Home » Public Forums » GMCnet » [GMCnet] JACKING UP THE GMC - some time honored ways
| [GMCnet] JACKING UP THE GMC - some time honored ways [message #65047] |
Fri, 20 November 2009 11:57  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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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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| Re: [GMCnet] JACKING UP THE GMC - some time honored ways [message #65118 is a reply to message #65047] |
Fri, 20 November 2009 20:16  |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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Karen,
No one ever seems to remember that these coaches are all very
different.
According to the service bulletins, GMC added some extra pieces
to the
front bumper attachments in later years. We have two 77s, and I
have
jacked them up with the factory jack while on the road. While
hanging
on the front bumper jack, I have crawled inside the front
wheelwell with
a flashlight in my teeth to make some needed repairs to get home.
When I'm home, I have a HF long reach floor jack that will raise
30 inches,
but when on the road. I do what is necessary. Possibly I'm dumb
lucky,
but I've never bent or broken frames, windshields, or whatever.
Again, from what I've seen and heard here, the later coaches seem
to be
able to take more abuse, but know your limits and don't exceed
them.
Gary Kosier
77EII & 77PB
Newark, Ohio
----- Original Message -----
From: "KB" <kab7@sonic.net>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, November 20, 2009 12:57 PM
Subject: [GMCnet] JACKING UP THE GMC - some time honored ways
> 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
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] JACKING UP THE GMC - some time honored ways [message #67351 is a reply to message #65047] |
Sun, 13 December 2009 16:23 |
Gary Worobec
Messages: 867
Registered: May 2005
Karma: -1
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Senior Member |
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Do not jack the front of the coach only on one side or you will crack a
front window. Ask me how I know. Coach should be lifted from the center
front if going up very high. Changing a tire is a bit of a different deal
but even then be careful on the height.
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
----- Original Message -----
From: "KB" <kab7@sonic.net>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, November 20, 2009 9:57 AM
Subject: [GMCnet] JACKING UP THE GMC - some time honored ways
> 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
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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