Lower coil spring retaining studs

Reply Subscribe

Thread Tools

Search this Thread

Dec 1, 2003 | 09:41 PM

hoxiii

Thread Starter

Postmaster

Joined: Jul 2003

Posts: 2,711

Likes: 2

From: Pittsburgh

Lower coil spring retaining studs

on the front of an '85 f-150 do the lower studs that hold the spring cup in place take any lateral load? I know the lower half of the stud that's 3/4-10 holds the radius arm in place, but the 5/8-11 section, does it really ever have any forces exerted on it?

Justin

Dec 2, 2003 | 11:11 AM

MustangGT221

Post Fiend

Joined: Nov 2001

Posts: 14,947

Likes: 6

From: Topsfield, MA

Laterally, yes because it holds the spring down on the seat.

Dec 2, 2003 | 09:41 PM

John Barleycorn

Junior User

Joined: Feb 2003

Posts: 60

Likes: 0

From: Raleigh, NC

Well, hold on now...

It does hold the spring down - but no side loads.

The radius arms and traction beams take all the side loads.

Dec 2, 2003 | 10:18 PM

MustangGT221

Post Fiend

Joined: Nov 2001

Posts: 14,947

Likes: 6

From: Topsfield, MA

The radius arms are held onto the traction beams by the bolt, so the lower part of the bolt does take longitudinal forces.

Dec 3, 2003 | 10:22 AM

85351ho

Postmaster

Joined: Feb 2000

Posts: 2,759

Likes: 2

From: Auburn,Al

yes, but of you use a longer bolt it does not matter because the radius arm is still on the very bottom of the bolt

Dec 9, 2003 | 10:52 AM

natewoz

Elder User

Joined: Feb 2003

Posts: 887

Likes: 0

From: MN

I need to machine a spacer for my air springs because I will be installing lift coils. Does anyone know what the diameter of the outside of the hex nut is? Mine is covered by the seating cup for the airspring, and I cannot measure it. If it's possible, a measurement from one corner of the nut to the oppisite corner would save me a lot of math. Thanks guys.

Dec 9, 2003 | 11:23 AM

StrangeRanger

Posting Guru

Joined: Dec 1999

Posts: 1,903

Likes: 2

From: Copley, OH

IIRC the nut is either 1-1/8 or 1-3/16 across flats.

To answer the original question, there's quite a lot of free play in the spring mounting at both ends, so the fasteners will see very little to zero shear loading above the beam.

Last edited by StrangeRanger; Dec 9, 2003 at 11:26 AM.