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| Re: Best Jack Adapter [message #351933 is a reply to message #351931] |
Tue, 04 February 2020 19:19   |
MikeB
Messages: 133
Registered: December 2018
Location: South Bama
Karma: 1
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Senior Member |
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I already have the first back unit listed but this weekend I could have really used the front. So I'm thinking about getting one.
M Beam
75’ Avion
TBI EBL , 3.70 LSD and other stuff
Zuki Sidekick,
Dozier Al
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| Re: Best Jack Adapter [message #351935 is a reply to message #351931] |
Tue, 04 February 2020 20:08 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Sir: the #1 cast jack adapter will not work with Tom Pryor reaction arm anchor block.
The #2 welded one for rear will work on Tom Pryor reaction arm anchor block.
The #3 I have no experience with nor do I have any experience with Manny's reaction arm anchor block.
traveler1980 wrote on Tue, 04 February 2020 20:06Hi All,
I would like to buy a jack adapter for my coach. Jim K lists 3 on his website - two that lift only the back and one that can be used front and back. I'm thinking the one for front and back would be best, but wanted to make sure that was the consensus. Here are the options -
Back-only #1 https://www.gmcrvparts.com/product-p/rv101.htm
Back-only #2 https://www.gmcrvparts.com/product-p/ap40-1.htm
Front and Back https://www.gmcrvparts.com/product-p/ap40.htm
Thanks as always for your help!
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Best Jack Adapter [message #351937 is a reply to message #351935] |
Tue, 04 February 2020 21:44 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Chuck,
The Duel unit is designed to work well when a tire gois flat as the frame
at that point is too low to accept a standard Bottle Jack.
We acquired this fine design from a person that wanted to quit making them.
We also supply a two stage bottle jack, the Stubby Jack was discontinued .
On Tue, Feb 4, 2020 at 6:09 PM Charles Boyd via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Sir: the #1 cast jack adapter will not work with Tom Pryor reaction arm
> anchor block.
> The #2 welded one for rear will work on Tom Pryor reaction arm
> anchor block.
> The #3 I have no experience with nor do I have any experience with
> Manny's reaction arm anchor block.
>
>
>
>
>
>
> traveler1980 wrote on Tue, 04 February 2020 20:06
>> Hi All,
>>
>> I would like to buy a jack adapter for my coach. Jim K lists 3 on his
> website - two that lift only the back and one that can be used front and
>> back. I'm thinking the one for front and back would be best, but wanted
> to make sure that was the consensus. Here are the options -
>>
>> Back-only #1 https://www.gmcrvparts.com/product-p/rv101.htm
>> Back-only #2 https://www.gmcrvparts.com/product-p/ap40-1.htm
>> Front and Back https://www.gmcrvparts.com/product-p/ap40.htm
>>
>> Thanks as always for your help!
>
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
_______________________________________________
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Best Jack Adapter [message #351942 is a reply to message #351931] |
Wed, 05 February 2020 05:13 |
traveler1980
Messages: 24
Registered: September 2019
Location: Gettysburg, PA
Karma: 0
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Junior Member |
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Thanks All! I have the OEM brake setup in the back (drums), so no reaction arms to be concerned with, although that may be an upgrade I consider in the future. I'll probably go with the dual jack, but just wanted to see if anyone had used it or had recommendations for one or the other. I have a 2 stage bottle jack that the PO gave me and am hoping that will work fine with the adapter.
Jamie Sharp
South Central PA (Gettysburg area)
'76 Palm Beach, AKA "Grumble"
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| Re: Best Jack Adapter [message #351944 is a reply to message #351942] |
Wed, 05 February 2020 06:28 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Sir, I have 2 of the #2 welded jack adapters and 2 yellow Ford two stage bottle jacks that I use to raise the back of coaches to put on jack stands. It does clear all wheels off the ground. I also carry them when traveling. Our Crestmont does not have campground leveling valves and I use to level coach when parked. I used to use floor jacks to raise rears but required jacking on anchor bracket. I don't believe it was an issue but I am more comfortable with the hooks and bottle jacks.
