Thanks Sam, It has been dripping for a while but we have been gettign a foot of snow a week so i have been working it pretty hard.
The pin dose not appear to be broken it just looks like the cotter pin broke and the nut backed off.
I am running a modified 8.25x24.5 logging truck wheels with 1200r24.5 tires 55gal of calcium in each with Modified Logging Tryggs. I have broken a few welds so far. It gets quite a bit of traction. I also run 300lbs on my blade for more cutting power.
I will try to R&R the horn tonight, i should be able to leave the hole brake assembly intact for this process? Other than unhooking the linkage?