Hi Bob,
Yes, 160 lbs of you on the end of an 18" breaker bar will result in about 240
ft-lbs of torque.
However, setting your torque wrench at 125 ft-lbs and extending the handle to
24" will only make it easier for you to get to 125 ft-lbs. The torque wrench
doesn't care what you do with the handle length.
So......
Go ahead and step on that breaker bar.
I had to do the same thing for the rear axle nut on my TVR 280i. It worked
just fine.
thanks,
Bill Babbitt
Gales Ferry, CT
TR3a, TVR 280i
--- On Sat, 1/3/09, Bob Danielson <75TR6@tr6.danielsonfamily.org> wrote:
From: Bob Danielson <75TR6@tr6.danielsonfamily.org>
Subject: [TR] Torque Wrench Dilemma
To: triumphs@autox.team.net, 6pack@autox.team.net
Date: Saturday, January 3, 2009, 8:37 AM
Oh math/physics/engineer gurus..........Here's my question....
Goodparts CVJs specify that the 1-1/4" axle nut be torqued to 220-250 lbs.
My audible click-type torque wrench maxes out at 150 lbs.
It's been suggested that 160 lb me standing on the end of an 18"
breaker bar
would exert about that torque. I like this idea.
Richard Good told me that setting the wrench at 125 lbs and putting a 24"
pipe over it would yield about the right force.
Then I found these two formulas http://tinyurl.com/97faw7 &
http://tinyurl.com/774vwv which appear to work math-wise but where does the
extension go? Between the nut and the drive end of the wrench or can you
just slide a pipe over the wrench handle to extend it?
I've also heard that most shops would just hit it with their impact wrench
and call it a day.
These are CVJs and the 1-1/4" nut is an all steel grade 8 locking nut.
So....what's the best way to accomplish this....and buying a $200 torque
wrench is not the answer though I may just rent one if necessary.
Thanks
Bob
Bob Danielson
1975 TR6 CF38503U
Running w/ Throttle Body Injection
Toyota 5 Speed & Nissan LSD
http://tr6.danielsonfamily.org
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