Home » Public Forums » GMCnet » [GMCnet] Output shaft bolt size
| Re: [GMCnet] Output shaft bolt size [message #225070 is a reply to message #224907] |
Thu, 10 October 2013 11:31   |
emerystora
Messages: 4442
Registered: January 2004
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Jim
In one of you previous emails you refer to 80 lb-ft of torque on in this email you say 70 lb-ft. The GMC maintenance manual calls for 75 lb-ft.
Not much difference but I wanted to point out the factory manual specs.
Emery Stora
On Oct 8, 2013, at 6:56 PM, Jim Miller wrote:
> On Oct 8, 2013, at 8:15 PM, A. wrote:
>
>> Wired like this, how much can it loosen?
>> http://www.gmcmhphotos.com/photos/data/1/safetywired.jpg
>
> I did some quick research and found that the axial clamping force of a 180000 psi 3/8"-24 fastener at 70 lb-ft of torque is right around 10,000 lbs. This pressure is borne on the interface surface between the CV flange's bolt-hole perimeter and the surface under the head of the bolt. If for whatever reason that tremendous amount of friction cannot keep the bolt from loosening then I do not think a piece of 0.030 safety wire is going to stop it either - at least not for long.
>
> --Jim Miller
> 1977 Eleganza II
> 1977 Royale
> Hamilton, OH
>
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| Re: [GMCnet] Output shaft bolt size [message #225072 is a reply to message #225065] |
Thu, 10 October 2013 11:35 |
emerystora
Messages: 4442
Registered: January 2004
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My local Discount Tire shop has a calibration gauge mounted on the wall that they use to check their torque wrenches.
I have used it a couple of times to check mine.
Of course, one has no way of knowing if it is correct but when I used it my wrench always said the same as the gauge.
Emery Stora
On Oct 10, 2013, at 9:50 AM, Gary Worobec wrote:
> Hi Roy, who actually does torque wrench calibration?
>
>
> Thanks,
>
> Gary and Joanne Worobec
> 1973 GMC Glacier
> Anza, CA
>
>
>
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of roy@gmcnet.org
> Sent: Thursday, October 10, 2013 8:32 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Output shaft bolt size
>
>
>
> Gary you should check the calibration of that nice craftsman wrench. I sent
> my craftsman in for calibration back when I was working cause it was way out
> of calibration. A friend was tightening his head bolts on a ford a few years
> ago with his craftsman I could see he was pulling too hard on the wrench it
> was 50lbs out. The trick is to remember to set it back to zero after each
> use.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
> _______________________________________________
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| Re: [GMCnet] Output shaft bolt size [message #225079 is a reply to message #225065] |
Thu, 10 October 2013 12:46 |
Robert Burkitt
Messages: 41
Registered: February 2004
Location: Cincinnati, OH
Karma: 0
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Gary -
There are calibration labs around the country that can adjust and certify
your torque wrench, if you do a search you can find someone in your area or
around most industrial areas.
I did an Internet search and not only found a calibration service nearby in
Dayton, Ohio but one of their techs is a GMC owner, Don Heffner. The company
is Miller Engineering, their website is:
http://www.millercalibration.net/index.html
They do all types of torque wrenches from 2 inch pounds to 2000 foot
pounds - beam, click, click in both directions, dial and electronic. Average
cost for calibrating the typical click type that we use is about $42, about
$50 for a bi-directional click type.
At a local work rally several years ago we tested about a half dozen
wrenches against an electronic tool and found all to be very close to their
indicated torque settings.
Bob Burkitt Cincinnati 1977 Palm Beach 455
-----Original Message-----
From: Gary Worobec
Sent: Thursday, October 10, 2013 11:50 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Hi Roy, who actually does torque wrench calibration?
Thanks,
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of roy@gmcnet.org
Sent: Thursday, October 10, 2013 8:32 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Gary you should check the calibration of that nice craftsman wrench. I sent
my craftsman in for calibration back when I was working cause it was way out
of calibration. A friend was tightening his head bolts on a ford a few years
ago with his craftsman I could see he was pulling too hard on the wrench it
was 50lbs out. The trick is to remember to set it back to zero after each
use.
--
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Output shaft bolt size [message #225083 is a reply to message #225061] |
Thu, 10 October 2013 13:56 |
GMC_LES
Messages: 569
Registered: October 2009
Location: Montreal
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Actually Rob, as has been stated by more knowledgeable people here, if the bolt can work loose without lockwire, it will rotate even with lockwire. My opinion is that if done correctly with the right type of wire, it has a reasonable chance of reducing rotation provided the rest of the components are in decent shape. As i stated in an earlier message, it obviously depends on a lot of other circumstances and safety wire will not prevent loosening, it MIGHT limit it sufficiently to prevent a complete failure of the fastener and secured components.
