The Ford Barn

shew01 · 02-20-2023, 12:00 PM

Does anyone have a torque value for the hanger nuts that hold the rear spring onto the rear cross member? I know they have cotter pins, but I want to get them tight enough before adding the cotter pins.

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shew01 · 02-20-2023, 12:23 PM

40 ft lbs seems pretty tight to me. Is that enough?

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CA Victoria · 02-20-2023, 01:26 PM

If they are 1/2-20 grade 5, the std torque spec is 85# dry.

GPierce · 02-20-2023, 01:35 PM

Deleted

Keith True · 02-20-2023, 01:39 PM

I don't think that is a place for an arbitrary torque value according to the bolt size.You have to tighten them and make sure the clamp is evenly flat on the spring,and the ears are somewhat evenly distanced from the crossmember flanges.Just blindly using a torque value will leave you with the clamp too tight on one side or the other.It is not like clamping two pieces of iron together with a bolt and nut,there is springiness in those clamps.

Kurt in NJ · 02-20-2023, 02:10 PM

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the original nuts were hardened, they should be good and tight.
if replacing the nuts they should be at least grade 8
From the looks of the red rust dust the spring needs lubricated and the u bolts have been too loose

02-20-2023, 12:00 PM	#1
shew01 Senior Member Join Date: Sep 2016 Location: Roanoke, VA USA Posts: 1,908	Hanger Nut Torque for Rear Spring U-Bolts Does anyone have a torque value for the hanger nuts that hold the rear spring onto the rear cross member? I know they have cotter pins, but I want to get them tight enough before adding the cotter pins. Sent from my iPhone using Tapatalk

02-20-2023, 12:23 PM	#2
shew01 Senior Member Join Date: Sep 2016 Location: Roanoke, VA USA Posts: 1,908	Re: Hanger Nut Torque for Rear Spring U-Bolts 40 ft lbs seems pretty tight to me. Is that enough? Sent from my iPhone using Tapatalk

02-20-2023, 01:26 PM	#3
CA Victoria Senior Member Join Date: Feb 2011 Posts: 2,113	Re: Hanger Nut Torque for Rear Spring U-Bolts If they are 1/2-20 grade 5, the std torque spec is 85# dry. __________________ Tim Downtown, Ca

02-20-2023, 01:35 PM	#4
GPierce Senior Member Join Date: Dec 2014 Location: Germantown,TN Posts: 517	Re: Hanger Nut Torque for Rear Spring U-Bolts Deleted Last edited by GPierce; 02-20-2023 at 01:42 PM. Reason: Delete

02-20-2023, 01:39 PM	#5
Keith True Senior Member Join Date: May 2010 Location: Epping N.H. Posts: 2,990	Re: Hanger Nut Torque for Rear Spring U-Bolts I don't think that is a place for an arbitrary torque value according to the bolt size.You have to tighten them and make sure the clamp is evenly flat on the spring,and the ears are somewhat evenly distanced from the crossmember flanges.Just blindly using a torque value will leave you with the clamp too tight on one side or the other.It is not like clamping two pieces of iron together with a bolt and nut,there is springiness in those clamps.

02-20-2023, 02:10 PM	#6
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Hanger Nut Torque for Rear Spring U-Bolts Sponsored Links (Register now to hide all advertisements) the original nuts were hardened, they should be good and tight. if replacing the nuts they should be at least grade 8 From the looks of the red rust dust the spring needs lubricated and the u bolts have been too loose