| [GMCnet] Front Ride Highth [message #250640] |
Mon, 26 May 2014 08:14  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Has anyone noted that if you turn the ride hight bolt one turn. What that equals in final actual ride height gain. I realize that it wouldn't be the same over the entire ark. But when you get near the correct height. In that short range. I would think that there should be a measurable equation. The problem is all the variables involved. So I'm looking for ranges. Not absolute numbers.ThanksBob Dunahugh Member GMCMI78 Royale
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| Re: [GMCnet] Front Ride Highth [message #250643 is a reply to message #250640] |
Mon, 26 May 2014 08:51  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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It is not linear. Because the resistance to twist increases with the
greater attempt to twist it, there cannot be any relationship between a
threaded bolt and nut and a piece of torsion bar steel. To put it another
way, moving the pork chop in an arc with a bolt and nut does not raise the
coach at the same rate. Stiction in bushings and shocks, weight on the
control arm assembly, temperature, and many other factors influence how far
the front end will lift. And remember this, as it is very important. THE
COACH MUST BE DRIVEN SEVERAL MILES AND RETURNED TO THE PLACE WHERE THE
ADJUSTMENT WAS MADE BEFORE YOU CAN DETERMINE EXACTLY THE DIFFERENCES
BETWEEN BEFORE AND AFTER THE NEW ADJUSTMENT. That is my story, and I'm
sticking to it. Your experience might vary a bit. (grin)
Jim Hupy
Salem, Or (presently in Spokane, Wa)
78 gmc Royale 403
On Mon, May 26, 2014 at 6:14 AM, Bob Dunahugh wrote:
> Has anyone noted that if you turn the ride hight bolt one turn. What that
> equals in final actual ride height gain. I realize that it wouldn't be the
> same over the entire ark. But when you get near the correct height. In that
> short range. I would think that there should be a measurable equation. The
> problem is all the variables involved. So I'm looking for ranges. Not
> absolute numbers.ThanksBob Dunahugh Member GMCMI78 Royale
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Front Ride Highth [message #250646 is a reply to message #250643] |
Mon, 26 May 2014 09:57 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Bob,
6 turns of the adjustment screw per inch is "standard" -- it's just a WAG,
but is better than nothing to get you close. Be sure to drive and recheck,
drive and recheck until everything stabilizes.
However, sometimes even a blind hog finds an acorn: At Bean Station "we"
(meaning I pointed a lot but didn't get very greasy) installed two 1-Ton's
and moved the near-new front suspension from one of those targets to
another GMC. With only a little bias toward the high side during assembly,
every one of those 3 coaches survived its test drive with no change to the
ride heights!
And, I'm happy to report that the owners were so happy with the handling
that not one of them required any alignment adjustment after being set up
with my jigs, poly sheets under the wheels, and laser level. One of them I
thought pulled a bit to the right, but the owner thought it pulled a little
to the left, so we agreed that it must be "right on". :-)
http://www.gmcmhphotos.com/photos/g5634-wheel-alignment-jigs.html
Ken H.
On Mon, May 26, 2014 at 6:14 AM, Bob Dunahugh wrote:
>
>> Has anyone noted that if you turn the ride hight bolt one turn. Whatthat
>> equals in final actual ride height gain. I realize that it wouldn't be
> the
>> same over the entire ark. But when you get near the correct height. In
> that
>> short range. I would think that there should be a measurable equation.
> The
>> problem is all the variables involved. So I'm looking for ranges. Not
>> absolute numbers.ThanksBob Dunahugh Member GMCMI78 Royale
>>
>
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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] Front Ride Highth [message #250663 is a reply to message #250646] |
Mon, 26 May 2014 14:40 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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The Pig front height did not change from initial setting after rebuilding the whole front suspension and removing the front frame clip either.
Todd Sullivan
Sully
77 royale
Seattle
> On May 26, 2014, at 7:57 AM, Ken Henderson wrote:
>
> Bob,
>
> 6 turns of the adjustment screw per inch is "standard" -- it's just a WAG,
> but is better than nothing to get you close. Be sure to drive and recheck,
> drive and recheck until everything stabilizes.
>
> However, sometimes even a blind hog finds an acorn: At Bean Station "we"
> (meaning I pointed a lot but didn't get very greasy) installed two 1-Ton's
> and moved the near-new front suspension from one of those targets to
> another GMC. With only a little bias toward the high side during assembly,
> every one of those 3 coaches survived its test drive with no change to the
> ride heights!
>
> And, I'm happy to report that the owners were so happy with the handling
> that not one of them required any alignment adjustment after being set up
> with my jigs, poly sheets under the wheels, and laser level. One of them I
> thought pulled a bit to the right, but the owner thought it pulled a little
> to the left, so we agreed that it must be "right on". :-)
>
> http://www.gmcmhphotos.com/photos/g5634-wheel-alignment-jigs.html
>
> Ken H.
>
>> On Mon, May 26, 2014 at 6:14 AM, Bob Dunahugh wrote:
>>
>>> Has anyone noted that if you turn the ride hight bolt one turn. Whatthat
>>> equals in final actual ride height gain. I realize that it wouldn't be
>> the
>>> same over the entire ark. But when you get near the correct height. In
>> that
>>> short range. I would think that there should be a measurable equation.
>> The
>>> problem is all the variables involved. So I'm looking for ranges. Not
>>> absolute numbers.ThanksBob Dunahugh Member GMCMI78 Royale
>>>
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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] Front Ride Highth [message #250684 is a reply to message #250663] |
Mon, 26 May 2014 22:13 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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sgltrac wrote on Mon, 26 May 2014 14:40The Pig front height did not change from initial setting after rebuilding the whole front suspension and removing the front frame clip either.
Todd Sullivan
That was my experience also. I was shocked. But I was very careful on counting the turns on the bolt when I took it apart and set it the same when I put it back together.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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