Matt and jim have stated it pretty clearly. If the loosens on its own, there are other problems press
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Oct 10, 2013, at 10:54 AM, "Rob Mueller" <robmueller@iinet.net.au> wrote:
> Les,
>
> To make sure I've got it right in your opinion the inner CV joint bolts torqued to 75 ft lb as per the MM and safety wired properly
> with 0.032 stainless steel safety wire can turn allowing the bolt to loosen?
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Les Burt
>
> Rob,
>
> You suffering from CRS again?
>
> I'm sure you know this based on your previous employment.
>
> If you have played with lock-wire long enough you will have already discovered that the easy stuff to work with is quite soft. There
> are a varying assortment of wire specs out there and some of them are very stiff, making them prone to breaking if twisted or bent
> too tight. The most popular lock-wire among most techs is the soft stuff. The point here is that the softer wire will allow more
> stretch when put under tension, allowing some fastener rotation. Employing the stiffer wire may reduce stretch, but increases the
> risk of wire failure due to work hardening at any bend of the wire.
>
> Most aviation manufacturers have a specific spec stated in their manuals regarding what lock-wire to use. In rare situations It can
> actually vary depending on location, environment, etc. in such situations, techs can unknowingly use the same spec wire throughout
> a job.
>
> An example of two extremes might be flight control fasteners which see cool temps & low harmonics Versus an exhaust jet pipe which
> sees high temps and high harmonics. The specs may also come from different manufacturers as most aircraft use a variety of
> different sources.
>
> I think I've dragged this topic far enough off topic now.
>
> Lets see what is said about the 7/16 bolt hole size.
>
> Les Burt
> Montreal
> 1975 Eleganza 26ft
> A work in Progress
>
> _______________________________________________
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Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
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| Re: [GMCnet] Output shaft bolt size [message #225087 is a reply to message #225079] |
Thu, 10 October 2013 15:07 |
Gary Worobec
Messages: 867
Registered: May 2005
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A torque wrench calibration session might be a lot of fun at a rally. You
could place bets on who could come the closest to a set amount.
Thanks,
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Robert Burkitt
Sent: Thursday, October 10, 2013 10:46 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Gary -
There are calibration labs around the country that can adjust and certify
your torque wrench, if you do a search you can find someone in your area or
around most industrial areas.
I did an Internet search and not only found a calibration service nearby in
Dayton, Ohio but one of their techs is a GMC owner, Don Heffner. The company
is Miller Engineering, their website is:
http://www.millercalibration.net/index.html
They do all types of torque wrenches from 2 inch pounds to 2000 foot pounds
- beam, click, click in both directions, dial and electronic. Average cost
for calibrating the typical click type that we use is about $42, about
$50 for a bi-directional click type.
At a local work rally several years ago we tested about a half dozen
wrenches against an electronic tool and found all to be very close to their
indicated torque settings.
Bob Burkitt Cincinnati 1977 Palm Beach 455
-----Original Message-----
From: Gary Worobec
Sent: Thursday, October 10, 2013 11:50 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Hi Roy, who actually does torque wrench calibration?
Thanks,
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of roy@gmcnet.org
Sent: Thursday, October 10, 2013 8:32 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Gary you should check the calibration of that nice craftsman wrench. I sent
my craftsman in for calibration back when I was working cause it was way out
of calibration. A friend was tightening his head bolts on a ford a few years
ago with his craftsman I could see he was pulling too hard on the wrench it
was 50lbs out. The trick is to remember to set it back to zero after each
use.
--
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Output shaft bolt size [message #225113 is a reply to message #225067] |
Thu, 10 October 2013 19:01 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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We did that at the previous Amana rally. I have one of the electronic testers just like Bob's. Everyone brought their torque wrenches and tested them. I think the worse one was off by 10 foot-pounds.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Output shaft bolt size [message #225136 is a reply to message #225083] |
Thu, 10 October 2013 20:31 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Les,
OK, well in that case I disagree with you, Matt, and Jim.
When I return to Sydney I will do some testing.
Regards,
Rob M.
