Thursday, January 7, 2016

Easy Out


Thank goodness, the headless engine-mount bolt came out relatively easily. From the picture above you can see that the bolt was well lubricated. Memo to self, always use antiseize.  Adding evidence to a fatigue failure is the rough edge of the bolt where it broke.  

Broken rear mounting bolts seem to be a common problem on LNVTs with Cummins engines. Having a four point mount, like Nellie's, doesn't prevent the problem.  Rather than merely inspecting the bolts on some periodic basis, Nellie bolts will be replaced biannually.  The bolts will be Grade 8 USS, 7/16"-14 x 1-1/4".


At the top of the picture above is where engine mount was removed. It would be impossible to access it with the turbo and exhaust hose in place.  The engine is being held up with cedar shims.  Not only do they work, they're easy to work with and they smell good.

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