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Topic: Torque for torsion arms and stops
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April 03, 2011 at
11:17:36 AM
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What is the correct torque for the pinch bolts on aluminum torsion/pittman arms, and for the pinch bolts on both steel and aluminum stops? Not too worried about the steel ones, but I think excessive torque on the aluminum parts might not be good.
Thanks,
John
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April 03, 2011 at
11:12:46 PM
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This message was edited on
April 03, 2011 at
11:13:06 PM by Sprinter 79
Reply to:
Posted By: jbracing62 on April 03 2011 at 11:17:36 AM
What is the correct torque for the pinch bolts on aluminum torsion/pittman arms, and for the pinch bolts on both steel and aluminum stops? Not too worried about the steel ones, but I think excessive torque on the aluminum parts might not be good.
Thanks,
John
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I don't know if this absolutely correct but we were told that all of the 3/8 bolts in the system should be 37ft lbs. That would be the aluminum bolts on front stops and steel or titanium rear stops and the pitman arm. We check them regularly, once before every night and twice a night when the track gets stupid. (rough) Again, I do not know if this is absolutely correct, but the fellow who guides our team is an engineer and we have never had one break, back out (loosen up), or come apart. So, knock on wood, we will continue what has been working for us...........Jim..........Hope this helps
Never hit stationary objects!
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April 04, 2011 at
01:56:55 AM
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Reply to:
Posted By: jbracing62 on April 03 2011 at 11:17:36 AM
What is the correct torque for the pinch bolts on aluminum torsion/pittman arms, and for the pinch bolts on both steel and aluminum stops? Not too worried about the steel ones, but I think excessive torque on the aluminum parts might not be good.
Thanks,
John
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http://raskcycle.com/techtip/webdoc14.html
I don't aim to please.
I aim to hit the target.
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April 04, 2011 at
05:51:15 AM
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I've always used 28 ft lbs steel and aluminum. Never had a failure
do it in the dirt
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April 04, 2011 at
09:53:38 AM
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We have always used 25 ft lbs. A lot of people use 35 ft lbs but in my opinion it might be okay on the bolt, but it over clamps the stop and/or arm over time and they become difficult to install and remove from the bar.
Rome wasn't built in a day......but they sure didn't
waste any time burning it down!
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April 04, 2011 at
02:45:45 PM
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This message was edited on
April 04, 2011 at
02:47:03 PM by BLUTEAM
always subtract 30% of bolt spec when tightening into aluminum.....
The greatest knowledge is to know that you know nothing
at all.
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April 04, 2011 at
04:58:05 PM
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Just put it this way any 9/16 is 30 pounds.
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April 04, 2011 at
06:04:47 PM
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I go 25 ft/lbs in theory, but I set the wrench at about 32 ft/lbs since I like to use a 6" extension, because there is some torque lost in the torsion of the extension.
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April 04, 2011 at
06:57:06 PM
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Reply to:
Posted By: Ryan16r on April 04 2011 at 06:04:47 PM
I go 25 ft/lbs in theory, but I set the wrench at about 32 ft/lbs since I like to use a 6" extension, because there is some torque lost in the torsion of the extension.
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Laugh my ass off.....heard that one when I was 15...said huh then...ever go snipe hunting?
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April 04, 2011 at
07:31:40 PM
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Reply to:
Posted By: race88 on April 04 2011 at 06:57:06 PM
Laugh my ass off.....heard that one when I was 15...said huh then...ever go snipe hunting?
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True if you're using an extension on an impact. Ever seen the "torque stix" that they use at a tire shop?
Thanks for all the responses. All my stuff has through-bolts with nuts, so I don't have to worry about stripping out the threads. My biggest concern is overtorquing, and either warping or overstressing the splined hole on the aluminum parts. I think I've got some good numbers to go with now.
Thanks again,
John
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April 04, 2011 at
11:01:03 PM
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Reply to:
Posted By: jbracing62 on April 04 2011 at 07:31:40 PM
True if you're using an extension on an impact. Ever seen the "torque stix" that they use at a tire shop?
Thanks for all the responses. All my stuff has through-bolts with nuts, so I don't have to worry about stripping out the threads. My biggest concern is overtorquing, and either warping or overstressing the splined hole on the aluminum parts. I think I've got some good numbers to go with now.
Thanks again,
John
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Yeah, ours are through bolts with nuts also. I never considered the threaded stops. That may change things.
Never hit stationary objects!
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