-----Original Message-----
From: Les Burt
Actually Rob, as has been stated by more knowledgeable people here, if the bolt can work loose without lockwire, it will rotate even
with lockwire. My opinion is that if done correctly with the right type of wire, it has a reasonable chance of reducing rotation
provided the rest of the components are in decent shape. As i stated in an earlier message, it obviously depends on a lot of other
circumstances and safety wire will not prevent loosening, it MIGHT limit it sufficiently to prevent a complete failure of the
fastener and secured components.
Matt and jim have stated it pretty clearly. If the loosens on its own, there are other problems press
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
_______________________________________________
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Output shaft bolt size [message #225142 is a reply to message #225136] |
Thu, 10 October 2013 21:07 |
Jim Miller
Messages: 501
Registered: March 2008
Karma: 10
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On Oct 10, 2013, at 9:31 PM, Rob Mueller wrote:
> OK, well in that case I disagree with you, Matt, and Jim.
Rob, add the FAA to the list that you disagree with. In the "Aircraft Inspection and Repair" manual (AC 43.13-1B) they state in Section 7, "Safetying":
"Safety wiring is not a means of OBTAINING nor MAINTAINING TORQUE rather it is a safety device to prevent the disengagement of screws, nuts, bolts, snap rings, oil caps, drain cocks, valves and parts".
I reiterate what I said in a previous posting: safety wire serves only to keep loose bolts in their holes until an inspector or mechanic can find them; it is not intended to maintain torque on said bolts. Maintaining torque is something they can and will do on their own if everything is in spec!
--Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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| Re: [GMCnet] Output shaft bolt size [message #225147 is a reply to message #225142] |
Thu, 10 October 2013 21:24 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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| Jim Miller wrote on Thu, 10 October 2013 22:07 |
On Oct 10, 2013, at 9:31 PM, Rob Mueller wrote:
> OK, well in that case I disagree with you, Matt, and Jim.
Rob, add the FAA to the list that you disagree with. In the "Aircraft Inspection and Repair" manual (AC 43.13-1B) they state in Section 7, "Safetying":
"Safety wiring is not a means of OBTAINING nor MAINTAINING TORQUE rather it is a safety device to prevent the disengagement of screws, nuts, bolts, snap rings, oil caps, drain cocks, valves and parts".
I reiterate what I said in a previous posting: safety wire serves only to keep loose bolts in their holes until an inspector or mechanic can find them; it is not intended to maintain torque on said bolts. Maintaining torque is something they can and will do on their own if everything is in spec!
--Jim Miller
|
Jim,
This is reminiscent of the instructor that told me an aircraft is a collection of parts flying in very close formation. Obviously, the safety wire is only there to keep any loose parts in formation.....
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Output shaft bolt size [message #225172 is a reply to message #225065] |
Fri, 11 October 2013 00:30 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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When I had it calibrated I took it to the Sears Roebuck tool outlet but that was some time ago I don't know if they even do that any more.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Output shaft bolt size [message #225186 is a reply to message #225136] |
Fri, 11 October 2013 07:54 |
GMC_LES
Messages: 569
Registered: October 2009
Location: Montreal
Karma: 0
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Ok,
We all agree to disagree at times and that is what makes many of our discussions so interesting.
I also want to do a few simple tests just to satisfy my own curiosity. If only to prove myself right or wrong. Ill see if i can find a few minutes at work to tinker with this a bit.
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Oct 10, 2013, at 9:31 PM, "Rob Mueller" <robmueller@iinet.net.au> wrote:
> Les,
>
> OK, well in that case I disagree with you, Matt, and Jim.
>
> When I return to Sydney I will do some testing.
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Les Burt
>
> Actually Rob, as has been stated by more knowledgeable people here, if the bolt can work loose without lockwire, it will rotate even
> with lockwire. My opinion is that if done correctly with the right type of wire, it has a reasonable chance of reducing rotation
> provided the rest of the components are in decent shape. As i stated in an earlier message, it obviously depends on a lot of other
> circumstances and safety wire will not prevent loosening, it MIGHT limit it sufficiently to prevent a complete failure of the
> fastener and secured components.
>
> Matt and jim have stated it pretty clearly. If the loosens on its own, there are other problems press
>
> Les Burt
> Montreal
> 1975 Eleganza 26ft
> A work in Progress
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
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| Re: [GMCnet] Output shaft bolt size [message #225190 is a reply to message #225113] |
Fri, 11 October 2013 08:12 |
GMC_LES
Messages: 569
Registered: October 2009
Location: Montreal
Karma: 0
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My employer probably has 1500 or more torque wrenches in service on the shop floor. All of them are subjected to calibration checks several times a year. Types in use are mostly click and dial type, but we also have flex beam, hydraulic piston, and electronic strain gauge versions. None of them are idiot proof.
