Home » Public Forums » GMCnet » [GMCnet] Jacking up the coach at the Bogies
| [GMCnet] Jacking up the coach at the Bogies [message #345264] |
Sun, 14 July 2019 11:59  |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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I’ve always let the air pressure out of the bags before jacking the coach up at the bogies.
A number of folks I know don’t do this.
Am I adding an unnecessary step?
What do you do?
Thanks.
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Manny Transmission
“The Aluminum and Fiberglass Mistress"
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| Re: [GMCnet] Jacking up the coach at the Bogies [message #345276 is a reply to message #345264] |
Sun, 14 July 2019 13:55  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Dolph,
Your procedure helps raise the tires easier as the shocks will influence
the position.
One can also slide in steel plates through the boggie housing ad support
the arms and require less raising of the coach. Be sure to remove the plate.
I make sure in our shop by tying on bright colored ribbon .
on them.
On Sun, Jul 14, 2019 at 10:00 AM Dolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I’ve always let the air pressure out of the bags before jacking the coach
> up at the bogies.
>
> A number of folks I know don’t do this.
>
> Am I adding an unnecessary step?
>
> What do you do?
>
> Thanks.
>
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress"
>
> _______________________________________________
> 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.appliedgmc.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: [GMCnet] Jacking up the coach at the Bogies [message #345281 is a reply to message #345264] |
Sun, 14 July 2019 14:27 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I've a plate cut from a leaf spring which fits under the bogies, the arch is just right for easy in and out. I set a bottle jak under the center of the bogie mount and take a strain, then insert the plate and let the air out of the bag and jack it up, My jack bottom is narrow enough to put a piece of cribbing 4x4 on each side of it and still have the bogie mount take the load. Cribbing it properly does surround the jack, so I have 2 to raise the rear. This does, however, leave a jack on each side inside the cribbing as a sort of safety catch should something go wrong. I won't gop under one unloess it's cribbed with sturdy lumber.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Jacking up the coach at the Bogies [message #345286 is a reply to message #345264] |
Sun, 14 July 2019 15:16 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Dolph,
Depends: If I just want to get clearance under the frame, I just jack 'er
up. But if I want to get a tire off of the ground, I take the weight with
the jack, install my 3/8"x3"x12" arm lifting bar beneath the suspension
arms & on top of the bottom of the bogie, and let the air out of the bags.
The tires then lift off the ground right away. Letting the air out is
IMPORTANT: I've got one of those 3/8" thick steel bars with a nice curve
in it -- one of our regulars here jacked up with it installed without
dumping the air. :-( I've also got a bogie with the bottom broken where
one of our deceased members did something similar on his coach. Lots of
force in those arms (as a WAG, they can exert about 1800# weight X Arm
length / Distance pin to contact = 1800# X 15 / 3 = 9000 lbf on the bottom
of the bogie).
Ken H.
On Sun, Jul 14, 2019 at 1:00 PM Dolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I’ve always let the air pressure out of the bags before jacking the coach
> up at the bogies.
>
> A number of folks I know don’t do this.
>
> Am I adding an unnecessary step?
>
> What do you do?
>
> Thanks.
>
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Jacking up the coach [message #361015 is a reply to message #345264] |
Sun, 20 December 2020 12:25 |
Stu Rasmussen
Messages: 130
Registered: January 2019
Location: Silverton, OR
Karma: 0
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Senior Member |
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When I got the new tires for the Birchaven at a Firestone store I
specifically asked about supervising the lifting (after explaining the
pitfalls of doing it wrong). They said "OK, fine." Line crew were
parroting the company line about staying out of the service bays briefly
but then, after giving the spiel they relented and all was good.
and BTW, They couldn't get to 250 ft-lb of torque, their wrenches only
went to 200 !
