Home » Public Forums » GMCnet » Steering Relay Tie Rod:
| Steering Relay Tie Rod: [message #237899] |
Wed, 29 January 2014 00:15  |
noi
Messages: 293
Registered: October 2010
Location: South of Fremont
Karma: 0
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Senior Member |
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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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| Re: [GMCnet] Steering Relay Tie Rod: [message #237903 is a reply to message #237899] |
Wed, 29 January 2014 00:53  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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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
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| Re: Steering Relay Tie Rod: [message #238005 is a reply to message #237899] |
Wed, 29 January 2014 18:32 |
noi
Messages: 293
Registered: October 2010
Location: South of Fremont
Karma: 0
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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 
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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| Re: Steering Relay Tie Rod: [message #238016 is a reply to message #237899] |
Wed, 29 January 2014 19:32 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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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
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| Re: [GMCnet] Steering Relay Tie Rod: [message #238158 is a reply to message #238005] |
Thu, 30 January 2014 18:35 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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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
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| Re: [GMCnet] Steering Relay Tie Rod: [message #238165 is a reply to message #238158] |
Thu, 30 January 2014 21:04 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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Senior Member |
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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
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| Re: Steering Relay Tie Rod: [message #238412 is a reply to message #237899] |
Sat, 01 February 2014 18:22 |
noi
Messages: 293
Registered: October 2010
Location: South of Fremont
Karma: 0
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Senior Member |
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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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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.