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Re: [GMCnet] GMC Parked after Turn [message #243977 is a reply to message #243944]

Mon, 17 March 2014 17:45

USAussie

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

Karma:

Senior Member

Bob,

What KenH is looking for is photos of the rear wheels of a GMC forming an "X." By that I mean the top of the middle wheel is tilted
inwards (negative camber) and the top of the rear wheel is tilted outwards (positive camber).

What I am about to describe is from memory and I may have gotten it a bit wrong regarding the way the wheels tilted, hell it is SIX
years ago!

I attended the Santa Rosa GMCMI Convention in the spring of 2008. The exit ramp from the RV parking area led onto a highly crowned
road. Basically the exit ramp and road formed a "V." The ramp went down into the gutter and the crown went up. I was standing next
to the exit ramp when a GMC pulled out and turned to the right. As the rear wheels left the parking lot ramp the top of the middle
wheel tilted inwards and the rear wheel tilted outwards as they "climbed" the road's crown. I may have it backwards but I ga-ron-tee
you that they formed an "X!" I got so excited that I ran after that GMC to tell the driver that he had a problem with his rear
suspension. I couldn't catch it so memorized the license plate number so I could find out who owned the coach and tell the owner.
When I got to the registration area I described what I had seen and wanted to know who owned the GMC so I could tell him about his
problem. The person I spoke to laughed and noted that was "normal." That surprised me so I described what I'd seen to a few other
GMCer's and they all told me the same thing; it was normal.

If you look carefully at the photo you'll see a curved tire track that starts just behind the front wheel and ends up directly under
the middle wheel. IF that tire track was formed when the coach backed up is it possible that was caused by the tire scrubbing
sideways when it backed up which in turn caused the negative camber?

Given what I have described I'm wondering where / what twists to allow the wheels to do this? Is it the horizontal part of the bogie
arm? Does the bogie box twist on the frame? Does the arm that the airbag is mounted to move in and out as well?

Comments please.

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

-----Original Message-----
From: Bob de Kruyff

That coach has serious issues that don't reflect what Ken is talking about. The negative camber is way too much.
--
Bob

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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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[Message index]

		[GMCnet] GMC Parked after Turn By: Ken Henderson on Sat, 15 March 2014 19:14
		Re: [GMCnet] GMC Parked after Turn By: Matt Colie on Sat, 15 March 2014 19:21
		Re: [GMCnet] GMC Parked after Turn By: Otterwan on Sat, 15 March 2014 19:39
		Re: [GMCnet] GMC Parked after Turn By: Ken Henderson on Sat, 15 March 2014 19:57
		Re: [GMCnet] GMC Parked after Turn By: Dennis S on Sat, 15 March 2014 20:10
		Re: [GMCnet] GMC Parked after Turn By: Otterwan on Sat, 15 March 2014 20:18
		Re: [GMCnet] GMC Parked after Turn By: Bob de Kruyff on Mon, 17 March 2014 13:24
		Re: [GMCnet] GMC Parked after Turn By: USAussie on Mon, 17 March 2014 17:45
		Re: [GMCnet] GMC Parked after Turn By: Bob de Kruyff on Mon, 17 March 2014 19:44
		Re: [GMCnet] GMC Parked after Turn By: Galen on Mon, 17 March 2014 17:45
		Re: [GMCnet] GMC Parked after Turn By: Ken Henderson on Mon, 17 March 2014 21:34
		Re: [GMCnet] GMC Parked after Turn By: Ken Henderson on Mon, 17 March 2014 21:38
		Re: [GMCnet] GMC Parked after Turn By: Bob de Kruyff on Mon, 17 March 2014 21:50
		Re: [GMCnet] GMC Parked after Turn By: Ken Henderson on Mon, 17 March 2014 22:16

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