^+1 or 2,
In what dimension does it "not slide on", vertically or horizontally--by how much does in "not slide on"? If just a tiny bit it could be a machining burr or swarf that could be easily scraped or filed away. Some times when it will not slide "in" a bit if lubricant can make things work out; back in '72 in 'Nam there was this little chick--well I guess you get the picture, if not I can send it to you...
Bottom line , either "hog it out" to make it fit, or send it back.
In what dimension does it "not slide on", vertically or horizontally--by how much does in "not slide on"? If just a tiny bit it could be a machining burr or swarf that could be easily scraped or filed away. Some times when it will not slide "in" a bit if lubricant can make things work out; back in '72 in 'Nam there was this little chick--well I guess you get the picture, if not I can send it to you...
Bottom line , either "hog it out" to make it fit, or send it back.