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Torsion bar bolt [message #195562]

Mon, 14 January 2013 20:09

skip2

Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...

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Senior Member

Does anyone know of an estimate of how much a turn or two on the torsion bar adjusting bolt is equal to in ride heigth?
Skip Hartline

74 Canyon Lands, FiTech, 3.7 FD LSD, Manny Tranny, Springfield Distributor, 2001 Chevy Tracker Ragtop Towd

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Re: Torsion bar bolt [message #195563 is a reply to message #195562]

Mon, 14 January 2013 20:22

rvanwin

Messages: 325
Registered: April 2007
Location: Battlefield, MO

Karma: 6

Senior Member

skip2 wrote on Mon, 14 January 2013 20:09

Does anyone know of an estimate of how much a turn or two on the torsion bar adjusting bolt is equal to in ride heigth?
Skip Hartline

I believe 6 full turns equal approximately1" ride height.

Randy & Margie
'77 Eleganza II '403'
Battlefield, MO

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Re: [GMCnet] Torsion bar bolt [message #195564 is a reply to message #195562]

Mon, 14 January 2013 20:30

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Skip,

Below you will find what Chuck Boyd posted awhile back, he's a clever fella! ;-)

HOWEVER, under NO circumstances screw the torsion bar adjusting bolts IN with the coach on the ground you WILL strip either the bolt
or the threads in the block. It has been noted here that people have turned them OUT successfully without damage.

IIRC if you look in the early Maintenance Manual it says it's OK to adjust the bolt if you raise the front end off the ground.

The later manuals changed the instructions and noted to use a torsion bar unloading tool like this:

http://www.appliedgmc.com/prod.itml/icOid/1116

OR

http://www.appliedgmc.com/prod.itml/icOid/924

If you want to make one here's one that Larry Weidner made:

http://www.gmcmhphotos.com/photos/g3805-front-suspension-adjusting-tool.html

Gene Dotson has noted that he has adjusted the ride height successfully on his GMC by jacking the front end off the ground a number
of times with no ill effects.

Regards,
Rob M.

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Charles Boyd
Sent: Thursday, June 10, 2010 11:27 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Ride Height Adjustment

6 turns = 1 inch
--
C. Boyd
76 Crestmont by Midas
East Tennessee

-----Original Message-----
From: Skip Hartline

Does anyone know of an estimate of how much a turn or two on the torsion bar adjusting bolt is equal to in ride height?

Skip

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] Torsion bar bolt [message #195568 is a reply to message #195564]

Mon, 14 January 2013 21:36

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

>
> The later manuals changed the instructions and noted to use a torsion bar
> unloading tool like this:
>
> http://www.appliedgmc.com/prod.itml/icOid/1116
>
> OR
>
> http://www.appliedgmc.com/prod.itml/icOid/924
>
> If you want to make one here's one that Larry Weidner made:
>
>
> http://www.gmcmhphotos.com/photos/g3805-front-suspension-adjusting-tool.html
>
> and this
http://gmcmotorhomeinfo.20m.com/figs/torson/TorsionBarTension.htm

gene
--
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] Torsion bar bolt [message #195570 is a reply to message #195568]

Mon, 14 January 2013 22:15

Jerry Wheeler

Messages: 246
Registered: January 2013

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Senior Member

When I was setting the ride height in my daughter's RV after Manny had
installed his front end system, I found that 8 turns equaled an inch, even
tho several of the folks who were there when I was doing the adjustments
said 6 turns per inch. JWID.
JR Wheeler 78 Royale NC/OR

On Mon, Jan 14, 2013 at 10:36 PM, gene Fisher <mr.erfisher@gmail.com> wrote:

> >
> > The later manuals changed the instructions and noted to use a torsion bar
> > unloading tool like this:
> >
> > http://www.appliedgmc.com/prod.itml/icOid/1116
> >
> > OR
> >
> > http://www.appliedgmc.com/prod.itml/icOid/924
> >
> > If you want to make one here's one that Larry Weidner made:
> >
> >
> >
> http://www.gmcmhphotos.com/photos/g3805-front-suspension-adjusting-tool.html
> >
> > and this
> http://gmcmotorhomeinfo.20m.com/figs/torson/TorsionBarTension.htm
>
> gene
> --
> 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
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>
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Re: [GMCnet] Torsion bar bolt [message #195576 is a reply to message #195570]

Tue, 15 January 2013 03:45

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

JR,

That makes sense since the 1 Ton moves the wheels outwards about 2 inches.

I reckon if you have spacers on the OEM bearings it should be 8 also.

Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Jerry Wheeler

When I was setting the ride height in my daughter's RV after Manny had
installed his front end system, I found that 8 turns equaled an inch, even
tho several of the folks who were there when I was doing the adjustments
said 6 turns per inch. JWID.
JR Wheeler 78 Royale NC/OR

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] Torsion bar bolt [message #195583 is a reply to message #195576]

Tue, 15 January 2013 05:52

Steven Ferguson

Messages: 3447
Registered: May 2006

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Senior Member

I would have to think that weight has to be figured into this also.

On Tue, Jan 15, 2013 at 2:48 AM, Rob Mueller <robmueller@iinet.net.au>wrote:

> JR,
>
> That makes sense since the 1 Ton moves the wheels outwards about 2 inches.
>
> I reckon if you have spacers on the OEM bearings it should be 8 also.
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org [mailto:
> gmclist-bounces@temp.gmcnet.org] On Behalf Of Jerry Wheeler
>
> When I was setting the ride height in my daughter's RV after Manny had
> installed his front end system, I found that 8 turns equaled an inch, even
> tho several of the folks who were there when I was doing the adjustments
> said 6 turns per inch. JWID.
> JR Wheeler 78 Royale NC/OR
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Take care,
Steve
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Re: [GMCnet] Torsion bar bolt [message #195591 is a reply to message #195583]

Tue, 15 January 2013 08:34

emerystora

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Registered: January 2004

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Senior Member

On Jan 15, 2013, at 6:52 AM, Steven Ferguson <botiemad11@gmail.com> wrote:

> I would have to think that weight has to be figured into this also.
>
>
I agree. Not only weight but also the condition of the torsion bars. One can't do it by just counting the turns of the bolt. Turn and measure and turn and measure works fine.

Emery Stora
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