cracked drive wheel casting?

[608KEB 795]

I was changing the seals on my 1975 B-80 transmission and decided to clean it up and paint it in the process. I noticed two of the 5 blades are cracked on the cast belt drive wheel. Has this happened to anyone else's tractor? Can I get a replacement at a toro dealer or find a used one? Will the cast wheel last a while with these cracks? K.B.

[smoreau 658]

I have had (not any more) 2 of these pulleys and 1 had a cracked blade and it looked like it was that way long before I had it and it worked just fine.

[608KEB 795]

Thanks, the cracks looked like they had been been there for a while. K.B.