Spreader ID

I need to replace the cog (cam) that drives the arm that pushes the gear that spins the axle that drives the apron...this cog - the one that's on the axle just inside of the hub - is worn to the point where the arm and cam-follower drops off to the inside. She no go. The arm is also worn and will need welding attention, but is salvagable. I'd like to replace the cog if I can get it, but will resort to welding it if I can't.

I suspect the spreader is either an IH or an IH-McCormick. This cog has the IH insignia on it, along with what I'm told is the casting number (4203 SC, if memory serves).

Other characteristics:
All metal box
Originally red
Two beaters, with U-shaped bolt-on teeth
One spreader at the rear

The apron drive apparatus is on the right side of the spreader (when viewed from the rear looking towards the tongue). The beaters and spreader are driven by a chain that engages a sprocket on the left side. I'm told that an IH-100 or IH-200 have the apron drive and beater drive on the same side, and have seen diagrams of the axle that appear to confirm this.

The closest thing I've found on the net is an IH-McCormick 200, but as far as I can tell, the IH-McCormick 200, 100, and the IH-100 or 200 are all wood bottomed spreaders (please correct me if I'm wrong). The pictures I've seen of the IH-McCormick 200 TOYS all have the exact same tongue (hitch), the same stand (when unhitched) and the same beater/spreader set-up as this spreader has, but the cowling looks a little different. However, mine only has a portion of the cowling in place, and I suppose it's possible that different cowlings existed throughout the years of manufacture.

Specifically, was there anything made similar to an IH-McCormick 100 or 200 either before or after the 100/200 series with an all metal box?

Any help would be appreciated.

Stranded in NY with a big pile of manure, a pitchfork, and a sore back,
Russell

My local tractor dealer faxed me exploded views of the axle of an IH-110 and the axle and rear apron shaft of the IH-100H (same axle as an IH-100?). Neither is identical to what I've got, but they both have similarities. The 110 appears to have the beater-drive sprocket and the apron-drive cam on the same side. I'm not sure what to make of the 100H axle - is the apron driven directly by an engaging sprocket on the axle? This has an arm/bracket, one end of which holds a large cam follower and rides in the apron-drive cam located on the axle; as the wheel turns the cam causes the arm/bracket to pivot and the opposite end's "fingers" rotate a gear that's mounted on the outside of the apron shaft.

Other characteristics: Top beater has 3 rows of teeth, bottom beater has 6. Rear spreader composed of two spiraled sheets. 7.50 x 20" tires (yeah, one's mounted backwards..).

Thanks for your help.

Russell

chow.