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[GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61318] Fri, 23 October 2009 13:55 Go to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
We completed the wheel alignment on my coach at 8:00 p.m. last night. I
think I cranked the torsion bar adjusters 6-7 times on one side, until I
got the ride height even.
I took it out of the shop this morning and backed it up over several
full measure 4 inch by 6 inch short chunks of timber. I ran the rear
wheels back and forth over these blocks while having the Harrison 4-bag
system inflated to 120psi. After all the horror stories, I wanted to
see if I could bend it. This was not a wise move as one of the blocks
managed to flip around end on and jam itself between the two wheels on
the passenger side. Both wheels skidded as the 4 x 6 was at a 45*
angle, hooked in the tread of the tires and tight against the bottom of
the bogie box. I had to use my two bottle jacks on the frame, release
the air from the bags, let the air out of the tires and then split
pieces off the block to get it out. The shop owner was most amused at
this performance in the rain. He was even more amused when I stripped
off my filthy wet clothes and drove away in my shorts and "T" shirt. I
didn't want to get my coach dirty. The Harrison 4-Bay suspension came
out unscathed.
Gordon "Resting peacefully, after a hot shower".
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61319 is a reply to message #61318] Fri, 23 October 2009 14:09 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
Gezz Gord, You have sooooo much fun out there!

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61330 is a reply to message #61318] Fri, 23 October 2009 16:05 Go to previous messageGo to next message
Gary Casey is currently offline  Gary Casey   United States
Messages: 448
Registered: September 2009
Karma: 0
Senior Member
I wish I were there to watch :-).  But here's the question:  How do you know how to adjust the torsion bars without measuring the weight on each wheel?  Put the same pressure in each air bag and then level the coach?  But then what if there is a side-to-side unbalance?  I know my left side bag requires more pressure than the right side - I assume because of the weight of the generator.  Then there is the effect of the anti-roll bar, if that isn't straight.  I'm going to need to do this, but I don't know how to proceed.
Gary

We completed the wheel alignment on my coach at 8:00 p.m. last night.  I
think I cranked the torsion bar adjusters 6-7 times on one side, until I
got the ride height even.
Gordon "Resting peacefully, after a hot shower".
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Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61331 is a reply to message #61318] Fri, 23 October 2009 16:12 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Tin Gerbil wrote on Fri, 23 October 2009 14:55

We completed the wheel alignment on my coach at 8:00 p.m. last night. I think I cranked the torsion bar adjusters 6-7 times on one side, until I got the ride height even.
I took it out of the shop this morning and backed it up over several full measure 4 inch by 6 inch short chunks of timber. I ran the rear wheels back and forth over these blocks while having the Harrison 4-bag system inflated to 120psi. After all the horror stories, I wanted to see if I could bend it. This was not a wise move as one of the blocks managed to flip around end on and jam itself between the two wheels on the passenger side. Both wheels skidded as the 4 x 6 was at a 45* angle, hooked in the tread of the tires and tight against the bottom of
the bogie box. I had to use my two bottle jacks on the frame, release the air from the bags, let the air out of the tires and then split pieces off the block to get it out. The shop owner was most amused at this performance in the rain. He was even more amused when I stripped off my filthy wet clothes and drove away in my shorts and "T" shirt. I didn't want to get my coach dirty. The Harrison 4-Bay suspension came out unscathed.
Gordon "Resting peacefully, after a hot shower".


I do hope you recorded all that so we can all learn from it. Some may have a laugh, but that is just because they didn't think of it first.
Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61339 is a reply to message #61318] Fri, 23 October 2009 16:32 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gordon,

Remind me:

1) what year is your GMC?
2) did you put offset bushings both "legs" of the upper control arms?
3) how much caster were you able to get?

Regards,
Rob Mueller
Sydney, Australia
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 Gordon
Sent: Saturday, 24 October 2009 5:55 AM
To: GMCTEMP
Subject: [GMCnet] Wheel Alignment, Suspension and Entertainment.

