Home » Public Forums » GMCnet » Jacking trivia
| Jacking trivia [message #208766] |
Sat, 25 May 2013 12:19  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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It has always been sugggested that you should dump the pressure in your bags when you jack up the rear of the coach. This can be done by putting the dash valves to travel while you jack it up. The coach goes up, leveling valve releases bag air trying to lower the coach. When you let it down it goes back to ride height.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Jacking trivia [message #208774 is a reply to message #208771] |
Sat, 25 May 2013 17:35  |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| SteveW wrote on Sat, 25 May 2013 14:00 |
| C Boyd wrote on Sat, 25 May 2013 10:19 |
It has always been sugggested that you should dump the pressure in your bags when you jack up the rear of the coach. This can be done by putting the dash valves to travel while you jack it up. The coach goes up, leveling valve releases bag air trying to lower the coach. When you let it down it goes back to ride height.
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Thanks !!
Does one still place an 11x3x.25 plate or a piece of leaf spring between the bogies ?? What keeps the bags from fully extending before the tire will leave the ground??
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If the plate lets the wheels hang lower that what would be ride height, the system should let the air out of the bags when the coach is jacked. (And the system thinks the rear is to high.) When the coach is lowered and the system senses it is below ride height, it'll pump the air bags back up. So using "the plate" would depend on if it still allowed the system to "work."
Note there are a few things to keep in mind:
1. The system works rather slowly and this might not be the best method for a "fast paced" shop. But it doesn't require a "tire monkey" to actually do anything... other than slow down.
2. The system needs to be "active." This is fairly easy for Power Level systems. Just leave it in travel with the key off until you lower the coach. Then turn on the key for the coach to lift itself off the lift. Either of the Electro-Level systems require power for both up and down. -- For a fast paced tire shop, it might be best to leave it in travel with the key in accessory. Just ask them to raise the coach a bit before breaking the lugs loose. (The system will let the pressure out as they do this.) They also should lower it slowly to keep the coach off the shop floor.
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
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| Re: [GMCnet] Jacking trivia [message #208794 is a reply to message #208793] |
Sat, 25 May 2013 23:11 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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can also be wood
http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2271.html
On Sat, May 25, 2013 at 9:10 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
> local metal shop
>
> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2272.html
>
> gene
>
>
>
> On Sat, May 25, 2013 at 9:10 PM, Mickey Space Ship Shuttle <
> mickeysss@me.com> wrote:
>
>>
>> can i order a pair of these from anyone?
>>
>> mickey :-)
>>
>> anaheim ca. 77palm beach
>>
>>
>>
>> On May 25, 2013, at 3:35 PM, Mike Miller wrote:
>>
>> >>
>> >> Thanks !!
>> >>
>> >> Does one still place an 11x3x.25 plate or a piece of leaf spring
>> between the bogies ?? What keeps the bags from fully extending before the
>> tire will leave the ground??
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Jacking trivia [message #208795 is a reply to message #208794] |
Sat, 25 May 2013 23:15 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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Senior Member |
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does anyone know what size the board needs to be as well please. That is easier to have made.
mickey :-)
anaheim ca 92812 77 palm springs
On May 25, 2013, at 9:11 PM, gene Fisher wrote:
> can also be wood
> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2271.html
>
>
> On Sat, May 25, 2013 at 9:10 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
>
>> local metal shop
>>
>> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2272.html
>>
>> gene
>>
>>
>>
>> On Sat, May 25, 2013 at 9:10 PM, Mickey Space Ship Shuttle <
>> mickeysss@me.com> wrote:
>>
>>>
>>> can i order a pair of these from anyone?
>>>
>>> mickey :-)
>>>
>>> anaheim ca. 77palm beach
>>>
>>>
>>>
>>> On May 25, 2013, at 3:35 PM, Mike Miller wrote:
>>>
>>>>>
>>>>> Thanks !!
>>>>>
>>>>> Does one still place an 11x3x.25 plate or a piece of leaf spring
>>> between the bogies ?? What keeps the bags from fully extending before the
>>> tire will leave the ground??
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>
>>
>>
>> --
>> Gene Fisher -- 74-23,77PB/ore/ca
>> “Give a man a fish; you have fed him for today --- give him a URL and
>> -------
>> http://gmcmotorhome.info/
>> Alternator Protection Cable
>> http://gmcmotorhome.info/APC.html
>
>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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| Re: [GMCnet] Jacking trivia [message #208796 is a reply to message #208794] |
Sat, 25 May 2013 23:18 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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Senior Member |
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If i change tires i must have these flat wedges?
or it tears out the shocks?
m 77 palm beach ca.
