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Old 07-19-2020, 05:54 AM   #1
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Post Suspension Bolt Torque Values

I have a 2019 F53 (18,000 lbs). I added a RM steering stabilizer. One of the brackets attaches to the bottom of the u-bolt that connects the leaf spring to the axle. I am reading that I should torque these bolts to 250 ft/lbs. 170 is about all I can leverage. How important is it that I torque to 250?
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Old 07-19-2020, 06:05 AM   #2
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Get a bigger torque wrench. Harbor freight has them cheap. There is a torque value on those bolts for a reason.
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Old 07-19-2020, 07:07 AM   #3
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Spring U bolts need to be tightened to specs.

If not tight, the clamping force may not be enough to keep the axle from moving against the spring.
Remember Ubolts keep the axle/tires/brakes under the springs which are connected to the chassis.

As the axle moves it starts hitting against the spring center bolt. Once that wears or snaps, the axle shifts, causing alignment and other problems.
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Old 07-20-2020, 02:30 PM   #4
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Quote:
Originally Posted by twinboat View Post
Spring U bolts need to be tightened to specs.

If not tight, the clamping force may not be enough to keep the axle from moving against the spring.
Remember Ubolts keep the axle/tires/brakes under the springs which are connected to the chassis.

As the axle moves it starts hitting against the spring center bolt. Once that wears or snaps, the axle shifts, causing alignment and other problems.
Thanks, my wrench is big enough, I just need to put my foot into it! And I get what you are saying, a lot of forces in play while driving so I will get it torqued down to 250 ft/lbs.
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Old 07-20-2020, 07:43 PM   #5
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Thanks, my wrench is big enough, I just need to put my foot into it! And I get what you are saying, a lot of forces in play while driving so I will get it torqued down to 250 ft/lbs.
Or stick a pipe on the end of the torque wrench to get more leverage.

Ray
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Old 07-23-2020, 03:59 PM   #6
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Or stick a pipe on the end of the torque wrench to get more leverage.

Ray
Torque up to 250, life is good thanks to everyone for the guidance!
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