Axle U bolts

[TJ1978]

I have ordered new ORD leaf springs and would like to replace the old U bolts while I’m at it.

I have 8 lug 3/4 ton axle and wondering how do I measure the diameter of them to get the proper U bolts.



This is what I need to know how to measure

 

[Wes Harden]

Veneer calipers. If none use a screw clamp to loosely fit tube the measure opening of clamp with tape or ruler

 

[centexk5]

Just be prepared to have to bend them. I had to put a couple in a vice to get them closed enough to slip through the plates. Had to have one reordered because I couldn’t bend it in enough.

 

[rampage]

Veneer calipers. If none use a screw clamp to loosely fit tube the measure opening of clamp with tape or ruler

Or a couple of carpenter’s squares to imitate a caliper. Just make sure the space between them is parallel.

 

[TJ1978]

I used a C clamp and came up with 3 3/8

 

[TJ1978]

Also ordered these... I figure since I’m doing the leaf springs might as well replace these

 

[Wes Harden]

your upper bushings looking a little aged, won't last much longer. Good call. The new shackles are stronger, will eliminate some flex.

 

[TJ1978]

They're in bad shape so I figured, might as well.

 

[diesel4me]

I had to replace the plates that go over the U-bolts to the leaf springs on my K2500,the passenger side one actually rotted in half ,right over the area that covers the spring center bolt!.(and I was unaware of that till I looked at it one day,a disaster waiting to happen!)...the center bolt was broken too..wasn't a fun day replacing those parts,I also put a new shackle on too,but the spring bushing's inner sleeve came out stuck to the bolt after hours of wrenching--had to press it back in with a C clamp..bushing was a bit beat up but I had no way to get another one..I used a grade 8 bolt with the head ground round for the center bolt..

That shackle already looks 20 years old,flaky rust on it now--was only put on maybe 6-7 years ago..
I bought two but only replaced the passenger side..now the drivers side one has holes I can see daylight thru..

 

[Bent77]

Pretty sure those are 3.5. Call when you order, they’ll sort you out. FWIW, when I install them, I use the #460 channel locks to squeeze them into the plate

 

[TJ1978]

I already ordered them. I see no other size other than 4.5

 

[Bent77]

I already ordered them. I see no other size other than 4.5

You’re good there, I should have specified the u bolts

 

[TJ1978]

You’re good there, I should have specified the u bolts

I used a C clamp to get the width and measured that distance.

 

[swettysblazer]

14 bolt axle tube is 3 3/8