Leaf U BOLTS
Fleet Mechanic
Joined: Jul 2011
Posts: 1,667
Likes: 5
most all bolts have a torque setting,if thats not available,then you can come close by going to a standard fastener torque chart,but you will need to know thread pitch,diameter,grade of metal,lubricated or dry torque.
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
There should be a published torque spec of the U bolts for whatever truck you're working on. I'd consult a dedicated service manual.
Given the nature of those fasteners and their unique use I'm not sure something considered standard perhaps in the machinery world would apply.
Whatever you mean by a regular wrench might be not be adequate to properly install those bolts though---the torque spec will pretty much determine the tools necessary.
Given the nature of those fasteners and their unique use I'm not sure something considered standard perhaps in the machinery world would apply.
Whatever you mean by a regular wrench might be not be adequate to properly install those bolts though---the torque spec will pretty much determine the tools necessary.
Senior User
Joined: Aug 2013
Posts: 108
Likes: 0
From: northeast Illinois
A truck mechanic told me to return 500 miles after he installed new U-bolts on the rear leaf springs of my F250. He said the bolts loosen up a bit after the initial installation and need to be torqued again.
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Joined: Sep 2013
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From: Souderton
There will be a few different determining factors for your torque specs. What grade the Ubolts are, plated, unplated, fine thread, etc and the list goes on.....
Here is our torque page that a lot of people on the Internet reference too.
Recommended U-Bolt Torque, Suspension Replacement Parts
Here is our torque page that a lot of people on the Internet reference too.
Recommended U-Bolt Torque, Suspension Replacement Parts
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Joined: Sep 2013
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From: Souderton
-Junior
Freshman User
Joined: Sep 2011
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Don't know what year you have, but my book states for foot pound torque on the u-bolts:
2004-2006 2-steps
step 1... 22 in crisscross pattern
Step 2... 85 in crisscross
2007 and later 4-steps
Step 1... 26 in crisscross
Step 2... 52 in crisscross
Step 3... 74 in crisscross
Step 4... 98 in crisscross
Hope this helps.
2004-2006 2-steps
step 1... 22 in crisscross pattern
Step 2... 85 in crisscross
2007 and later 4-steps
Step 1... 26 in crisscross
Step 2... 52 in crisscross
Step 3... 74 in crisscross
Step 4... 98 in crisscross
Hope this helps.
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