Jim K. I have not held or tried the front hook style. Does it hook to frame just anywhere on either side or does it need to be in a specific place to raise front to change tire? Can it be used on the middle of the crossmember to jack up front of coach level to put on jack stands?
traveler1980 wrote on Wed, 05 February 2020 06:13Thanks All! I have the OEM brake setup in the back (drums), so no reaction arms to be concerned with, although that may be an upgrade I consider in the future. I'll probably go with the dual jack, but just wanted to see if anyone had used it or had recommendations for one or the other. I have a 2 stage bottle jack that the PO gave me and am hoping that will work fine with the adapter.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Best Jack Adapter [message #351946 is a reply to message #351944] |
Wed, 05 February 2020 08:15 |
traveler1980
Messages: 24
Registered: September 2019
Location: Gettysburg, PA
Karma: 0
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Junior Member |
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Thanks Chuck. I appreciate the info. Hadn't considered buying two adapters to lift the coach in the back. I was going to use a floor jack most of the time, but definitely something to think about.
Jamie Sharp
South Central PA (Gettysburg area)
'76 Palm Beach, AKA "Grumble"
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| Re: Best Jack Adapter [message #351975 is a reply to message #351948] |
Wed, 05 February 2020 20:34 |
traveler1980
Messages: 24
Registered: September 2019
Location: Gettysburg, PA
Karma: 0
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Junior Member |
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Thanks Bruce.
I understand that the bar is used to prevent the wheels from dropping too far and damaging he shocks. Is that always needed or could I just let the air out of the bags before I jack it up very high? Just got my coach late last summer and I haven't actually jacked it up yet, so trying to learn as much as possible before I break something (which is how I often learn anyway).
Jamie Sharp
South Central PA (Gettysburg area)
'76 Palm Beach, AKA "Grumble"
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| Re: Best Jack Adapter [message #351977 is a reply to message #351976] |
Wed, 05 February 2020 20:53 |
traveler1980
Messages: 24
Registered: September 2019
Location: Gettysburg, PA
Karma: 0
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Junior Member |
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Thanks Larry! Lots of climbing to do with the GMC learning curve. I appreciate all of the help and feedback.
Jamie Sharp
South Central PA (Gettysburg area)
'76 Palm Beach, AKA "Grumble"
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| Re: [GMCnet] Best Jack Adapter [message #351978 is a reply to message #351976] |
Wed, 05 February 2020 21:12 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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If you lower the pressure as you unweight the bag by lifting you will not
have any risk of damaging anything. That said I have lifted mine several
times without unloading the bags as I did not know that was a thing and
nothing got damaged. I believe it is POSSIBLE to damage the shocks or the
shock mounts by lifting the coach with air pressure in the bags but I think
it is not so much the norm. If you think about it a little there are times
under not super unusual driving conditions where one of the arms will swing
out freely and the only thing that stops it is the shock absorber. I think
the loads encountered by the shocks in these situations must be more severe
than a gradual loading such as when jacking. Many passenger cars have the
shocks as the limiting factor in suspension extension and these shocks are
also working against a spring which is trying to grow. I suspect old shocks
with worn mounts are the ones which fail or rigs which are lifted with huge
pressures in the bags.
Sully
Bellevue wa.
On Wed, Feb 5, 2020 at 6:45 PM Larry via Gmclist
wrote:
> traveler1980 wrote on Wed, 05 February 2020 20:34
>> Thanks Bruce.
>>
>> I understand that the bar is used to prevent the wheels from dropping
> too far and damaging he shocks. Is that always needed or could I just let
>> the air out of the bags before I jack it up very high? Just got my
> coach late last summer and I haven't actually jacked it up yet, so trying to
>> learn as much as possible before I break something (which is how I often
> learn anyway).
>
> Here is what I've used.
> http://www.gmcmhphotos.com/photos/g6509-blaze-orange-bogie-leaf-spring.html
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Unsubscribe or Change List Options:
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Best Jack Adapter [message #351979 is a reply to message #351976] |
Wed, 05 February 2020 21:16 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Chuck,
There is a round hole in the inner frame where the front joins the side
rail.
Plke the sharp end in and swing it to the outside.
You can go to our sight and get the instruction sheet
On Wed, Feb 5, 2020 at 6:45 PM Larry via Gmclist
wrote:
> traveler1980 wrote on Wed, 05 February 2020 20:34
>> Thanks Bruce.
>>
>> I understand that the bar is used to prevent the wheels from dropping
> too far and damaging he shocks. Is that always needed or could I just let
>> the air out of the bags before I jack it up very high? Just got my
> coach late last summer and I haven't actually jacked it up yet, so trying to
>> learn as much as possible before I break something (which is how I often
> learn anyway).
>
> Here is what I've used.
> http://www.gmcmhphotos.com/photos/g6509-blaze-orange-bogie-leaf-spring.html
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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