5690809 Flange & Cplg Assembly - bolt orientation

[Michael H.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Here is a portion of the actual 1963-66 steering gear assembly drawing. Note that the flange and coupling assembly was shipped from Saginaw attached to the gear. The orientation of the flange and coupling assembly was such that the attaching nuts were pointing toward the steering gear.



Also there was a note on the drawing indicating that the gear should be painted "all over" with black paint except the pitman shaft. I assume that the note meant that the flange and coupling asm would have been attached and painted as well.

The attaching pinch bolts to the steering gear input shaft and to the flange on the steering column were both listed as 5686553. The bolt used to attach the flange and coupling asm to the steering gear input shaft was supplied and assembled at Saginaw. The bolt used to attach to the flange and coupling assembly to the steering column was supplied by Chevrolet and assembled at St. Louis (the bolt outline is dotted in the side view of the gear.)

Jim

Thanks Jim.... Great info ! Hopefully this drawing will end the debate about the installation direction of the coupler. And, it will also prove what I've been saying for a long time. The 63-66 (and most likely 67) steering gear AND coupler were painted black before shipping to the St Louis assembly plant.

[Jim R.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Nice work Jim thanks.

[Jim R.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Thanks Jim.... Great info ! Hopefully this drawing will end the debate about the installation direction of the coupler. And, it will also prove what I've been saying for a long time. The 63-66 (and most likely 67) steering gear AND coupler were painted black before shipping to the St Louis assembly plant.

Michael now that we have this info would you think that the JG book needs a change, the book has the standard rag joint orietation with the nuts at the top and both the Gear box and Rag Joint as natural cast, not painted black as the blueprint drawing suggest.

[Michael H.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Michael now that we have this info would you think that the JG book needs a change, the book has the standard rag joint orietation with the nuts at the top and both the Gear box and Rag Joint as natural cast, not painted black as the blueprint drawing suggest.

Jim,

I think this information was sent for revision of the 5th edition. I believe it was sent again for the not yet released 6th edition too. We'll have to wait and see how it goes.

[Jim R.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Jim,

I think this information was sent for revision of the 5th edition. I believe it was sent again for the not yet released 6th edition too. We'll have to wait and see how it goes.

That sounds good thanks Michael

[Jim R.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Gary here is the drawing from jim shea

Here is a portion of the actual 1963-66 steering gear assembly drawing. Note that the flange and coupling assembly was shipped from Saginaw attached to the gear. The orientation of the flange and coupling assembly was such that the attaching nuts were pointing toward the steering gear.



Also there was a note on the drawing indicating that the gear should be painted "all over" with black paint except the pitman shaft. I assume that the note meant that the flange and coupling asm would have been attached and painted as well.

The attaching pinch bolts to the steering gear input shaft and to the flange on the steering column were both listed as 5686553. The bolt used to attach the flange and coupling asm to the steering gear input shaft was supplied and assembled at Saginaw. The bolt used to attach to the flange and coupling assembly to the steering column was supplied by Chevrolet and assembled at St. Louis (the bolt outline is dotted in the side view of the gear.)

NOTE: Section D-D there is a indentation on the end of the gear input shaft. It is vertical when the gear is exactly on center. The flange and coupling assembly assembles to the input shaft with the pinch bolt saw slot in line with the indentation.
Jim

[Alan D.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

And here is the "mark" on the shaft noted in print

[Scott S.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Here is a portion of the actual 1963-66 steering gear assembly drawing. Note that the flange and coupling assembly was shipped from Saginaw attached to the gear. The orientation of the flange and coupling assembly was such that the attaching nuts were pointing toward the steering gear.

Jim,

A few of the part numbers and torque numbers are too small to read, when you have time could you confirm or correct them for me?

It looks like the Steering Gear Top (a.k.a. Side) Cover bolts are GM 178537, but the GM parts books show that p/n as an internal/external tooth lock washer. Can you make out that p/n clearly? It looks like the Lock Washer to the steering gear top cover bolts is GM 187120, is that correct?

Also, at the top of the blueprint two part numbers are called out for Nuts (one optional). It looks like it says GM 5976217 for the first, and GM 5666499 just below, is that correct?

Does it say to tighten the Nut 90-100 FT LBS?

Thank you,

Scott

[Jim S.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Scott,
Here is the scoop on the side cover (aka top cover) adjuster nut.
It was released in 1962 on the 5677641 manual steering gear assembly as 114495 Nut, Hexagon with a torque spec of 18 to 27 ft-lbs. It never changed all the way through 1993 with the 7819668 manual steering gear assembly (both production and service).


There are several revisions with the side cover (aka top cover) bolts.

Original release as 179837 Bolt on the 5677641 Steering Gear Assembly in 1962. Also 187120 Washer used with each bolt. Torque spec was 25-40 ft-lbs.

Next gear assembly was 7806900 released April 68 with 7807009 Bolt. Torque spec 30-40 ft-lbs. No washers.

Next gear assembly was 7812913 released in 1971 with 7807009 Bolt. Torque spec was 25-35 ft-lbs. No washers.
For a short time during 1971 there was a different bolt used 7813502 then back to 7807009.

Last gear assembly was 7819668 released in 1974 and used for service through 1993 with 7807009 Bolt. After 1993 the bolt was changed to 7835434. Torque spec was 25-35 ft-lbs and was revised to 25-40 ft-lbs in Nov 84. No washers.

There should be at least one more manual gear assembly with telescoping column 1965-1966. I can't seem to find the assembly drawing but the side cover nut and bolts would be the same as the 5677641 Steering Gear Assembly since the only difference would be the flange and coupling assembly on the gear.

Hope that this answers your questions.

Jim

[Jim S.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Scott,
Sorry I missed the Adjuster Lock Nut on the 5677641 Steering Gear Assembly. There are two nuts optional to each other 5676217 and 5666699 with torque spec of 70 to 100 ft-lbs.

Same nuts, same torque spec as above with 7806900 Steering Gear Assembly

New 5676217 Adjuster Lock Nut with torque spec of 70-110 ft-lbs used on 7812913 Steering Gear Assembly.

Same nut, same toque spec as above with 7819668 Steering Gear Assembly.

Jim

[Scott S.]

Re: 5690809 Flange & Cplg Assembly - bolt orientation

Jim,

Thanks VERY much for the detailed reply, torque specs and part numbers!