Are these yolk seals? - Ford Powerstroke Diesel Forum
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Old 04-20-2012, 06:04 PM Fanatic

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Are these yolk seals?

So are these front axle yolk seals? Both sides are out like this......Are they dust seals? Any ideas on what I need to do to remedy this would be appreciated

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Old 04-20-2012, 09:14 PM

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From the pic it looks like the outer seal of your axel tube. There is an inner seal that keeps the oil in the front diff, the outer seal keeps things from accumulating in the tube around the axel shaft. Seems that most people's are hanging like yours. You need to take everything off to replace them. If you don't go through a lot of water and mud I would wait till you have it appart to do a u joint or wheel bearing before fixing it. There is a chance the inner seal will get messed up when pulling the shafts out. I think ford upgraded the part to a metal and rubber seal that is supposed to be better. Maybe silicon it in place till then.
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Old 04-21-2012, 06:42 AM
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brs-170 is the motorcraft part number for the new upgraded dust seal
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