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-   -   Torque Spec on Stub Axle Retaining Nut? (http://www.clubcobra.com/forums/era-speak-bob-putnam/95397-torque-spec-stub-axle-retaining-nut.html)

smallblockhead 03-11-2009 06:06 PM
Torque Spec on Stub Axle Retaining Nut?
 
Bob,

I'm a little confused on the final torque specs for the stub axle retaining nut, ERA suspension, as discussed in the ERA FIA Manual, pg. 39 and 40. Should the retaining nut be torqued to 140 ft lbs or 225 ft lbs?

Thanks,

Gary

RICK LAKE 03-12-2009 04:49 AM
Book has 140 pounds with new bearings
 
smallblockhead Gary The Jaguar service manual has 140 lbs with new bearings final torque with a spot of loctite. The setup load is 55 pounds for checking end play for the hub on the shaft. This is very important to check. If you are not 100% sure about this, go to ERA and let Doug setup the ends. He has all the special spacers for the correct end play. I did mine twice and it still had too much play.:o This will cause the car to wonder, have a poor alignment for the rearend, and just cause wearout before its time. Been there, done that. :CRY:Rick L.

strictlypersonl 03-12-2009 05:38 AM
The 140lbft figure is for checking hub end play. Once the end play is correct, do a final torque to the higher figure.

smallblockhead 03-12-2009 08:27 AM
Thanks to both Bob and Rick for the responses. One vote for each choice. I'll go with the man from ERA, since they make the cars!

Bob, I do have a question, why are ERA specs so much higher than the Jaguar manual? Is the stub axle ERA uses a higher strength steel?

Thanks,

Gary

strictlypersonl 03-12-2009 10:00 AM
It depends on which Jag manual you are reading... Doug says that he sets his impact wrench to about 120 lbft, then tightens to the next cotter pin line-up.

RICK LAKE 03-12-2009 12:51 PM
One small note on this
 
smallblockhead Going to 120 pound of torque and then tighting it to the next hole in the shaft sounds like about the 140 number. I did over torque the first rearend I did and cranked the spacer for the hub play. IMO you could also crush the hub bearing and cause bearing failure. Mine was a soft steel spacer. Not a machined steel washer. Rick Ps Doug is the man at ERA for all cobra repairs.

Jim Holden 03-12-2009 02:58 PM
"This will cause the car to wonder..."

Me too.

Jim

smallblockhead 03-12-2009 05:14 PM
OK, thanks all.....140 ft lbs it is.

Gary


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