We completed the wheel alignment on my coach at 8:00 p.m. last night. I
think I cranked the torsion bar adjusters 6-7 times on one side, until I
got the ride height even.
I took it out of the shop this morning and backed it up over several
full measure 4 inch by 6 inch short chunks of timber. I ran the rear
wheels back and forth over these blocks while having the Harrison 4-bag
system inflated to 120psi. After all the horror stories, I wanted to
see if I could bend it. This was not a wise move as one of the blocks
managed to flip around end on and jam itself between the two wheels on
the passenger side. Both wheels skidded as the 4 x 6 was at a 45*
angle, hooked in the tread of the tires and tight against the bottom of
the bogie box. I had to use my two bottle jacks on the frame, release
the air from the bags, let the air out of the tires and then split
pieces off the block to get it out. The shop owner was most amused at
this performance in the rain. He was even more amused when I stripped
off my filthy wet clothes and drove away in my shorts and "T" shirt. I
didn't want to get my coach dirty. The Harrison 4-Bay suspension came
out unscathed.
Gordon "Resting peacefully, after a hot shower".
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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
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61341 is a reply to message #61318] Fri, 23 October 2009 16:36 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
Gordon, I do not know how it happened but I have seen the Harrison bags with a badly bent bracket. Not saying anything bad about them but I do like that heavier bracket myself.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61351 is a reply to message #61339] Fri, 23 October 2009 17:32 Go to previous messageGo to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
1. 1973
2. Both offset bushings on both legs.
3. 2.25 L and 2.75 R. Caster was the maximum we could get with the ride
height set to 13.25". If I lowered the ride height, which would change
the camber, I could then get more caster, with zero camber.
As usual, I did not follow directions. The alignment guy took a lot of
time to convinced me that the caster we ended up with would make the
coach go straight on a crowned road, hands off. He also told me that if
I was running on flat roads, in the desert, without crown, he would set
the caster even. It steers very well and does go straight, hands off on
a crowned road. My only problem is with my True Tracks which appear to
be binding badly. They make a heck of a noise on any uneven surface. I
will have to fix this problem or junk them. Maybe they wear in? Maybe
I need more than 0.010 clearance between the roller and the track? They
make the same binding noise on both sides.
Gordon

Rob Mueller wrote:
> Gordon,
>
> Remind me:
>
> 1) what year is your GMC?
> 2) did you put offset bushings both "legs" of the upper control arms?
> 3) how much caster were you able to get?
>
> Regards,
> Rob Mueller
> Sydney, Australia
> 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 Gordon
> Sent: Saturday, 24 October 2009 5:55 AM
> To: GMCTEMP
> Subject: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>
> We completed the wheel alignment on my coach at 8:00 p.m. last night. I
> think I cranked the torsion bar adjusters 6-7 times on one side, until I
> got the ride height even.
> I took it out of the shop this morning and backed it up over several
> full measure 4 inch by 6 inch short chunks of timber. I ran the rear
> wheels back and forth over these blocks while having the Harrison 4-bag
> system inflated to 120psi. After all the horror stories, I wanted to
> see if I could bend it. This was not a wise move as one of the blocks
> managed to flip around end on and jam itself between the two wheels on
> the passenger side. Both wheels skidded as the 4 x 6 was at a 45*
> angle, hooked in the tread of the tires and tight against the bottom of
> the bogie box. I had to use my two bottle jacks on the frame, release
> the air from the bags, let the air out of the tires and then split
> pieces off the block to get it out. The shop owner was most amused at
> this performance in the rain. He was even more amused when I stripped
> off my filthy wet clothes and drove away in my shorts and "T" shirt. I
> didn't want to get my coach dirty. The Harrison 4-Bay suspension came
> out unscathed.
> Gordon "Resting peacefully, after a hot shower".
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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> List Information and Subscription Options:
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61352 is a reply to message #61341] Fri, 23 October 2009 17:43 Go to previous messageGo to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
Dan;
I accept the fact that some of them have bent. I can only assume their
coaches are much heavier than mine and they blew a tire plus went off
the edge of the pavement or hit a very deep hole. I checked the
position of the uprights, before and after running over the blocks and
they are in the same place.
I was very surprised how little jolt I got with 120psi in the 4 bags. I
have 75psi in the center tires and 65psi in the rears. It was a long
day, but the results are well worth it.
Are you running True Tracks?
Gordon

Dan Gregg wrote:
>
> Gordon, I do not know how it happened but I have seen the Harrison
> bags with a badly bent bracket. Not saying anything bad about them
> but I do like that heavier bracket myself. Dan
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61353 is a reply to message #61351] Fri, 23 October 2009 17:52 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gordon,

That's pretty good! The reason I asked is Double Trouble while being a 1975
Avion the chassis was built at GMC in November of 1974 according to Dave
Greenberg. It only has offset bushings in the back legs. The best caster Tom
Hampton could get was 1.9 Left & Right. I can't remember what he set the
front ride height at but he did set the rear higher than OEM spec which
would reduce the caster possible also. I am happy with the way it handles
but maybe some day I'll pop the upper control arms off and stick offsets in
the front legs also to see how much more caster I can get.

Thanks,
Rob Mueller
Sydney, Australia
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 Gordon
Sent: Saturday, 24 October 2009 9:32 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.