On May 25, 2013, at 9:11 PM, gene Fisher wrote:
> can also be wood
> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2271.html
>
>
> On Sat, May 25, 2013 at 9:10 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
>
>> local metal shop
>>
>> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2272.html
>>
>> gene
>>
>>
>>
>> On Sat, May 25, 2013 at 9:10 PM, Mickey Space Ship Shuttle <
>> mickeysss@me.com> wrote:
>>
>>>
>>> can i order a pair of these from anyone?
>>>
>>> mickey :-)
>>>
>>> anaheim ca. 77palm beach
>>>
>>>
>>>
>>> On May 25, 2013, at 3:35 PM, Mike Miller wrote:
>>>
>>>>>
>>>>> Thanks !!
>>>>>
>>>>> Does one still place an 11x3x.25 plate or a piece of leaf spring
>>> between the bogies ?? What keeps the bags from fully extending before the
>>> tire will leave the ground??
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>
>>
>>
>> --
>> Gene Fisher -- 74-23,77PB/ore/ca
>> “Give a man a fish; you have fed him for today --- give him a URL and
>> -------
>> http://gmcmotorhome.info/
>> Alternator Protection Cable
>> http://gmcmotorhome.info/APC.html
>
>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Jacking trivia [message #208798 is a reply to message #208794] |
Sun, 26 May 2013 01:23 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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Senior Member |
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thank you
mickey :-)
On May 25, 2013, at 9:11 PM, gene Fisher wrote:
> can also be wood
> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2271.html
>
>
> On Sat, May 25, 2013 at 9:10 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
>
>> local metal shop
>>
>> http://www.gmcmhphotos.com/photos/jacking-up-the-gmc-hooks-ramps-n-stuff/p2272.html
>>
>> gene
>>
>>
>>
>> On Sat, May 25, 2013 at 9:10 PM, Mickey Space Ship Shuttle <
>> mickeysss@me.com> wrote:
>>
>>>
>>> can i order a pair of these from anyone?
>>>
>>> mickey :-)
>>>
>>> anaheim ca. 77palm beach
>>>
>>>
>>>
>>> On May 25, 2013, at 3:35 PM, Mike Miller wrote:
>>>
>>>>>
>>>>> Thanks !!
>>>>>
>>>>> Does one still place an 11x3x.25 plate or a piece of leaf spring
>>> between the bogies ?? What keeps the bags from fully extending before the
>>> tire will leave the ground??
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>
>>
>>
>> --
>> Gene Fisher -- 74-23,77PB/ore/ca
>> “Give a man a fish; you have fed him for today --- give him a URL and
>> -------
>> http://gmcmotorhome.info/
>> Alternator Protection Cable
>> http://gmcmotorhome.info/APC.html
>
>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Jacking trivia [message #208799 is a reply to message #208796] |
Sun, 26 May 2013 02:08 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| mickeysss wrote on Sat, 25 May 2013 23:18 |
If i change tires i must have these flat wedges?
or it tears out the shocks?
m 77 palm beach ca.
|
NO NO NO
What breaks the shocks is leaving air pressure in the bag when you jack it up.
These metal or woods supports will not prevent you from breaking shocks and if you leave the air bag aired up these supports stand a chance of breaking the center bogie support casting.
All these do is save you a few inches on jacking height when removing a wheel. I have a couple of them stored somewhere in the coach but never bother to find and use them.
What is important is to get every bit of air out of the bags before raising the coach full up.
I jack mine up a few inches above normal ride height and then remove all air by disconnecting the air line at the bag. This takes about 15 seconds with a 9/16" open end wrench. After finishing my work I reconnect the air line and drop the coach slightly below normal ride height. Then I turn on the air system and let the bag inflate to normal ride height. After the bag has inflated to normal height I remove the jack.
Chuck's procedure ought to work also but I have never tried it. With mine you never worry about all of the air being gone and you never set foot in the coach until the final stage when you simply turn on the key and let it air up again.
Use the metal or wood pieces if you wish.
JUST REMEMBER TO REMOVE THEM BEFORE AIRING UP THE COACH AGAIN. As forgetful as I am I do not think it is worth the risk of forgetting.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Jacking trivia [message #208879 is a reply to message #208822] |
Sun, 26 May 2013 17:20 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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With the wheels off the ground, consider putting blocking under the frame in case the jacking method fails. A simple stack of 4 x 4's can save you a very nasty experience?
Tom, with lots of 4x4, 4x6, and 2x4 around the coach.
2012 Phoenix Cruiser model 2552
KA4CSG
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