| [GMCnet] JACKING UP THE GMC - some time honored ways [message #65047] |
Fri, 20 November 2009 11:57  |
KB
Messages: 1262
Registered: September 2009
Karma:
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Senior Member |
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The gmcmotorhome.info page is primarily about jacking the rear of the coach.
Unless I'm missing it, there's almost no info about the front. I've had no difficulty
jacking up the rear. Even replaced the whole rear suspension without mishap.
We put a floor jack under the center bogie housing to lift it-- no hook required.
To work on the housing, put supports for and aft of the rear suspension at
the reinforced areas.
The front though, is difficult. I have ramps, but that doesn't help if
I need to change a front tire, or work on the front suspension.
As we've demonstrated at least for our early coach, jacking as per the manual is a
really bad idea. Some folks have suggested jacking behind the front wheels, and others
have said that's bad. However, Bob Rosenberg's jack adapter plugs into a hole BEHIND
the front wheels. I don't understand why I'd need this adapter there as opposed to simply
placing a jack under that part of the frame (assuming the beast wasn't sitting on the ground).
But then we get back to the notion that jacking behind the front wheels is bad...
I guess my point is: there seems to be considerable disagreement on where/how
to jack up the front "correctly". Maybe I'm missing something, but I've found no
definitive "blessed" answers, especially for a solution we can carry on the road.
I sure don't intend to use the manual's version again if I can avoid it!
thanks,
Karen
1973 23' Patience Tester
>
> Here are some of the time honored ways to Jack up the GMC , safely and easly
> http://gmcmotorhome.info/rear.html#RAISING
>
> In here are blocks and ramps that will safely and easily, let you work under
> your GMC.
>
> If you are going under the GMC, you should expect an air bag or torson bar
> to fail at any time, and the GMC will go lower than a snake's belly when
> this happens. Rember the GMC weights 13,000 pounds so jack stands and jacks
> are always risky business.
>
> I use jack stands also, but I am sure they would pop out if there was a
> mechanical failure on the GMC. So to be safe, I always block the bogies,
> raise the GMC on ramps, use jack stands and jack hooks (all) when I am under
> the GMC.
>
> To change a wheel, the jack hook and plate, (shown above and in the GMC
> maint. manual), with releasing the air bag on that side (as described by
> KenB) will unload the wheel so it can easily be removed with out raising the
> whole GMC. There are jack hooks that will work on the front and the rear,
> to lift the GMC just enough to remove a wheel, or protect from mechanical
> failures.
> http://www.appliedgmc.com/prod.itml/icOid/625
> http://www.gmcmhphotos.com/photos/showgallery.php?cat=3312&ppuser=17
>
> be safe
> gene
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Karen
1975 26'
San Jose, CA
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