| Jacking the GMC up [message #158247] |
Fri, 27 January 2012 22:15  |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
|
Senior Member |
|
|
You blow a tire on the road.... whats the best way to jack up the gmc? As far as what type of jack is best, and where is best to use it on the vehicle?
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
|
|
|
|
|
|
| Re: Jacking the GMC up [message #158250 is a reply to message #158247] |
Fri, 27 January 2012 22:32  |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
|
Senior Member |
|
|
Both- I haven't blown any tire yet but want to be prepared.
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
|
|
|
|
| Re: Jacking the GMC up [message #158265 is a reply to message #158247] |
Sat, 28 January 2012 00:01 |
Craig Lechowicz
Messages: 541
Registered: October 2006
Location: Waterford, MI
Karma: 0
|
Senior Member |
|
|
For the rear, the jack hooks that are available at several places (Jim K, Ragusa, I think a few others) that hook into the bogie and use a bottle jack is probably easiest. I think Jim K sells one that can be used both on the rear bogies and under a front control arm. Unfortunately, I got my Ragusa one before I knew that. I've picked up a couple of those surplus 2-stage Ford truck bottle jacks that might go low enough to get under the front end with a flat tire, but I really need to try it. I still carry the old original GMC jack with me, just in case it doesn't, but I hear it is hard on bumpers.
Craig Lechowicz
'77 Kingsley, Waterford, MI
|
|
|
|
| Re: Jacking the GMC up [message #158267 is a reply to message #158250] |
Sat, 28 January 2012 00:06 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
Get a short stubby 2 stage hydraulic jack and a jack hook. (Jim K and other have them. Use the jack hook and hydraulic jack for the rears. Use just the hydraulic jack under the lower A-frame near the ball joint for the front.
If jacking the rear, do not forget to deflate the air bag after you have raised the coach a little and have some of the weight of the coach on the jack. You do not want to over compress the shock by jacking the coach too high with air pressure on the bag.
Break the lug nuts loose 1/2 turn before you start jacking up the coach.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
| Re: [GMCnet] Jacking the GMC up [message #158270 is a reply to message #158267] |
Sat, 28 January 2012 01:43 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Our HD Jack adapter works on both and the back.
We also stock the squaty hydraulic jack.
We warranty the Jack for at least 3 years.
Suggest you use the jack few times to break it in and see that it works well.
On Fri, Jan 27, 2012 at 10:06 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> Get a short stubby 2 stage hydraulic jack and a jack hook. Â (Jim K and other have them. Â Use the jack hook and hydraulic jack for the rears. Â Use just the hydraulic jack under the lower A-frame near the ball joint for the front.
>
> If jacking the rear, do not forget to deflate the air bag after you have raised the coach a little and have some of the weight of the coach on the jack. Â You do not want to over compress the shock by jacking the coach too high with air pressure on the bag.
>
> Break the lug nuts loose 1/2 turn before you start jacking up the coach.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: Jacking the GMC up [message #158272 is a reply to message #158247] |
Sat, 28 January 2012 04:35 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
|
Senior Member |
|
|
I carry a floor jack. Versatile and keeps you out from under the coach while you're jacking. If you see the jack start to roll, you know you're not chocked sufficiently. With a bottle jack, I'd be afraid of finding out the hard way.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
|
|
|
|
|
|
| Re: Jacking the GMC up [message #158274 is a reply to message #158247] |
Sat, 28 January 2012 05:03 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
|
Senior Member |
|
|
At Discount Tire I briefed one kid on how and where to jack, then another kid shows up. "Are you going to be the one jacking up my motorhome?" I ask. "Yeah" So I brief him. Then a third comes by ready to jack under the generator. "No, wait! Are YOU going to be the one jacking up my motorhome?" "Yeah"
Are you beginning to see where this is going?
Eventually 6 separate people were told to jack between the rear wheels and jack in the center of the front crossmember and the kid who eventually did it jacked the whole coach up with 4 jacks at once and did a very good job.
The windshield lived to tell the tale!
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
|
|
|
|
|
|
|
|
|
|
| Re: Jacking the GMC up [message #158294 is a reply to message #158247] |
Sat, 28 January 2012 08:57 |
Galen
Messages: 146
Registered: November 2011
Location: New Virginia, IA
Karma: 0
|
Senior Member |
|
|
Speaking of the FORD dual stage jack, does anyone know off hand what years/models of trucks this jack was used on? Need to run by the salvage yards anyway, and I could use one or two of those beyond the use of the GMC, if they aren't too obscure. Thanks.
Galen Briggs
New Virginia, Iowa
1978 Palm Beach
|
|
|
|
| Re: Jacking the GMC up [message #158305 is a reply to message #158267] |
Sat, 28 January 2012 11:18 |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Ken Burton wrote on Fri, 27 January 2012 22:06 |
...
If jacking the rear, do not forget to deflate the air bag after you have raised the coach a little and have some of the weight of the coach on the jack. You do not want to over compress the shock by jacking the coach too high with air pressure on the bag. ...
|
You can to this "automagically" by leaving the system in travel.