1. 1973
2. Both offset bushings on both legs.
3. 2.25 L and 2.75 R. Caster was the maximum we could get with the ride
height set to 13.25". If I lowered the ride height, which would change
the camber, I could then get more caster, with zero camber.
As usual, I did not follow directions. The alignment guy took a lot of
time to convinced me that the caster we ended up with would make the
coach go straight on a crowned road, hands off. He also told me that if
I was running on flat roads, in the desert, without crown, he would set
the caster even. It steers very well and does go straight, hands off on
a crowned road. My only problem is with my True Tracks which appear to
be binding badly. They make a heck of a noise on any uneven surface. I
will have to fix this problem or junk them. Maybe they wear in? Maybe
I need more than 0.010 clearance between the roller and the track? They
make the same binding noise on both sides.
Gordon


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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
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61356 is a reply to message #61353] Fri, 23 October 2009 17:57 Go to previous messageGo to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
Rob;
What ride height did you use to the center of the rear fender well?
Thanks;
Gordon

Rob Mueller wrote:
> Gordon,
>
> That's pretty good! The reason I asked is Double Trouble while being a 1975
> Avion the chassis was built at GMC in November of 1974 according to Dave
> Greenberg. It only has offset bushings in the back legs. The best caster Tom
> Hampton could get was 1.9 Left & Right. I can't remember what he set the
> front ride height at but he did set the rear higher than OEM spec which
> would reduce the caster possible also. I am happy with the way it handles
> but maybe some day I'll pop the upper control arms off and stick offsets in
> the front legs also to see how much more caster I can get.
>
> Thanks,
> Rob Mueller
> Sydney, Australia
> 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 Gordon
> Sent: Saturday, 24 October 2009 9:32 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>
> 1. 1973
> 2. Both offset bushings on both legs.
> 3. 2.25 L and 2.75 R. Caster was the maximum we could get with the ride
> height set to 13.25". If I lowered the ride height, which would change
> the camber, I could then get more caster, with zero camber.
> As usual, I did not follow directions. The alignment guy took a lot of
> time to convinced me that the caster we ended up with would make the
> coach go straight on a crowned road, hands off. He also told me that if
> I was running on flat roads, in the desert, without crown, he would set
> the caster even. It steers very well and does go straight, hands off on
> a crowned road. My only problem is with my True Tracks which appear to
> be binding badly. They make a heck of a noise on any uneven surface. I
> will have to fix this problem or junk them. Maybe they wear in? Maybe
> I need more than 0.010 clearance between the roller and the track? They
> make the same binding noise on both sides.
> Gordon
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61357 is a reply to message #61339] Fri, 23 October 2009 18:00 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma: 1
Senior Member
Gordon,

I once threatened to bring my lawn chair and sit under a tree to learn
from Rick. Do you have a tree I can use?

Ken H.
> -----Original Message-----
> ...one of the blocks
> managed to flip around end on and jam itself between the two wheels on
> the passenger side. Both wheels skidded as the 4 x 6 was at a 45*
> angle, hooked in the tread of the tires and tight against the bottom of
> the bogie box. I had to use my two bottle jacks on the frame, release
> the air from the bags, let the air out of the tires and then split
> pieces off the block to get it out. The shop owner was most amused at
> this performance in the rain. He was even more amused when I stripped
> off my filthy wet clothes and drove away in my shorts and "T" shirt. I
> didn't want to get my coach dirty. The Harrison 4-Bay suspension came
> out unscathed.
> Gordon "Resting peacefully, after a hot shower".
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Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61359 is a reply to message #61341] Fri, 23 October 2009 18:08 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Dan,

IIRC the Harrison system bends when you try to drive the coach with one flat
tire which is no problem on the Q-bagger.

Here's some photos of a bent bracket.

http://www.gmcmhphotos.com/photos/showphoto.php?photo=19032

Here's the fixed view:

http://www.gmcmhphotos.com/photos/showphoto.php?photo=19033

If you look closely at the fixed view you will see the only thing keeping
the vertical bag supports apart is a small rod in the center. The Blue
Streak's PO installed this system and to prevent the bending I will weld
four pieces of steel 1/4" thick and 1" long in between the two support
plates at 6:00 / 9:00 / 12:00 / 3:00. I reckon that will take car of that
problem.

Rob Mueller
Sydney, Australia
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 Dan Gregg
Sent: Saturday, 24 October 2009 8:37 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.