It is amazing how little it takes to put any of them out of calibration. The click and dial types just need to be dropped on a concrete floor to mess them up. The click types need to be backed off after use or the accuracy starts to drift over time. The dial types have small clock type mechanisms and are even more fragile than the click types. The flex beams are about the most robust unless abused and subjected to forces above their max rating. The other more complex types depend on proper maintenance and cleaning to keep them in tune but they still get out of spec on a regular basis.
My employer replaces well over 100 torque wrenches each year due to uneconomical repair costs.
So if you have an old torque-wrench in your tool box that has seen some abuse, there is always the chance that it may not torque accurately over its full range.
Take good care of your torque-wrench and it will take care of you.
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Oct 10, 2013, at 8:01 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> We did that at the previous Amana rally. I have one of the electronic testers just like Bob's. Everyone brought their torque wrenches and tested them. I think the worse one was off by 10 foot-pounds.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
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| Re: [GMCnet] Output shaft bolt size [message #225199 is a reply to message #225142] |
Fri, 11 October 2013 09:16 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Guys,
I went back and re-read the entire thread and actually we actually don't disagree!
Below is what I said in a message on Wed, 09 October 2013 23:51:
Quote
BTW I agree with Jim that safety wire will not stop the bolts from coming loose IF they come loose because the bolt has stretched.
However, I can't see how a properly safety wired bolt (as pictured above) is going to turn and come loose.
Unquote
I NEVER said that a bolt that is safety wired can't loose torque. What is said was that I can't see how a bolt that was safety wired
properly could TURN and loose torque.
Once again here's the link to bolts properly safety wired:
http://tinyurl.com/mld7sm7
Note that the bolts are all safety wired in the tighten direction. I maintain that the only way they are going to be able to TURN is
(a) the safety wire stretches (b) there is slack in the twisted wire between the bolts.
Regards,
Rob M.
-----Original Message-----
From: Jim Miller
On Oct 10, 2013, at 9:31 PM, Rob Mueller wrote:
> OK, well in that case I disagree with you, Matt, and Jim.
Rob, add the FAA to the list that you disagree with. In the "Aircraft Inspection and Repair" manual (AC 43.13-1B) they state in
Section 7, "Safetying":
"Safety wiring is not a means of OBTAINING nor MAINTAINING TORQUE rather it is a safety device to prevent the disengagement of
screws, nuts, bolts, snap rings, oil caps, drain cocks, valves and parts".
I reiterate what I said in a previous posting: safety wire serves only to keep loose bolts in their holes until an inspector or
mechanic can find them; it is not intended to maintain torque on said bolts. Maintaining torque is something they can and will do
on their own if everything is in spec!
Jim
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Output shaft bolt size [message #225222 is a reply to message #225147] |
Fri, 11 October 2013 11:29 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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I see a duel at a rally somplace. Banana cream pies at three paces, no fair eating before you throw. My bux are on the Aussie - I duinno if he's right ior not, but I think he'd have the better arm.
Actually, I take Feynman's approach as stated in the Challenger report. The system was not designed for the bolts to loosen. If they are loosening, find out why and correct the problem. Once corrected, the wire isn't necessrary... but it woul look cool.
--johnny
--------------------------------------------
On Fri, 10/11/13, Matt Colie <matt7323tze@gmail.com> wrote:
Subject: Re: [GMCnet] Output shaft bolt size
To: gmclist@temp.gmcnet.org
Date: Friday, October 11, 2013, 2:24 AM
Jim Miller wrote on Thu, 10 October 2013 22:07
> On Oct 10, 2013, at 9:31 PM, Rob Mueller wrote:
>
> > OK, well in that case I disagree with you, Matt,
and Jim.
>
> Rob, add the FAA to the list that you disagree with. In
the "Aircraft Inspection and Repair" manual (AC 43.13-1B)
they state in Section 7, "Safetying":
>
> "Safety wiring is not a means of OBTAINING nor
MAINTAINING TORQUE rather it is a safety device to prevent
the disengagement of screws, nuts, bolts, snap rings, oil
caps, drain cocks, valves and parts".
>
> I reiterate what I said in a previous posting: safety
wire serves only to keep loose bolts in their holes until an
inspector or mechanic can find them; it is not intended to
maintain torque on said bolts. Maintaining torque is
something they can and will do on their own if everything is
in spec!