As the coach is raised by the jacks, the system releases air from the bag attempting to lower the coach back to ride height. With enough time, it will fully deflate the bags.
When the coach is lowered it will go all the way down then the system will pump up the bags and lift the coach off the jacks. The power level will do the first part with no power but will need power, or compressed air, to raise off the jacks. The EL systems would need to be left in accessory to power the system.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
| Re: [GMCnet] Jacking the GMC up [message #158325 is a reply to message #158305] |
Sat, 28 January 2012 16:54 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Mike,
Brilliant!
I checked the 1976 Operating Manual I have to see if GMC instructions include this but nope. The reason I did that was because the
fact that the system did this might have been one of the reasons they installed the automatic leveling system.
Yeah, I know, pretty lame reason but it might have been considered.
Regards,
Rob M.
-----Original Message-----
From: Mike Miller
You can to this "automagically" by leaving the system in travel.
As the coach is raised by the jacks, the system releases air from the bag attempting to lower the coach back to ride height. With
enough time, it will fully deflate the bags.
When the coach is lowered it will go all the way down then the system will pump up the bags and lift the coach off the jacks. The
power level will do the first part with no power but will need power, or compressed air, to raise off the jacks. The EL systems
would need to be left in accessory to power the system.
--
Mike
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
|
|
| Re: Jacking the GMC up [message #158368 is a reply to message #158247] |
Sat, 28 January 2012 22:18 |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
|
Senior Member |
|
|
I notice the bottle jacks can be VERY expensive. The one Jim K sells is only $40, but then I have to buy a jack hook and its $80. Is there any advantage to go any other way. The one he sells looks compact and its not all that expensive. $80 for the hook is rough on the wallet at the moment however.
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
|
|
|
|
| Re: Jacking the GMC up [message #158371 is a reply to message #158247] |
Sat, 28 January 2012 22:31 |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
|
Senior Member |
|
|
I wanted to thank everyone so far for the help. The links were nice. There was only one linK i wanted more info. I couldn't find the pic of where the hook actually goes. There was TONs of pics there. The more I'm checking into this a stubby jack maybe the best way to go.
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
|
|
|
|
| Re: [GMCnet] Jacking the GMC up [message #158375 is a reply to message #158371] |
Sat, 28 January 2012 22:58 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
IIRC, when I had a flat on the rear, only my REALLY stubby jack, about 6"
tall (1 ton), could be fitted under the frame to raise the body (& bogie)
high enough to get the jack hook into position and high enough for a REAL
jack (6 ton) to fit and do the heavy lifting. I could be mistaken, but I
don't think all jack hooks can be used until the body's raised from
full-flat. Maybe I failed to raise the suspension to full UP?
If you don't carry a VERY short jack, you should test before travelling.
Ken H.
On Sat, Jan 28, 2012 at 11:31 PM, Michael wrote:
>
>
> I wanted to thank everyone so far for the help. The links were nice. There
> was only one linK i wanted more info. I couldn't find the pic of where the
> hook actually goes. There was TONs of pics there. The more I'm checking
> into this a stubby jack maybe the best way to go.
> --
> ***"Gettin There"-1973 23' Sequoia-
> Michael, Casa Grande, AZ
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: Jacking the GMC up [message #158383 is a reply to message #158267] |
Sun, 29 January 2012 00:37 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
| Ken Burton wrote on Sat, 28 January 2012 00:06 |
Get a short stubby 2 stage hydraulic jack and a jack hook. (Jim K and other have them. Use the jack hook and hydraulic jack for the rears. Use just the hydraulic jack under the lower A-frame near the ball joint for the front.
If jacking the rear, do not forget to deflate the air bag after you have raised the coach a little and have some of the weight of the coach on the jack. You do not want to over compress the shock by jacking the coach too high with air pressure on the bag.
Break the lug nuts loose 1/2 turn before you start jacking up the coach.
|
The reason I suggested this combination is it is fairly small to carry, will do the job in an emergency, and you will probably never need it. So why carry more than necessary? I also carry the correct size 3/4" drive socket on a long breaker bar to get the lug nuts loose. I have never blown a tire but I did change one on the road once because it was wearing funny and I was starting to hear it. The hardest part was getting those heavy tires off and back on the rear tire carrier. It took about 15 minutes total to swap the old and new wheels/tires. I do check my air pressures all the way around before I leave on a trip and I check the tire temps with my hand on every stop.
I subscribe to the Michelin recommended 10 year tire replacement schedule for RVs and I rotate them on the same side every 3 years. I also inspect them thoroughly every spring prior to my first trip. It only take a few minutes to jack them up and spin them to see both the inside and outsides of all tires.
One last comment on deflating the air bags. After jacking the coach slightly, I set the height control switches to lower and then disconnect the hose at the bags. Then the rear tires do not have to be completely off of the ground to remove one of them. You can get the wheels off with the bogie hanging and you can place the replacement wheel back on by catching it on only one lug bolt and rotating the tire. Or after removing the wheel, you can lift the bogie arm by hand to the desired level and insert a piece of metal or a wedge in the bogie to keep it from dropping again. I have the metal pieces to do this but I never use them.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
