Any info on International 500 w/4 in 1 bucket?

[Mass Digger]

I just bought an International 500 with a 4 in 1 bucket that is in pretty good shape. The only possible issue that I have found is that I really need to pull hard on the left track clutch/brake in order to get it to turn left at all. The guy that I bought it from said that he had all the manuals but could not find them for the sale. If they turn up he will mail them to me but does anyone have any ideas what I could do in the mean time?

Besides the turning issue I am interested in any information that any of you have about these tractors. The model # is 500D356 and the serial # is H3760S

Thanks,
Marc