how to - crankset radical restoration
Some people asked me about my restorations of Shimano XTR crankset I`ve done so far. Crankset restoration is actually requested more than others, because there`s nothing to do more than a new facelift (...and that`s cool). Well, I decided to response on these requests and write a short how-to story with some description of steps I usually do. I got another opportunity to restore XTR crankset, so go for it. Great, welcome to my how-to story about Shimano XTR FC-M952 crankset radical restoration.
I already wrote in one of my previous blog posts that the cranks were originally painted by Shimano. Before I start anything, I clean both crank arms in warm water with degreaser and remove old dirt and remaining grease (1). Next step of the restoration is to remove old painting (2). Nothing special, just use old good paint removal, which works perfectly. As per my experience, it will take some time and I need to apply paint removal in a few more rounds. When completed (...and crank arms are now paint less) I repeat cleaning in hot water with degreaser (3). A step after is brushing (4). As you my envision, I do hand- and machine-brushing. I use several types of sand-papers. At the end of brushing I apply finishing glaze and polishing paste (5). Again, I have couple of with different grain sizes. I always do maximum to polish the cranks. Don`t be hurry, the better surface preparation, the better anodizing effect. Do not forget to clean the arms in warm water in the end. Next step would be anodization of the cranks (6). But even before that, cut threads for the pedals again. I obviously use M10 hand step-screw tap. The crankset goes for black anodizing and lasering Shimano XTR logos. I request same black anodizing for dust nuts, too. However, it`s not on me, this will be handled by my friend.
When completed and sent back to me, last step of this restoration is crank set completion with a pair of self-extracting bolts and dust nuts, and mounting a set of XTR chainrings on drive-side arm. Job`s done. Hope you like it. My short how-to photo-story will help you with your restoration. If still complicated, don`t worry, I can help you.
What`s next? I do plan another radical restoration with chromium plating. Stay tuned.