How To: Find and Diagnose ESOF Hub Vacuum Leaks
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Uploaded by TreySpooner on Nov 18, 2011
If the Autolock hubs on your ESOF equipped Ford SuperDuty do not lock or engage when you switch into 4x4, chances are you have a vacuum leak. This video will show you, step by step, how to find, diagnose, and to some extent repair the most common causes of this break down in the ESOF system.
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@roughnecktrav In that situation you may need to inspect the actual hub for leaks. Also, it would be a great time to do the locking hub maintenance. They need greasing once in a while and are often neglected.
TreySpooner 2 weeks ago
Great vid. Thanks
coupescuts 1 month ago