+- Rawze.com: Rawze's ISX Technical Discussion and more (http://rawze.com/forums)
+-- Forum: Big Truck Technical Discussion... (/forumdisplay.php?fid=1)
+--- Forum: Ask Your question... (/forumdisplay.php?fid=45)
+--- Thread: U bolt torque specs? (/showthread.php?tid=4226)
U bolt torque specs? - jimeneztrans84 - 03-03-2019
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
RE: U bolt torque specs? - tree98 - 03-03-2019
Just curious why you want to do that?
RE: U bolt torque specs? - ynot - 03-03-2019
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.
RE: U bolt torque specs? - snailexpress - 03-03-2019
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.
RE: U bolt torque specs? - jimeneztrans84 - 03-03-2019
The block is about 2" If I can recall. I don't think that would make that much of a diff on driveline
RE: U bolt torque specs? - Lonestar10 - 03-03-2019
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
RE: U bolt torque specs? - Rawze - 03-03-2019
(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.
...
=======================
-- 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!.
RE: U bolt torque specs? - snailexpress - 03-03-2019
(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 frontThis 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.
RE: U bolt torque specs? - Chamberpains - 03-03-2019
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=web&rct=j&url=https://www.suspensionspecialists.com/techinfo/Ubolt_Information.pdf&ved=2ahUKEwi9oKizp-fgAhWttlkKHVJNC7AQFjACegQIBBAB&usg=AOvVaw1zn7mMuCwkjyr2HqEw6jCu
https://www.suspensionspecialists.com/techinfo/Ubolt_Information.pdf