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Home » Public Forums » GMCnet » Steering Relay Tie Rod:
Steering Relay Tie Rod: [message #237899] Wed, 29 January 2014 00:15 Go to next message
noi is currently offline  noi   United States
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Registered: October 2010
Location: South of Fremont
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Senior Member
Greetings:

I am in the process of rebuilding my front clip and have started to reinstall the steering "linkage" parts.

While looking at the steering relay tie rod, it appeared to have a small "bow" downward - As if it were "compressed" down and NOT "bent" up as if something had pushed against it (like a floor jack).

I do not think this is "normal".

I have also looked in the MM and read up on how to check for rod parallelism, but unfortunately, I can not do this till AFTER I re-install everything.

Thus the question.... Is this anything I should be concerned about? - Or is it fairly normal for a vehicle of this size/weight/age?

Looking for thoughts/suggestions/insight.

Thanks for whatever you care to share.

Carl P.
76 Birchaven
South of Fremont
Re: [GMCnet] Steering Relay Tie Rod: [message #237903 is a reply to message #237899] Wed, 29 January 2014 00:53 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Registered: July 2007
Location: Sydney, Australia
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Senior Member
Carl,

GMC was a bit tricky with the nomenclatures they used and changed the names of parts between the Parts Book and the Maintenance
Manual!

For the purposes of this email let's call it the INTERMEDIATE ROD: Reference MM X-7525 SECTION 9 STEERING Figure 2 - Steering
Linkage.

I have looked at quite a few coaches and the intermediate rods were all straight.

With the intermediate rod laying on a flat surface how much is it bowed up?

BTW where did you find the rod parallelism check I can't find it!

Regards,
Rob M.
Sydney, Australia


-----Original Message-----
From: noi

Greetings:

I am in the process of rebuilding my front clip and have started to reinstall the steering "linkage" parts.

While looking at the steering relay tie rod, it appeared to have a small "bow" downward - As if it were "compressed" down and NOT
"bent" up as if something had pushed against it (like a floor jack).

I do not think this is "normal".

I have also looked in the MM and read up on how to check for rod parallelism, but unfortunately, I can not do this till AFTER I
re-install everything.

Thus the question.... Is this anything I should be concerned about? - Or is it fairly normal for a vehicle of this size/weight/age?

Looking for thoughts/suggestions/insight.

Thanks for whatever you care to share.

Carl P.
76 Birchaven
South of Fremont
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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] Steering Relay Tie Rod: [message #237905 is a reply to message #237903] Wed, 29 January 2014 01:36 Go to previous messageGo to next message
noi is currently offline  noi   United States
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Registered: October 2010
Location: South of Fremont
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Rob,

OK, intermediate rod it is Smile

MM X-7725 - (3A-2/3)

I will have to do a more "through" measurement in the morning, but.... On my "surface plate" quality fence rail Wink it looked to be about 1/4" when balanced "level" - And looking down the "edge", bow looks pretty "even" and not just one end bent - Kind of like squeezing a straw.

Carl P.
Re: Steering Relay Tie Rod: [message #238005 is a reply to message #237899] Wed, 29 January 2014 18:32 Go to previous messageGo to next message
noi is currently offline  noi   United States
Messages: 293
Registered: October 2010
Location: South of Fremont
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Rob,

OK, got the measurement of the bow on a flat surface - Turns out my fence post/eyeball 1/4" gestimate was pretty darn close!....

I took a straight edge and found a section of my driveway (yah, not as good as a surface table but probably good enough) that had only a crack of light showing under a 4' straight edge - Then zeroed out my digital level to the driveway slope.

Laid the rod "flat" (had to be held flat as it had a tendency to roll), placed the d/l in the center, and "leveled" the rod - Measured the distance from the top of the rod, at the tie points with a digital caliper (used that point as that was where MM said to take measurement), to the driveway (L=1.14 - R=1.12) - Then subtracted the "thickness" of each tie point (L=.87 - R=.85) - To get an off level reading of:

(L) ~ 1.14-.87=.27 (R) ~ 1.12-.85=.27

Pretty darn close the eyeball gestimate Smile

Here is a picture of the bow (yah, sure get a lot of use out of my driveway):

http://www.gmcmhphotos.com/photos/stuff/p52718-intermediate-rod.html

The bow looks fairly "even", so I don't think it was a result of something "external".

Anyway, appreciate any thoughts on this.

Thanks,

Carl P.
Re: Steering Relay Tie Rod: [message #238014 is a reply to message #238005] Wed, 29 January 2014 19:31 Go to previous messageGo to next message
Bob de Kruyff   United States
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Registered: January 2004
Location: Chandler, AZ
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""Here is a picture of the bow (yah, sure get a lot of use out of my driveway):

http://www.gmcmhphotos.com/photos/stuff/p52718-intermediate-rod.html

The bow looks fairly "even", so I don't think it was a result of something "external".

Anyway, appreciate any thoughts on this.

Thanks,

Carl P.""

I wouldn't worry about that a bit.


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: Steering Relay Tie Rod: [message #238016 is a reply to message #237899] Wed, 29 January 2014 19:32 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
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Registered: October 2006
Location: Woodstock, IL
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Senior Member
Are we talking rod from steering box to relay(drag link) OR relay to idler arm (center link). My guess is a mal placed floor jack?

