Rim deformation during removal?

I have a 1946 Model B. Today the valve stem snapped off and one of my rear tires went totally flat. I lost most of the calcium chloride solution. But that's not my biggest problem.

I went to take the rim off the wheel (I guess this is how you say it) and the way mine is that there are two four lugs. Two are bolted in from the back and the rim slips into place on them and the other two bolt in from the front and lock it in place. 

I started to take one of the ones from the front off with an impact wrench and the rim sort of started to jump/slide around and looked egg-shaped at one point. I didn't know what to do, so I kept impacting it off and it bounced around a lot more and looked egg-shaped one more time before coming off and looking fine... Is this normal? Bear in mind I've never removed a wheel that didn't have studs and lugnuts, lol.

Thanks...

— Probably Finally Starting to Lose It For Reals This Time 

Put one of the standard clamps on the tractor HUB at 12 o'clock..... roll the rim over and set it OVER the clamp so it is hanging on the hub..... Put the two LOBE SHAPE clamps at 3 o'clock and 6 o'clock... and the other STANDARD bolt at 9 o'clock

You can turn the two CAM BOLTS at 3 and 6 o'clock so they push OUT and tighten on the rim... then HOLD them and tighten the nuts... as Dave said, the CROSS on the bolt head shows you the HIGH spot of the CAM.

Oh really, wow, that's good news! The other side has already been replaced with a newer hoop style rim and so I figured I'd probably better just do that, too. If one went bad, the other one might be, too. That's assuming it rusted out or something. Or maybe they just hit a rock.

My other, good wheel:

I bought the rims on e-bay.. They are all over the map price wise.. Cheapest 9 x 24 was $125.   and they go up to $300.   WHY ? I dont know.... Some give the DIAMETER of the bolt circle and some do not.. Make sure you know what your gettting.. I bought the CHEAPEST pair for $125. each  + tax.. free shipping... They say the bolt diameter is 20 1/4 inch ... i measured about 20 inches on my hubs.. Figured i would do a little grinding or use 1/2 inch bolts instead of 5/8 ..... Some vendors list "rims for ALLIS" and then give 20-3/8 diameter bolt circle.... cant be.... ??  I was looking at 10 inch rims also, but cheapest was about $160.

You mentioned there's CC in the wheels. Better inspect those rims real good. CC eats the rims up making them weak and dangerous especially at the bead. I see the one rim is pretty rusty. Make sure the inside of the wheel where the tube goes is nice and smooth so you don't ruin a tube with the rusty, and scale inside.

Steve@B&B

PM sent. I have everything you need.

Bill

When I first dragged my B out of the woods and got it home, it had CC in both wheels. One wheel was so bad, the lip of the rim where the tire beads was rotting through! It was tough to see at first because your rusty rim reminded me of both of my rusty, rotted rims. That's why I referred to them as possible being dangerous. I wound up tossing both rims and picked up a couple nice clean used ones from one of the GOTO's one year. That was back in 2000. Whew! Time flys! It's time to do a semi-resto on the ole' B again and get her cleaned up and repainted...

Steve@B&B