Get up on the roof and check the sealant around the crank mechanism. Research your roof material, rubber or fiberglass, and use the appropriate sealing product. Also check the other devices while you're up there, sewer vents, air/fan vents, radio antenna, air conditioner and ladder attachment points.
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2017 F350 Dually 6.7
2019.5 Hathaway
He who dies with the most tools, wins!
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