Safarigard 3-link rockguard BEWARE ! - Defender Source
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  #1  
Old April 25th, 2007, 10:02 PM
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JORGE ESPINOZA
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Safarigard 3-link rockguard BEWARE !

I just replaced both 7/16 bolts used in the rockguard mount to diff housing. Both bolts had sheared off and the broken studs took some time to remove. To all with a SG 3-link please check your hardware . Symptoms , knocking sound ,clicking sound when brake is applied . Once again please check your hardware , other than this problem I'm very satisfied with the performance of the 3-link .
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  #2  
Old April 25th, 2007, 10:18 PM
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It should take over 30,000 LB of force to sheer off two 7/16 bolts. Something was very odd.
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  #3  
Old April 25th, 2007, 10:54 PM
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I think Keith drove for a while without the center attatched after the toy convert. IMHO
To shear 2 7/16's grade 8 bolts takes some doing! They were grade 8's?
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  #4  
Old April 26th, 2007, 03:35 AM
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One possible explanation, based on something I've encountered. Those bolts seem to have a habit of getting loose. Generally I hear this pretty soon, crawl under the truck, and tighten them back up. But if they were allowed to stay loose, especially for an extended time, you'd have the RockGard bashing against them. They'd be subjected not just to shear, but to bending as well.

Also, are they really 7/16"? I seem to remember something about those being an unusual pattern, maybe BSF? It's been awhile, but I seem to remember that part (maybe all) of the problem I was having stemmed from someone along the line replacing them with the wrong threads.

I don't have the SG 3-link, just the stand-alone RockGard, but I believe the attachment design is identical.
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  #5  
Old April 26th, 2007, 07:17 AM
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Jim C.
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Those symptoms are very similar to worn bushings on the radius arms. Could that kind of play contribute to the failure?
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  #6  
Old April 26th, 2007, 07:34 AM
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I have had to re build several brand new SG 3 links were the rock guard attaches to the diff due to the mounting being far from close (1/4-3/8) from the diff housing. If the 7/16 bolts are used to draw this gap tight it does leave the bolts under some fairly high tension , and probably more likely to break.

I've installed many of these and SG are well aware of the issue......they claim sloppy manufacturing tolerances at the Rover axle assembly line......shocker.
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  #7  
Old April 26th, 2007, 08:29 AM
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I too have installed 3-4 of these & I shim the gap before I snug the bolts & red locktight the shit out of them.
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  #8  
Old April 26th, 2007, 08:48 AM
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Could you guys expand on this a little more? I need to replace the bushings and suspect the bolts as well since my 3-link has been showing wear and allowing the front axle to rotate a hair back and forth. I'm planning on addressing this hopefully in the next few weeks and would like to hear more of what people are doing.
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  #9  
Old April 26th, 2007, 10:36 AM
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Jorge! did i see you on Ave B or C time to time? where do you fix your truck? in the city?
I have some problem with my 90, I need some advice..
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  #10  
Old April 26th, 2007, 12:02 PM
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Were the correct bolts installed? So it had been tapped up to 7/16?

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  #11  
Old April 26th, 2007, 01:41 PM
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Keith Kreutzer
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I still have an unsupported rock gaurd (no bolts) things seem to be holding well and I fequently try to bend the thing with no success . I will at some point take it out and add some metal to reinforce if I don't change the whole thing out for something different first.
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