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leaf spring center bolt torque

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Old 12-22-2012, 08:21 AM   #1
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leaf spring center bolt torque

Does anyone know it off hand? Fixing to start on my aal. Its an 09 model. Thanks!
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Old 12-22-2012, 08:38 AM   #2
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No torque spec just tight. Look at chris4x4's write up and there are specs there except for that bolt.
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Old 12-22-2012, 08:42 AM   #3
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Usually that is about a 3/8" diameter bolt, but hardened and threaded all the way through. I would say about 50-60ft/lb. NO antiseize since removal will probably require grinding or torching.

Or in laymans terms, two grunts and a fart. You want it tight enough to compress all the leaves together firmly, with just a little stretch. The nut will strip long before the bolt does.

A couple of C-Clamps often helps it get started and remember, cut off the excess with a hacksaw or abrasive wheel, careful not to take the temper out of it.

I have been building spring packs for decades.

Howard
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Old 12-22-2012, 08:44 AM   #4
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Alright thanks guys
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Old 12-22-2012, 08:58 AM   #6
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German spec: Gooodntight
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Old 12-22-2012, 12:32 PM   #8
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The stock bolt is only around 55 ft/lbs...
but I have had those come loose over time
during severe duty when flexing things out off road.
If the center bolt comes loose... the individual leaves could possibly fan out.

Sooo... I replaced mine with a grade 8 cap bolt/nut
and torqued that down to around 75 ft/lbs.

It's been several years now...
and nothing has worked loose, malformed or broke

* I recommend red locktite when installing.
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Old 12-22-2012, 12:40 PM   #9
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Quote:
Originally Posted by TacoDell View Post
The stock bolt is only around 55 ft/lbs...
but I have had those come loose over time
during severe duty when flexing things out off road.
If the center bolt comes loose... the individual leaves could possibly fan out.

Sooo... I replaced mine with a grade 8 cap bolt/nut
and torqued that down to around 75 ft/lbs.

It's been several years now...
and nothing has worked loose, malformed or broke

* I recommend red locktite when installing.
Yep , had that happen before I try to use either a rated nylock or I'll tighten down & back it up w/nut (dbl nut)
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