Lower control arms

[MAStuart]

Dan thanks for your reply. I see you got the spread sheet posted ......good info.


I was just machining the parts that the bushings and seals go into. I am building two sets of rear control arms for a Daytona Coupe. There is some conflicting info out there on the size of the bore where the seal goes. The plans I am working off of show the bore to be 1 inch another drawing shows .999 I just ordered some seals 7410, 7408 and a 312518 that is direct replacement for one of the other two seals. I also had a 7411 seal ordered but canceled it when I saw it was for a bigger bore.

I read your spread sheet and saw it calls for the 7411 seals. I bored the parts at 1 inch and thought any of the seals above listed would work. I could rebore my parts another .005 and use the 7411 seal.

Have you ever seen where someone has installed grease zerks in an otherwise stock setup?

Mark

[Dan Case]

Originally Posted by MAStuart

Have you ever seen where someone has installed grease zerks in an otherwise stock setup?

Mark

My information is based on stock street cars the way AC Cars made them. Racers made all kinds of modifications over the years, so many that finding completely original pieces is difficult.

Yes, I have seen vintage racers with a couple of different grease fitting schemes for rear lower vertical pins.

Also worth noting, since you are going after a racing configuration the RLS 12 rear hub bearings don't apply. For road racing, Shelby American modified rear vertical links and converted them to taper roller bearings for rear hub axles.

[MAStuart]

Thanks again Dan. Lots of good hard to find info here

I thought about grooving the bushing in an x pattern and adding a zerk. I don't think I will now because the way they came looks to hold up pretty well.

Mark

[rsk289]

I believe the original bushes for the rear lower wishbone outer pivot pin were a DU bearing, which is supposed to be self-lubricating.

https://www.ggbearings.com/en/products/metal-polymer/du

I stand to be corrected by Dan!

I know of some folk with Cobras and Aces in Europe who have machined Vesconite to do the job instead, with some success:

https://www.vesconite.com/prod/hilube.htm

Its origins are in the mining industry, I believe.

[MAStuart]

rsk289 yes that is the bearing 12DU16 listed in Dan's spread sheet. Link to spread sheet Common Rack & Pinion Cobra (leaf spring chassis) Service Parts

[MAStuart]

Well now that was painless. Called the local Motion industries gave them the Garlock number and seal numbers and they were there the next morning. I asked how this joint was lubed. Now things make sense. These bearings can be run dry. So thanks to the replies to this thread another problem on my build has been solved .


By the way the bearings were cheaper than the seals.

Mark

[rsk289]

Originally Posted by rsk289

I believe the original bushes for the rear lower wishbone outer pivot pin were a DU bearing, which is supposed to be self-lubricating.

As noted!