chain tension fits over a shaft on the plate side and will have to be held in place while you lower the plate back into position. Use a putty knife or other similar piece of flat metal to hold it in place while you align the shafts and lower into place.
Get a piece of gasket mat's at your local parts store and make a new gasket. You will need a piece about 12 x 24"
I packed my case with 2 #s of high temp wheel bearing grease before re-assembly.
Goof luck!!
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