Gordon, I do not know how it happened but I have seen the Harrison bags with
a badly bent bracket. Not saying anything bad about them but I do like that
heavier bracket myself.
Dan
--
Dan & Teri Gregg

danandteri.blogspot.com



///Halon Automatic Fire Extinguishers
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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
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61360 is a reply to message #61352] Fri, 23 October 2009 18:11 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
Yes Gordon, I do have True Tracs on the back of our coach. I am running 65 lbs of air in all 4 rear tires and 70 in front 2. I have the full set but some are just running half a set. Do you need me to look at something for you?
I wont say whose 4 bags I saw bent but the coach had no interior so I figure it was pretty light weight. Not a clue how it happened. Best wishes on your's. Sounds like you have them on right so I know you will feel a big improvement over the single bags. I could not believe the difference in handling when we did the Quadrabags. What are you seeing as to how low and how high you can raise them as compared to the single bag?
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61361 is a reply to message #61356] Fri, 23 October 2009 18:11 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gordon,

Tom set the ride height to "his spec" using the slots in the frame and it
translated to 33 inches at the center of the wheel well. The coach sits
slightly down at the rear but it's almost level.

I do have new THICK rubber blocks from Bert & Faye Curtis between the frame
and body.

Regards,
Rob Mueller
Sydney, Australia
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 Gordon
Sent: Saturday, 24 October 2009 9:57 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.

Rob;
What ride height did you use to the center of the rear fender well?
Thanks;
Gordon

Rob Mueller wrote:
> Gordon,
>
> That's pretty good! The reason I asked is Double Trouble while being a
1975
> Avion the chassis was built at GMC in November of 1974 according to Dave
> Greenberg. It only has offset bushings in the back legs. The best caster
Tom
> Hampton could get was 1.9 Left & Right. I can't remember what he set the
> front ride height at but he did set the rear higher than OEM spec which
> would reduce the caster possible also. I am happy with the way it handles
> but maybe some day I'll pop the upper control arms off and stick offsets
in
> the front legs also to see how much more caster I can get.
>
> Thanks,
> Rob Mueller
> Sydney, Australia
> 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 Gordon
> Sent: Saturday, 24 October 2009 9:32 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>
> 1. 1973
> 2. Both offset bushings on both legs.
> 3. 2.25 L and 2.75 R. Caster was the maximum we could get with the ride
> height set to 13.25". If I lowered the ride height, which would change
> the camber, I could then get more caster, with zero camber.
> As usual, I did not follow directions. The alignment guy took a lot of
> time to convinced me that the caster we ended up with would make the
> coach go straight on a crowned road, hands off. He also told me that if
> I was running on flat roads, in the desert, without crown, he would set
> the caster even. It steers very well and does go straight, hands off on
> a crowned road. My only problem is with my True Tracks which appear to
> be binding badly. They make a heck of a noise on any uneven surface. I
> will have to fix this problem or junk them. Maybe they wear in? Maybe
> I need more than 0.010 clearance between the roller and the track? They
> make the same binding noise on both sides.
> Gordon
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61362 is a reply to message #61339] Fri, 23 October 2009 18:12 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma: 1
Senior Member
Gordon,

I once threatened to bring my lawn chair and sit under a tree to learn
from Rick. Do you have a tree I can use?

Ken H.
> -----Original Message-----
> ...one of the blocks
> managed to flip around end on and jam itself between the two wheels on
> the passenger side. Both wheels skidded as the 4 x 6 was at a 45*
> angle, hooked in the tread of the tires and tight against the bottom of
> the bogie box. I had to use my two bottle jacks on the frame, release
> the air from the bags, let the air out of the tires and then split
> pieces off the block to get it out. The shop owner was most amused at
> this performance in the rain. He was even more amused when I stripped
> off my filthy wet clothes and drove away in my shorts and "T" shirt. I
> didn't want to get my coach dirty. The Harrison 4-Bay suspension came
> out unscathed.
> Gordon "Resting peacefully, after a hot shower".

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Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61363 is a reply to message #61359] Fri, 23 October 2009 18:18 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
Rob, I think you have that "fix" well thought out.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61367 is a reply to message #61359] Fri, 23 October 2009 18:23 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
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Senior Member
Rob,

Before you settle on the reinforcement method, be sure it will allow R&R
of the air hose fittings between the bag support plates.

Ken H.

Rob Mueller wrote:
> ...If you look closely at the fixed view you will see the only thing keeping
> the vertical bag supports apart is a small rod in the center. The Blue
> Streak's PO installed this system and to prevent the bending I will weld
> four pieces of steel 1/4" thick and 1" long in between the two support
> plates at 6:00 / 9:00 / 12:00 / 3:00. I reckon that will take car of that
> problem.
>
> Rob Mueller
>

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Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61368 is a reply to message #61361] Fri, 23 October 2009 18:20 Go to previous messageGo to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
I got tired of bending down and used 32.5" to the center of the wheel
well.

