60-0 brake test fail. - Defender Source
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  #1  
Old March 28th, 2013, 12:22 PM
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Chris
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60-0 brake test fail.

http://www.youtube.com/watch?feature...&v=gwEo5OHHoKE

What the heck happened????

As someone who has recently replaced bushings I sure hope I tightened all the nuts!
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  #2  
Old March 28th, 2013, 12:30 PM
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Awesome video! - kinda sad too at the same time.

up up and UP armored = up up and UP stresses on all suspension components. you saw the oscillating everything going on there, stress was greater than the strength of something, component, or connection. Either something that was already fatigued, or just something that wasn't up to the task.


That's why they do these tests in the first place!
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Old March 28th, 2013, 12:40 PM
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Quote:
Originally Posted by Fearnofish View Post
http://www.youtube.com/watch?feature...&v=gwEo5OHHoKE

What the heck happened????

As someone who has recently replaced bushings I sure hope I tightened all the nuts!
Could be several things. Obviously the brake bias is WAY off.
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  #4  
Old March 28th, 2013, 12:50 PM
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I was thinking of the trailing arm attachments. I just double checked mine


This one makes me want to call safety devices right now.
http://www.youtube.com/watch?feature...&v=N309xX663cY
Take it easy around the corners boys.
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Old March 28th, 2013, 01:14 PM
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That's why you test 'm
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Old March 28th, 2013, 01:17 PM
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This is the reason they do this. To see what fails and beef up that part(s).
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  #7  
Old March 28th, 2013, 01:22 PM
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M1 tank doesn't do that crap; it might throw you out like a bucking bronco, but it'll stop on a dime in about that same distance (and ripple the asphalt like cheap carpet).

They don't make war like they used to.
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Old March 28th, 2013, 01:31 PM
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That is a partial system failure test under FMVSS 121 air brake systems. The front brakes are not even hooked up for this test and they are relying only on one circuit apply at the rear, and the rear probably has ABS too making it buck like crazy. These tests are never very pretty and usually look like all hell is breaking loose, cause it is. Keep in mind that most OTR trucks have almost no suspension and these military machines have lots of travel, which exacerbates this type of problem...

Whether this is a pass or a fail is debatable, IIRC the standard says you have to stop before those cones once in five tries, so if this is the second try, it might actually be a pass
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Old March 28th, 2013, 01:48 PM
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It needs better trailing arms. I don't care what kind of external latex they paint on that story. No kind of braking should lead to an axle coming off.
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