66 Jack paint question

[Donald H.]

I took my 66 to our chapter judging meet this weekend. I got either just a comment or comment and deduct (not sure which until I see the sheets) on my jack paint. The screw shaft on my jack is unpainted steel, the judge said the screw shaft should be painted black.

The 66 TIM&JG says "The jacking screw is natural steel with an off-white nylon washer sandwiched between two large zinc/cadmium plated steel flat washers under the 3/4" hex head..."

I also checked the 67 TIM&JG just to make sure there wasn't some confusion. The 67 guide says "The jacking screw is natural steel with an off-white nylon washer sandwiched between two large zinc/cadmium plated steel flat washers held in place by a 3/4 inch nut."

The pictures in both guides of the jacks sure look like the shafts are painted, and since the judge was a senior judge I have no reason to really doubt his comment.

SO, are both guides incorrect?

[Richard M.]

Re: 66 Jack paint question

Don,

It is my understanding that the jack was painted without the screw then later assembled. Additionally, I doubt the white nylon washer wouldn't get paint on it if the assembly was painted.

I don't have "any" Judge status so I could be totally misinformed. However, I've seen a few original jacks in my time and the screw appeared raw unpainted steel.

Besides all of that, if the screw was painted, it would be pretty difficult to thread it into the threaded coupler.

Rich

[Joe R.]

Re: 66 Jack paint question

Actually the jack was dipped and not painted with a spray gun. Now you ask, how did the screw not get painted if the jack was dipped in a vat of paint?
The jack was suspended by the screw and conveyed thru the painting process and the screw along with the washers, 2 cad plated and 1 nylon was assembled later.
So the screw was sometimes painted only half way, more or less along with the nut that was attached to the screw. Then when the other components were added they were not painted.
So the judges and the judging manual was partially right and partially wrong.

JR

[Rick A.]

Re: 66 Jack paint question

JR thank you for that very diplomatic DEPENDS answer! (VBG)

[Donald H.]

Re: 66 Jack paint question

OK, so I assume the shaft was screwed all the way in (the jack in the full up position)
then the nut end of the shaft was dipped first enough to cover the jack.

does this sound close to right?

[Richard M.]

Re: 66 Jack paint question

Hmm, I'm a bit confused.

JR, Was the screw in it's normal threaded trunnion?

Or was the screw put in backwards in the solid unthreaded trunnion, ie, the normal end where the bolt end is, then the screw tip was grabbed by a wire or some threaded fixture?

Here's a '67 C7 Jack. Screw is unpainted, but the big nut is and part of the shaft is.

[Richard M.]

Re: 66 Jack paint question

A friend sent me these photos of his original 1966 Jack. Big pics this time for ease of viewing.

It certainly appears that part of the screw was painted just a s JR said. In order for this, it was likely screwed in to extend the jack so part of the unthreaded shaft as well as a few inches of threads got paint.

What's odd to me, is that the screw would then have to be unscrewed, then the washers, bushing installed, then the drift pin installed after the paint process. Also, if it was dip painted, why is there no coverage near the trunions? Quick Dipping?

Rich

[Alan D.]

Re: 66 Jack paint question

Rich, "Or was the screw put in backwards in the solid unthreaded trunnion, ie, the normal end where the bolt end is, then the screw tip was grabbed by a wire or some threaded fixture?"
Think you have it right since using that method only requires to slide the screw end into the hole, once dipped (and dry) simply pull screw out, put washers on, screw into nut, and add final solid drift pin. That seems to be the quickest way.

[Donald H.]

Re: 66 Jack paint question

Rich, thanks for the pictures. I'll take mine apart today and get some paint on the nut end and shaft.