Rob Mueller wrote:
> Gordon,
>
> Tom set the ride height to "his spec" using the slots in the frame and it
> translated to 33 inches at the center of the wheel well. The coach sits
> slightly down at the rear but it's almost level.
>
> I do have new THICK rubber blocks from Bert & Faye Curtis between the frame
> and body.
>
> Regards,
> Rob Mueller
> Sydney, Australia
> 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 Gordon
> Sent: Saturday, 24 October 2009 9:57 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>
> Rob;
> What ride height did you use to the center of the rear fender well?
> Thanks;
> Gordon
>
> Rob Mueller wrote:
>> Gordon,
>>
>> That's pretty good! The reason I asked is Double Trouble while being a
> 1975
>> Avion the chassis was built at GMC in November of 1974 according to Dave
>> Greenberg. It only has offset bushings in the back legs. The best caster
> Tom
>> Hampton could get was 1.9 Left & Right. I can't remember what he set the
>> front ride height at but he did set the rear higher than OEM spec which
>> would reduce the caster possible also. I am happy with the way it handles
>> but maybe some day I'll pop the upper control arms off and stick offsets
> in
>> the front legs also to see how much more caster I can get.
>>
>> Thanks,
>> Rob Mueller
>> Sydney, Australia
>> 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 Gordon
>> Sent: Saturday, 24 October 2009 9:32 AM
>> To: gmclist@temp.gmcnet.org
>> Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>>
>> 1. 1973
>> 2. Both offset bushings on both legs.
>> 3. 2.25 L and 2.75 R. Caster was the maximum we could get with the ride
>> height set to 13.25". If I lowered the ride height, which would change
>> the camber, I could then get more caster, with zero camber.
>> As usual, I did not follow directions. The alignment guy took a lot of
>> time to convinced me that the caster we ended up with would make the
>> coach go straight on a crowned road, hands off. He also told me that if
>> I was running on flat roads, in the desert, without crown, he would set
>> the caster even. It steers very well and does go straight, hands off on
>> a crowned road. My only problem is with my True Tracks which appear to
>> be binding badly. They make a heck of a noise on any uneven surface. I
>> will have to fix this problem or junk them. Maybe they wear in? Maybe
>> I need more than 0.010 clearance between the roller and the track? They
>> make the same binding noise on both sides.
>> Gordon
>>
>>
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61369 is a reply to message #61359] Fri, 23 October 2009 18:24 Go to previous messageGo to next message
Tin Gerbil is currently offline  Tin Gerbil   United States
Messages: 236
Registered: October 2006
Location: Vancouver Island, B.C.
Karma: 0
Senior Member
Rob;
I wish I had seen these pictures a couple of months ago. I always
assumed the uprights bent along with the cross plates. I still wonder
why my antics this morning did not bend them?
Thanks;
Gordon

Rob Mueller wrote:
> Dan,
>
> IIRC the Harrison system bends when you try to drive the coach with one flat
> tire which is no problem on the Q-bagger.
>
> Here's some photos of a bent bracket.
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=19032
>
> Here's the fixed view:
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=19033
>
> If you look closely at the fixed view you will see the only thing keeping
> the vertical bag supports apart is a small rod in the center. The Blue
> Streak's PO installed this system and to prevent the bending I will weld
> four pieces of steel 1/4" thick and 1" long in between the two support
> plates at 6:00 / 9:00 / 12:00 / 3:00. I reckon that will take car of that
> problem.
>
> Rob Mueller
> Sydney, Australia
> 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 Dan Gregg
> Sent: Saturday, 24 October 2009 8:37 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.
>
> Gordon, I do not know how it happened but I have seen the Harrison bags with
> a badly bent bracket. Not saying anything bad about them but I do like that
> heavier bracket myself.
> Dan
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Gordon '74 Canyon Lands "Tin Gerbil" Vancouver Island, B.C.
Re: [GMCnet] Wheel Alignment, Suspension and Entertainment. [message #61374 is a reply to message #61368] Fri, 23 October 2009 18:47 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gordon,

If you have the original body/frame pads I'd say the Tin Gerbil is set at
the same ride height as Double Trouble! ;-)

Regards,
Rob Mueller
Sydney, Australia
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 Gordon
Sent: Saturday, 24 October 2009 10:21 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Wheel Alignment, Suspension and Entertainment.

I got tired of bending down and used 32.5" to the center of the wheel
well.



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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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