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+[* black] Dirt and grime will also often collect around the smaller upper nut, that of the hard brake line, making it difficult to place a wrench over it.
+[* black] This can be carefully scraped away with the tip of a small chisel or a large flat blade screw driver.
+[* black] After scraping out all the debris in steps 4 and 5, spray the connection with some brake cleaner to remove small particles. You want to avoid introducing dirt in to your brake system.

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