I'm doing the boat trailer bearings in the ranger bass boat. This is my first time doing them in several years of owning the boat so they are due. I cleaned, repacked bearings and put everything back together with the damaged seals because I couldn't find any locally. I think I damaged the seals getting them off. I finally got to work on the trailer again today after receiving what I believe to be the right seals. They look exactly the same. I am having trouble getting the pin back in on the castle nut and had to use a smaller diameter cotter pin. In the case of the ranger trailers, they use a straight pin as original equipment, I'm assuming. After getting everything back together, I noticed that the wheels don't spin as freely, possibly because I had to tighten the castle nut a bit more for the cotter pin to fit. It makes about one revolution freely as opposed to several. Another weird thing is that there is a cover that fits over the nut and I couldn't fit it on one side but could on the other. Is this something I should be worried about? Only other thing different is I used a bearing repack tool today and the new grease seals.