| [GMCnet] Re: WHERE TO INSERT BLOCKING AT THE BOGIES [message #366240 is a reply to message #366239] |
Fri, 20 August 2021 11:48   |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma:
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Senior Member |
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Uh, there's NO WAY a 2x4 would do anything if put on top of the airbags, the bags are significantly bigger than the bogie mounts, even the cones are bigger.
If there was no airbag, then it could work, but I'd rather use a 4x4.
Or maybe you could put something below the bags? Kinda weird though
Keith Vasilakes
Mounds View MN
76 exRoyale
MicroLevel
________________________________
From: RJW
Sent: Friday, August 20, 2021 11:27 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: WHERE TO INSERT BLOCKING AT THE BOGIES
Richard RV wrote on Fri, 20 August 2021 12:00
> This is the first time I've heard of using a 2x4 block just above the bogey box casting. Trying to get my head around the forces involved.
>
> It seems to me that the ~2000# wheel load acting on the ~18" horizontal bogey arm lever would potentially crush the end of the 2x4 which has to
> counteract that same load but using a much shorter (maybe ~6"?) lever arm along the vertical bogey arm. That would put the load on the 2x4 very
> close to the ultimate crushing strength, of say Doug-Fir, parallel to the grain. The curved bogey arm wouldn't present much bearing area initially,
> but would compress and potentially start cracking along the grain.
>
> Again, first time hearing about this and I have no experience with it and Jim K does. Anyone else use the word block above the bogey box?
>
> If there's no danger of the wood crushing and splitting it certainly would be the fastest way to relieve pressure on the airbags. Blocking under
> the bogey boxes and relieving pressure on the airbags takes more time, but takes pressure off of both the airbags and tires.
>
> Richard
I also am not understanding how the above the bogey arm blocking works. Ever since day one, 23 years ago, I've just put some 4x4 and 2x4 x ~ 24"
pieces under each casting to desired height. I pretty much use wood cribbing to support the coach, rather than jack stands which I think could move,
when I work under the coach.
--
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water
heaters.
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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