Jump to content

U-Bolt torque


Recommended Posts

Im in the process of some front suspension work and am trying to find the torque required to retighten my front u bolts. I have not measured the size of the actuall bolts, they look to be 3/4 in. 2003 HR Endeavor with the roadmaster chassi i found a chart for trailer u bolts which shows 300 ft lbs, however not sure if application is the same torque.

Link to comment
Share on other sites

Measure the outside diameter of the bolt (not the hex nut) and look up the torque in an engineering table.  The issue is figuring out if they are grade 5 or grade 8.  Usually the head is marked if they are grade 8 and they may be black.   

https://www.engineersedge.com/torque_table_sae_ftlbs.htm

Now the real question is why are you re-torqueing them?  

Link to comment
Share on other sites

30 minutes ago, Rikadoo said:

Im in the process of some front suspension work and am trying to find the torque required to retighten my front u bolts. I have not measured the size of the actuall bolts, they look to be 3/4 in. 2003 HR Endeavor with the roadmaster chassi i found a chart for trailer u bolts which shows 300 ft lbs, however not sure if application is the same torque.

I would contact; http://sourcerv.com/ Experts on the Road Master chassis.

Edited by Paul A.
added info
  • Like 1
Link to comment
Share on other sites

Reason for the retorque is that im installing a bracket for my Safe t system that attaches to two uf the u bolts an they dont supply a spec for. So before i start the job i want to get all the information BEFORE i disassemble. I borrowed a torque mulitplier so i dont have to pull so hard tightening them. There pretty dirty so i need to brush them clean to prep them for reassembly, i have all the required tools im just needing some specs…

  • Like 1
Link to comment
Share on other sites

Having modified the S-T-+ bracket, it’s probably 500 ft lbs… had to put a pipe on the 3/4” L handle to get them off. Used the same amount of force to put them back on… not worried about the exact torque.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...