I dared to doubt the advice of a fellow lister, Lee Janssen. As punishment
to myself, I will now explain and expose my faux pas for all to see, and
maybe learn from. I asked about why my TR6 pinion flange nut was only on
finger-tight when the manual specs the torque for 90-120 "lb. ft."
Lee Janssen wrote:
>Read your manual once more and notice that it states 90 to 120 "lbf in".
>"lbf in" stands for 'pounds of force inch' or in 'merican 'inch pounds'.
>That equates to 7.5 to 10 foot pounds. That is consistent with your opinion
>that it was torqued to about 5 foot pounds.
So, I opened up the Bentley manual to "Torque Wrench Settings", page 54,
and under "Rear Axle" I found "Prop shaft flange to pinion" Across from
that are the numbers 90 to 120. Follow the column up to the heading and it
reads "Specified Torque (lbf.ft)"
So I started writing a reply to Lee to correct him, and then I thought,
"But, hey! What if it's a misprint? This guy couldn't have just made it
up!" So, I opened the book again and turned to page 346, (51.25.19 Sheet
5, item 29) and it states in pertinent part, "...when the castellated nut
is tight to a torque loading of 90 to 120 lbf in (12.4 to 16.6 kgf m).
I hate it when I have to admit I'm wrong TWICE IN A ROW!!
Well, at least I didn't read it wrong. At least I can blame it on the manual!!
Lesson learned: Don't trust the "quick reference" listings for torque
specs in the front of the manual!!
Humbly,
Pete Chadwell
1973 TR6
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