U bolt torque specs?

[jimeneztrans84]

I'm trying to remove the block under the front steering springs on my 2011 kw t660. Im going to need new u bolts but wanted to know the torque spec when I put them back on. Any one ever do this to their t660? Any tips to removing the blocks from under the springs? Thanks

[tree98]

Just curious why you want to do that?

[ynot]

It's been while since I did mine, but I think the spring shop said 500+ ftlbs, basicly tighten them tell ya can't tighten em anymore.


An hes doing it too drop the front an inch or more cause kenworth's come with the front jacked up higher then the rears for some reason. It started around the time of dpf's so the only thing I can think of is its for more air flow to help cool the dpf.

[snailexpress]

You can find torque numbers on front axle manufacturer website. Usually 450 - 500.
But......
Do you realize all consequences dropping front down?
It will change the drive line angles and rear differentials angles. To adjust them you need to lover leveling valve ride height. So you came back where you started.

[jimeneztrans84]

The block is about 2" If I can recall. I don't think that would make that much of a diff on driveline

[Lonestar10]

Drive angles should stay the same just front drive axle might carry a bit more weight then rear as frame angle leans more toward front

[Rawze]

(03-03-2019 )ynot Wrote:  It's been while since I did mine, but I think the spring shop said 500+ ftlbs, basicly tighten them tell ya can't tighten em anymore.
...

That is incorrect information.

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-- Find the correct torque spec for the maker/manufacturer of the axle you have via a service manual ... u-bolts and improper torque can kill you or someone else!.

[snailexpress]

(03-03-2019 )Lonestar10 Wrote:  Drive angles should stay the same just front drive axle might carry a bit more weight then rear as frame angle leans more toward front

This why drive line angles require to be up to one tenth of degree in spec. Simple trigonometry calculation will open your eyes. You was warned.

[Chamberpains]

I've posted this a bunch on here. It's Dayton's u-bolt torquing and replacement procedures. I use Dayton because they make a lot of the u-bolts on all suspensions.

** Direct download link**

https://www.google.com/url?sa=t&source=w...r2HqEw6jCu

https://www.suspensionspecialists.com/te...mation.pdf