450 ft pounds!!!

Britcheflee · Oct 2, 2012

I see that the rear axle main nut needs to be tightened up to 450 ft pounds - guess I am going to have to put a large pipe wrench on it with an extra piece of pipe to lever that down!
I dont even think my torque wrench setting goes up that high.

Lee

Ultradog MN · Oct 2, 2012

It's not that much really.
If you weigh 150 lbs, hanging on the very end of a 3' long wrench would get you there.

CJ in Michigan · Oct 2, 2012

2' does it for me-

Britcheflee · Oct 2, 2012

(quoted from post at 07:40:33 10/02/12) 2' does it for me-

I guess that compresses down the inner rubber seal on the spline of the axle as well to make the hub seat properly?

Dell (WA) · Oct 2, 2012

Lee........NO, the BIG NUT only touches the shoulder of the splined axle thru 1-washer. Look at yer FO-4. And YES, 450ft/lbs BEFORE you put the snap-ring on the outside of the BIG NUT. Iff'n yer really sphincterly challenged, you can RENT a 3/4"-drive torque wrench with 1-15/16 socket. And NO, you don't want to buy a 600ft/lb 3/4"-drive torque wrench. ........the tite Dell

Ultradog MN · Oct 2, 2012

LOL
We must weigh about the same amount.

Jerry/MT · Oct 2, 2012

Use a cheater bar and stand on it! 450 ft-lbs means "real tight".

Den N Ms · Oct 2, 2012

How about a 2" 3/4 drive socket?

ASEguy · Oct 2, 2012

I put RTV on the splines to prevent fluid leaking through.

NoNewParts · Oct 2, 2012

makes ya wonder what the actual torque reading is,
that you are applying, when you are trying to get a stubborn one
loose that has the threads bottomed out

Britcheflee · Oct 3, 2012

yes, did that, got it tight - but assuming I can really crank down on it when the wheel is back on?

Hobo,NC · Oct 3, 2012

In theory yes in reality no...

http://ytforums.ytmag.com/viewtopic.php?t=938730&highlight=bounce

TheOldHokie · Oct 3, 2012

(quoted from post at 08:12:16 10/03/12)
In theory yes in reality no...

http://ytforums.ytmag.com/viewtopic.php?t=938730&highlight=bounce

No my friend - this is basic physics pure and simple. Torque is torque - friction has nothing to do with it. A 150# man on the end of a 3' bar produces exactly 450 lb-ft of torque. Jumping on the bar simply produces more than 450 lb-ft of torque becasue you are using gravity to "increase" your static weight (force) with an acceleration force.

Friction enters the picture when we try to use torque as an indirect measure of the clamping force (tension) created in a threaded fastener as we tighten it. That friction varies with the materilas the fasteners are made from and the condition of the threads (oiled, greased. plated. etc). All of those factors are [b:3199fb7935]already included[/b:3199fb7935] by the engineers in the 450 lb-ft specification for tightening that nut. Applying a greater torque simply produces a tension greater than the engineers wanted.

TOH

ASEguy · Oct 3, 2012

If you wait the RTV would have set up and tightening more may "break" the seal. I put a rod between the lugs for the wheels and braced it against the ground when I tightened mine. Gerard

Hobo,NC · Oct 3, 2012

If you are up to a challenge...

Loosen the lug nuts on your car/truck lay 100lbs on the end of a ft bar to tighten the nuts then go drive it... Make sure you insurance is paid up....

Let us know how it works out for ya...

TheOldHokie · Oct 4, 2012

(quoted from post at 21:49:11 10/03/12)
If you are up to a challenge...

Loosen the lug nuts on your car/truck lay 100lbs on the end of a ft bar to tighten the nuts then go drive it... Make sure you insurance is paid up....

Let us know how it works out for ya...

I have complete confidence that it is tight enough. That is exactly what a high dollar torque wrench is doing when you set it to click at 100 lb-ft. Here is a good read on the matter:

Fastener Training Institute - Torque and Tension (4MB PDF)

TOH

450 ft pounds!!!

Britcheflee

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Ultradog MN

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CJ in Michigan

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Britcheflee

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Dell (WA)

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Ultradog MN

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Jerry/MT

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Den N Ms

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ASEguy

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NoNewParts

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Britcheflee

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Hobo,NC

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TheOldHokie

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ASEguy

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Hobo,NC

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TheOldHokie

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