>
> --Jim Miller
Jim,
This is reminiscent of the instructor that told me an
aircraft is a collection of parts flying in very close
formation. Obviously, the safety wire is only there to
keep any loose parts in formation.....
Matt
--
Matt & Mary Colie
'73 Glacier 23 Chaumière (say show-me-air)
Now with 4 working Rear Brakes
SE Michigan - Twixt A2 and Detroit
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Output shaft bolt size [message #225243 is a reply to message #225222] |
Fri, 11 October 2013 13:19 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Johnny Bridges wrote on Fri, 11 October 2013 12:29 |
<Snip - Banana cream pies at three paces>
Actually, I take Feynman's approach as stated in the Challenger report. The system was not designed for the bolts to loosen. If they are loosening, find out why and correct the problem. Once corrected, the wire isn't necessrary... but it woul look cool.
--johnny
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Johnny,
When I was young, foolish and still racing motortoys of some nature or other, I discovered something I really liked about safety wire. When doing the pre-race inspections, if the safety wire is intact, that fastener is probably good. If I found a safety wire broken, that assembly was usually in some kind of trouble. I also did find safety wires broken and fasteners still sound, but the inspection gave me the opportunity ensure that there was no cause for concern.
I tried paint type indicators, but they require careful cleaning before inspection (not easy for dirt bikes) and sooner or later the entire cover has been painted around each fastener.
Would I still be using safety wire if I were racing?
You Bet. As I have been known to say..
"I may be paranoid, but I am OLD and paranoid."
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Output shaft bolt size [message #258196 is a reply to message #258188] |
Fri, 08 August 2014 15:54 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Hal,
The last time this was discussed I suggested safety wiring them to make sure they didn't come loose cause that's what we did with
parts while was in the USAF and at Hamilton Standard.
I was told that drilling the heads might weaken the bolts and cause a failure by one GMCer and a second pointed me to a FAA spec
that noted that safety wire would not keep a bolt from loosing torque through stretching. Both of those statements are correct.
However, I would like the following question answered:
Which of the following is most likely to happen:
1) The bolts loosen, fall out and the inner CV joint comes loose and whips around?
2) The safety wired bolts loose torque and the flange slips clockwise and counterclockwise until the bolts are worn away a
sufficient amount to shear and the inner CV joint comes loose and whips around?
3) Enough of the safety wired bolts fail allowing the inner CV joint to come loose and whip around.
:>)
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Hal Kading
Sent: Friday, August 08, 2014 1:58 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Output shaft bolt size
Has anyone observed any sheared bolts in the axle flanges? I have seen loose ones but never any sheared. When they are loose you
will have a vibration
similar to a bad CV joint.
Hal Kading 78 Buskirk Las Cruces NM
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Output shaft bolt size [message #258201 is a reply to message #258196] |
Fri, 08 August 2014 16:15 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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I have a friend who lost the bolts in his driver's side flange in the middle of Canyonlands National Park in Utah. He walked back along the road and found three bolts about a 1/4 mile or so back. He put those bolts into his axle flange and made it back out to civilization.
Emery Stora
On Aug 8, 2014, at 2:54 PM, Rob Mueller wrote:
> Hal,
>
> The last time this was discussed I suggested safety wiring them to make sure they didn't come loose cause that's what we did with
> parts while was in the USAF and at Hamilton Standard.
>
> I was told that drilling the heads might weaken the bolts and cause a failure by one GMCer and a second pointed me to a FAA spec
> that noted that safety wire would not keep a bolt from loosing torque through stretching. Both of those statements are correct.
>
> However, I would like the following question answered:
>
> Which of the following is most likely to happen:
>
> 1) The bolts loosen, fall out and the inner CV joint comes loose and whips around?
>
> 2) The safety wired bolts loose torque and the flange slips clockwise and counterclockwise until the bolts are worn away a
> sufficient amount to shear and the inner CV joint comes loose and whips around?
>
> 3) Enough of the safety wired bolts fail allowing the inner CV joint to come loose and whip around.
>
> :>)
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> USA '75 Avion - Double Trouble TZE365V100426
> AUS '75 Avion - The Blue Streak TZE365V100428
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Hal Kading
> Sent: Friday, August 08, 2014 1:58 PM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Output shaft bolt size
>
> Has anyone observed any sheared bolts in the axle flanges? I have seen loose ones but never any sheared. When they are loose you
> will have a vibration
> similar to a bad CV joint.
>
> Hal Kading 78 Buskirk Las Cruces NM
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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