JWID
Stu
I still wish I knew why she jettisoned her hubcaps within 300 feet :0
On 2020-12-20 10:16, Todd Sullivan via Gmclist wrote:
> I would not have a huge chain type place work on my GMC unless I was in
> a
> pinch. If you are I would at least pre spray the studs with silicone
> spray
> or wd40 to prevent gaul seizure when the schwabbie spins the nuts off
> at
> 150 psi.
>
> Sully
> Bellevue wa
>
> On Sun, Dec 20, 2020 at 7:37 AM Larry via Gmclist
>
> wrote:
>
>> This fall I bought two new tires on my 6 yr rotation schedule. I also
>> put
>> best of the two replaced tires on the spare, had all seven balanced
>> and
>> rotated everything in keeping with my 6yr plan. Before I made the
>> appointment to do this work, I talked to the manager and asked that I
>> be
>> allowed to
>> assist the employee with the lifting of the coach. At first reluctant
>> on
>> his part, changed his mind when I explained that lifting the front
>> wrong ran
>> the risk of cracking one of the windshields, and lifting the rear
>> wrong
>> ran the risk of breaking the shock mounts off. That opened his eyes
>> and
>> allowed me into the shop. The tire jockey was at first passive
>> aggressive
>> to my suggestions, as he was about to lift the frame behind the left
>> front
>> wheel. But after explaining the risks involved, came around and
>> actually
>> allowed me to help him do the work. Work with your vendor. When you
>> explain
>> the risks, I've found most don't want to damage something they have
>> never
>> worked on or even seen before. Just the way I handled it.
>> --
>> 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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Stu Rasmussen W7QJ
Silverton, OR
'77 Birchaven
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| Re: [GMCnet] Jacking up the coach [message #361018 is a reply to message #361015] |
Sun, 20 December 2020 12:44 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
|
Senior Member |
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Sir, The reason she jettisoned her hubcaps (in my opinion and experience) is because they used fat weights that prevented the hubcaps from seating on the rims completely.
Stu Rasmussen wrote on Sun, 20 December 2020 13:25
When I got the new tires for the Birchaven at a Firestone store I
specifically asked about supervising the lifting (after explaining the
pitfalls of doing it wrong). They said "OK, fine." Line crew were
parroting the company line about staying out of the service bays briefly
but then, after giving the spiel they relented and all was good.
and BTW, They couldn't get to 250 ft-lb of torque, their wrenches only
went to 200 !
JWID
Stu
I still wish I knew why she jettisoned her hubcaps within 300 feet :0
On 2020-12-20 10:16, Todd Sullivan via Gmclist wrote:
> I would not have a huge chain type place work on my GMC unless I was in
> a
> pinch. If you are I would at least pre spray the studs with silicone
> spray
> or wd40 to prevent gaul seizure when the schwabbie spins the nuts off
> at
> 150 psi.
>
> Sully
> Bellevue wa
>
> On Sun, Dec 20, 2020 at 7:37 AM Larry via Gmclist
>
> wrote:
>
>> This fall I bought two new tires on my 6 yr rotation schedule. I also
>> put
>> best of the two replaced tires on the spare, had all seven balanced
>> and
>> rotated everything in keeping with my 6yr plan. Before I made the
>> appointment to do this work, I talked to the manager and asked that I
>> be
>> allowed to
>> assist the employee with the lifting of the coach. At first reluctant
>> on
>> his part, changed his mind when I explained that lifting the front
>> wrong ran
>> the risk of cracking one of the windshields, and lifting the rear
>> wrong
>> ran the risk of breaking the shock mounts off. That opened his eyes
>> and
>> allowed me into the shop. The tire jockey was at first passive
>> aggressive
>> to my suggestions, as he was about to lift the frame behind the left
>> front
>> wheel. But after explaining the risks involved, came around and
>> actually
>> allowed me to help him do the work. Work with your vendor. When you
>> explain
>> the risks, I've found most don't want to damage something they have
>> never
>> worked on or even seen before. Just the way I handled it.
>> --
>> 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
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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C. Boyd
76 Crestmont
East Tennessee
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