Proper Way to check critical fastner torque?
#1
06-19-2007, 11:16 PM
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Proper Way to check critical fastner torque?
Thinking of doing my 1k service myself, what I don't really understand is the proper way to check the torque of the critical fasnters list. I have the proper torque wrenches and know how to use them but do I first loosen the bolts then torque or set the torque wrench and just try and tighten the bolts?
#4
06-20-2007, 12:15 AM
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#6
06-20-2007, 12:36 AM
RE: Proper Way to check critical fastner torque?
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
The item being torqued (nut or bolt) must be still moving as the specified torque is reached and attained(if you continue to apply torque after this point you are now working against the friction of two surfaces that have mated resulting in an error reading. Plus over a period of time these "set" with heat/ cool cycles, corrosion etc so any further checking will result in an erroneous reading.)
Many new torque specs also include a stretch amount and a degree of turn after the initial
torque.
So you definitely need to read the manual on these specfic items to see what the specified torque amount is, and how is it applied.
If you are not familiar with the above procedures thenyou do not know how to use the tools properly.
So yes to do it properly you need to loosen and retorque per the instructions in the appropriate service manual.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
The item being torqued (nut or bolt) must be still moving as the specified torque is reached and attained(if you continue to apply torque after this point you are now working against the friction of two surfaces that have mated resulting in an error reading. Plus over a period of time these "set" with heat/ cool cycles, corrosion etc so any further checking will result in an erroneous reading.)
Many new torque specs also include a stretch amount and a degree of turn after the initial
torque.
So you definitely need to read the manual on these specfic items to see what the specified torque amount is, and how is it applied.
If you are not familiar with the above procedures thenyou do not know how to use the tools properly.
So yes to do it properly you need to loosen and retorque per the instructions in the appropriate service manual.
#7
06-20-2007, 12:45 AM
RE: Proper Way to check critical fastner torque?
ORIGINAL: choochoo
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
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#8
06-20-2007, 01:34 AM
RE: Proper Way to check critical fastner torque?
Noooooo!
You can pretty much presume the nicks and burrs are now gone after a factory assembly.
But to do a torque RIGHT the torque must be done in accordance with the specification (service) manual for that bolt.
If it says torque it dry then do it dry, if it says lightly lubricated then that way.
And if it say to a degree past the base torque etc etc etc.
But as we all should know and some don't.
Torque for example a primary cover bolt and then try to remove it a couple years later.
seems to have gotten tighter doesn't it (how many have stripped out the headwith the bit or screwdriver)? that is the "set" from hot / cold cycles and some corrosion that may have gotten in.
If you just apply a torque wrench to it set at the proper spec, the reading will be errroneous.
sure the bolt may be tight but the reading won't be correct.
The guy asked for the RIGHT way.
Right way to be correct is to loosen and re torque. And if dirt and rust etc, is apparent then the parts should be cleaned.
Are we all going to do it??? Of course not. But it is the right way, to ensure accuracy.
You can pretty much presume the nicks and burrs are now gone after a factory assembly.
But to do a torque RIGHT the torque must be done in accordance with the specification (service) manual for that bolt.
If it says torque it dry then do it dry, if it says lightly lubricated then that way.
And if it say to a degree past the base torque etc etc etc.
But as we all should know and some don't.
Torque for example a primary cover bolt and then try to remove it a couple years later.
seems to have gotten tighter doesn't it (how many have stripped out the headwith the bit or screwdriver)? that is the "set" from hot / cold cycles and some corrosion that may have gotten in.
If you just apply a torque wrench to it set at the proper spec, the reading will be errroneous.
sure the bolt may be tight but the reading won't be correct.
The guy asked for the RIGHT way.
Right way to be correct is to loosen and re torque. And if dirt and rust etc, is apparent then the parts should be cleaned.
Are we all going to do it??? Of course not. But it is the right way, to ensure accuracy.
ORIGINAL: Bryan1724
Sooooooo what your saying is to remove the nuts and bolts, clean them, deburr, wire wheel em................................... and put em back in and torque em down? [sm=insomnia.gif]
ORIGINAL: choochoo
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
#9
06-20-2007, 01:40 AM
RE: Proper Way to check critical fastner torque?
ORIGINAL: choochoo
The guy asked for the RIGHT way.
Right way to be correct is to loosen and re torque. And if dirt and rust etc, is apparent then the parts should be cleaned.
Are we all going to do it??? Of course not. But it is the right way, to ensure accuracy.
The guy asked for the RIGHT way.
Right way to be correct is to loosen and re torque. And if dirt and rust etc, is apparent then the parts should be cleaned.
Are we all going to do it??? Of course not. But it is the right way, to ensure accuracy.
ORIGINAL: Bryan1724
Sooooooo what your saying is to remove the nuts and bolts, clean them, deburr, wire wheel em................................... and put em back in and torque em down? [sm=insomnia.gif]
ORIGINAL: choochoo
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
To do the job properly you all better go back and read the book.
To properly ensure a fastener is correctly torqued several things must be correct.
clean and dry and freeof nicks, burrs, rust oil etc.
(unless the torque value specifically specifieslightly lubricated)
(this is NOT all inclusive but general)
#10
06-20-2007, 01:44 AM
RE: Proper Way to check critical fastner torque?
twilliams, get the service manual and a good torque wrench and go at it. Don't get caught up in this "loosen to check"[:@]stuff, it is not required on these critical fasteners norare there any torque to yield fasteners in the critical torque chart.You"ll have to lift the tank to get at the top stabilizer/engine mount. Put a wrench on the Jam nuts and you"ll be fine. Good luck!
Streeter
07 FLHXI
Streeter
07 FLHXI