One of them still has a pad and one the pad has come off but I do not want to replace them untill I fix this problem. The brake is making contact with the pulley from the side not where the pad is. Are the brakes supposed to engage when the drive belt is engaged?
I compared the linkage and brakes to the parts diagram all parts appear to be unbroken and in good shape and installed correctly. The extension spring that controls the belt engage seems OK. The spring for each brake appears to be in good condition. I did not see any cables in the parts diagram. When I engage the belt the brakes coonect with the pulleys.
Let me know if you need a picture of something I did not capture.
It looks like both brakes are hitting incorrectly. Loosen the bolts that hold the brakes to the deck. Refer to the first picture you posted. The left brake should be making contact with the left pulley at around the 2 or 3 o clock position. The right brake should be contacting around the 7 or 8 o clock position. Move them to that position and see if that helps. I also think the engaged versus disengaged in backwards.