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Re: [GMCnet] lower steering shaft complete new replacement [message #266542 is a reply to message #266529] Sat, 22 November 2014 18:35 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Karen,

I did not ask my question with enough detail.

For clarification the following comments assume an OEM steering wheel with two spokes as pictured in Parts Book 78Z page 16-14.

The procedure Alex uses sets up the following conditions:

1) Steering wheel spokes perpendicular to the GMC's fore / aft axis

2) Lower (AKA intermediate) steering column CV joint, slip joint, and universal joint assembled and clocked as per Maintenance
Manual X-7625 / Page 9-3 / Figure 1 - Lower Steering Shaft (Disassembled)

3) The splines in item 7. Flange in Figure 1 installed into to the spline on the steering column with the correct clocking /
orientation of the bolt and the slot in the Flange and the recess in the steering column. As I understand it, it is possible to be
off one spline clockwise or counter clockwise.

4) Item 10. Yoke in Figure 1 attached to the steering box input shaft with the correct clocking / orientation of the bolt and the
slot in the steering box input shaft (determined by using a 29/64 inch drill).

5) Steering box input shaft oriented as per the photos in Alex's procedure.

6) Drag link / tie rod ends set so that the wheels are oriented for straight ahead travel.

Your comments about not being able to phase the Borgeson and Flaming River joint made me think it would effect the steps above,
however, upon a bit more thought I realized that's not a problem as the tie rod ends can be adjusted to set the box on center with
the steering wheel oriented as noted in step 1 above and the wheels oriented for straight ahead travel.

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


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of KB
Sent: Sunday, November 23, 2014 10:26 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] lower steering shaft complete new replacement

no, it's not a problem with mounting the u-joint to the steering box. The problem is you can not orient
the two u-joints relative to each other on the DD shaft with correct phasing (so they cancel out each other's non-linear motion).
One of the u-joints would have to be rotated 90 degrees (so it's a mirror image of the one on the other end of the shaft).
But you can't do that because then it won't fit onto the DD shaft.

Karen
1975 26'

USAussie wrote on Sat, 22 November 2014 13:52
> Karen,
>
> Point of clarification, could you please advise some more details regarding; "Unfortunately these can only go on the DD
telescoping
> shaft one way, and that way is NOT correctly phased?"
>
> Are you saying you can not perform Alex's steering box alignment procedure?
>
> http://www.gmcmhphotos.com/photos/g6588-steering-box.html
>
> Regards,
> Rob M.
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426


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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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