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| [GMCnet] Re: sreering [message #367462 is a reply to message #367461] |
Tue, 02 November 2021 11:32   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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You absolutely need to set the rear ride height correctly first of all.
Then, immobilize the bogie boxes at that height and turn off your automatic
height adjusters, no matter which ones your coach has.
Then, and ONLY THEN, can you proceed with the front torsion bar
adjustments. Weight and balance between sides is quite critical. Try to
adjust your side to side weights .as close to the same as you can. With
some coaches, this is hard to do, but it is important.
Each time you lift the front end and adjust the torsion bars, the
coach should be driven several miles to settle it down. If you do not do
this, don't waste your time doing any alignment adjustments.
They won't be accurate.. I have done dozens of these coaches and learned
these lessons the hard way.
If you do not know anything else, remember this point. "THE BACK OF
THE COACH CAN AND DOES STEER THE COACH" Check the front bogies for any slop
or bending. If you find anything wrong, fix it first.
Jim Hupy
Salem, Oregon
On Tue, Nov 2, 2021, 9:06 AM Keith V wrote:
> Jon,
> With Microlevel the height should be easy. Worst case use the remote to
> tweek the rear height if you mess with the front height.
> ________________________________
> From: Brian Waddell
> Sent: Monday, November 1, 2021 11:26 PM
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Re: sreering
>
> Yes that is why I am told to come back the next day after 50 miles, and
> recheck it...that is what this shop tells the semi-tractor owners on air
> bags in the rear with levelling valves exactly like ours and have a
> recommended ride height to maintain , as the ride height affects steering
> geometry as you well know
> Brian 77 ele 455
> sper,ing mb canada
> ________________________________
> From: Jon Roche
> Sent: November 1, 2021 2:46 PM
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Re: sreering
>
> I disagree with your statement "the gmc front end is nothing new to
> reputable wheel alignment places that do heavier vehicles like ours and
> trucks."
>
>
> they do not always understand that when they jack up the coach front end,
> and set it back down, it needs to be driven, bounced, ect and re-checked
> because the suspension needs to "settle in". when you set the weight
> down on a coach, and check alinement. Then pull it off the lift, and
> back
> on, the specs are different before and after you lift up the weight.
>
> have seen 6+ coaches that were aligned at those shops, that were never
> right.
>
> also fwiw, our local Dodge Dealer can't align a dodge caravan correctly
> either. So the number of skilled shops/mechanics out there are getting
> less and less.
>
>
> Brian Waddell wrote on Sun, 31 October 2021 11:59
>> Most shops that do wheel alignments do not pay attention to the wheel
> wheels,,,they do not put the rear wheels on turntables to determine if the
>> the rear has play causing caster camber or toe...an example would be a
> bent frame.
>> However, the gmc front end is nothing new to reputable wheel alignment
> places that do heavier vehicles like ours and trucks.
>> One more however..I have attempted to check wheel alignment myself using
> Work's methods and henderson's methods and would say that the shoips (x2
>> )of what they said it was.....was supported by my measurements of caster
> 3.5 +...camber 0 and toe pretty much 0...go0d enough... and those on here
>> who tell of determining if the rear is out of whack or bent ..or play in
> stub axles....Thanks
>> Brian
>> 77 ele 455
>> sperling mb canada
>> ________________________________
>> From: John R.Lebetski
>> Sent: October 31, 2021 7:32 AM
>> To: gmclist@list.gmcnet.org
>> Subject: [GMCnet] Re: sreering
>>
>> Semi shops work on trucks with solid front axles and leaf springs. 99%
> of the time all they adjust is the toe. You need someone who understands
>> GM A
>> arm front ends and how caster and camber are adjusted and how the
> adjustments interact. I bought the Jerry Work home alignment kit and did
> mine
>> myself.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
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>
> --
> Jon Roche
> 75 palm beach
> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
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