John Lebetski
Woodstock, IL
77 Eleganza II
Re: [GMCnet] Steering Relay Tie Rod: [message #238158 is a reply to message #238005] Thu, 30 January 2014 18:35 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Carl,

I was down at the workshop yesterday and got under The Blue Streak to see what it's intermediate rod looks like, unfortunately since
it is installed there's too much stuff in the way to see if it was bowed or not.

Having said that I reckon since yours is bowed down and only 1/4" I wouldn't worry about it at all.

Regards,
Rob M.
Sydney, Australia

-----Original Message-----
From: noi

Rob,

OK, got the measurement of the bow on a flat surface - Turns out my fence post/eyeball 1/4" gestimate was pretty darn close!....

I took a straight edge and found a section of my driveway (yah, not as good as a surface table but probably good enough) that had
only a crack of light showing under a 4' straight edge - Then zeroed out my digital level to the driveway slope.

Laid the rod "flat" (had to be held flat as it had a tendency to roll), placed the d/l in the center, and "leveled" the rod -
Measured the distance from the top of the rod, at the tie points with a digital caliper (used that point as that was where MM said
to take measurement), to the driveway (L=1.14 - R=1.12) - Then subtracted the "thickness" of each tie point (L=.87 - R=.85) - To get
an off level reading of:

(L) ~ 1.14-.87=.27 (R) ~ 1.12-.85=.27

Pretty darn close the eyeball gestimate :)

Here is a picture of the bow (yah, sure get a lot of use out of my driveway):

http://www.gmcmhphotos.com/photos/stuff/p52718-intermediate-rod.html

The bow looks fairly "even", so I don't think it was a result of something "external".

Anyway, appreciate any thoughts on this.

Thanks,

Carl P.


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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] Steering Relay Tie Rod: [message #238165 is a reply to message #238158] Thu, 30 January 2014 21:04 Go to previous messageGo to next message
Bruce Hart is currently offline  Bruce Hart   United States
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Registered: October 2011
Location: La Grange, Wyoming
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Senior Member
Carl, I have one if you are interested.
I am planning on going to the International in Montgomery in March if that
works for you.


On Thu, Jan 30, 2014 at 5:35 PM, Robert Mueller <robmueller@iinet.net.au>wrote:

> Carl,
>
> I was down at the workshop yesterday and got under The Blue Streak to see
> what it's intermediate rod looks like, unfortunately since
> it is installed there's too much stuff in the way to see if it was bowed
> or not.
>
> Having said that I reckon since yours is bowed down and only 1/4" I
> wouldn't worry about it at all.
>
> Regards,
> Rob M.
> Sydney, Australia
>
> -----Original Message-----
> From: noi
>
> Rob,
>
> OK, got the measurement of the bow on a flat surface - Turns out my fence
> post/eyeball 1/4" gestimate was pretty darn close!....
>
> I took a straight edge and found a section of my driveway (yah, not as
> good as a surface table but probably good enough) that had
> only a crack of light showing under a 4' straight edge - Then zeroed out
> my digital level to the driveway slope.
>
> Laid the rod "flat" (had to be held flat as it had a tendency to roll),
> placed the d/l in the center, and "leveled" the rod -
> Measured the distance from the top of the rod, at the tie points with a
> digital caliper (used that point as that was where MM said
> to take measurement), to the driveway (L=1.14 - R=1.12) - Then subtracted
> the "thickness" of each tie point (L=.87 - R=.85) - To get
> an off level reading of:
>
> (L) ~ 1.14-.87=.27 (R) ~ 1.12-.85=.27
>
> Pretty darn close the eyeball gestimate :)
>
> Here is a picture of the bow (yah, sure get a lot of use out of my
> driveway):
>
> http://www.gmcmhphotos.com/photos/stuff/p52718-intermediate-rod.html
>
> The bow looks fairly "even", so I don't think it was a result of something
> "external".
>
> Anyway, appreciate any thoughts on this.
>
> Thanks,
>
> Carl P.
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
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Bruce Hart 1976 Palm Beach 1977 28' Kingsley La Grange, Wyoming
Re: Steering Relay Tie Rod: [message #238388 is a reply to message #237899] Sat, 01 February 2014 13:10 Go to previous messageGo to next message
noi is currently offline  noi   United States
Messages: 293
Registered: October 2010
Location: South of Fremont
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Senior Member
Bob & Rob:

Thanks for the input – That was pretty much my feeling as well…. Probably no big deal.

Also, before I took it off, it looked pretty “straight” as well – It wasn’t till I was able to lay it flat, with everything off it, and see the edge against a flat surface that I noticed the bow.

Bruce:

Thanks for the kind offer Smile - But, unfortunately, Montgomery Texas is a bit far away as I am in the Bay Area N.Cal.

Thanks for everyone’s time,

Carl P.
Re: Steering Relay Tie Rod: [message #238412 is a reply to message #237899] Sat, 01 February 2014 18:22 Go to previous message
noi is currently offline  noi   United States
Messages: 293
Registered: October 2010
Location: South of Fremont
Karma: 0
Senior Member
Addendum:

Yes.... The intermediate rod is supposed to be straight! - As would be expected.

I went up to JimK's today, with a straight edge, and measured two rod's in GMC's w/o engines (so I could easily get to the rod) and two rods from his parts bin.

They were all straight, based on laying a straight edge against them - Some small light "gaps" here and there, but to be expected in a forging of that length with dirt/grease on them.

After explaining what mine looked like, he offered me one of the straight rods for a good price - And even though mine was probably OK/useable, the "engineer" in me said.... Deal!

Carl P.
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