550 bolster pin?

I'm working on a 550. They previous repair was with new tie rod ends. But that didn't fix the slop in the front end. Someone has tried to beef up the brace cups in back. But, the main pin or more so the front end is wore. I have taken the front end off and took it to a machinist. His plan is to bore it out and place a bushing. He told me that the hole is not exactly a right angle to the front end. Has anyone been involded in a simular project? If so do you know the angle it actually is?
 
I thought it was 4 degrees when I did my brothers 550, but that was a while ago so I could be wrong. Whatever I figured it was, it worked out good with a welded sleeve in there.

Donovan from Wisconsin
 
Never heard that number. I would think that much would make it very hard to steer. I've read 3, 4, and 5 degrees on other sites. I know 0 degrees doesn't work for the arms to the center frame support. BTDT!
 
Here was one of my posts from earlier this year. Well, I got the front axle all fixed up. New pivot pin cost $113. at AGCO. Local machine shop bored out the axle and installed a thick steel bushing - cost $200. We bored the hole at 4.5 degrees (the top of the hole was 5 deg. and the bottom was 4 deg. so we split the difference) It went back together perfectly and really tightened things up.
 

A timely topic.
I am working on the same problem, lots of slop in the front axle. The hole in the axle is ovaled out and the pin is worn. I have a lathe and mill so I can make a new pin and bore the axle for a bushing. My concern is how big of a hole can I bore in the axle without losing it's strength? The bigger the hole the ticker the bushing wall but too much weakens the axle. I have heard of S55/550 front axles breaking at the center when put under heavy load such as a front loader that is way overloaded. any ideas on a good bushing wall thickness?
 
I think when I did it I went with 1/4" per side, so 1/2" bigger. Full weld and then reamed or bored after to size. It's got a loader on it so it's been used some.

Donovan from Wisconsin
 

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