Cable Control 9D30811 Is there a way to find out which tractors this unit was geared for when sold?
I believe they can be re-geared, so the sereal number may not give an absolute answer, but I would be willing to gamble...
Another way to determine would be the ratio of drum revolutions to input shaft revolutions. Does anyone know what this ratio is for the 3T units?
Thanks!

9D30811 uses a 14 tooth pinion and 22 tooth bevel gear driving a 37 tooth 12 tooth gear reduction.
I show all the 9D series using the same gearing up to and effective with 9D51,934-up except for the D6 unit which would have an 11 tooth pinion.

Hi Team,
just as OM said above but from the CCU SRB, Form No :- 10088-2, Dated :- 4-56, for all CCu's.
Cheers,
Eddie B.

Did Cat ever make a double drum CCU for a D4? I picked up a D4 sized cable scraper yesterday and am now on the hunt for a CCU. I know that Letourneau made one but don't know about others.

Pull the rectangular square cover off the bottom back and count your teeth as OM gave the counts. I have regeared units so you never know...

Thanks for your input.
As I was planning to do anyhow, I removed CCU 9D 5449 from a 3T that has been idle for quite a few years. It's a 4 digit SN 3T, but I don't have that number handy at the moment. The CCU spent most of its career on 3T 6543, which I happen to remember, as I used to get parts for it back in its dying years. (around 1969 to 1975) Anyhow getting the two units side by side, I have determined they are geared the same, with a ratio of 7.75 input to 1 on the drum. So that seems to be the simple answer to my question.
I doubt there are too many people out there looking for the answer to this question!
The plan now is to put 9D 5449 on another early 3T i acquired last winter, and hope we get a goodly amount of dirt moved per repair time and money. We shall see. I'll need to borrow some parts from 9D 30,811 to make it happen, but with the apparent condition of things, I think this is the way to go. (Hopefully what I need will be interchangeable) It took a few days to think where to look, but I have located most of the missing parts from 5449, except for the clutch discs. I doubt 30,811 will object to donating.
Digging around in the weeds, I think I have found everything else I need to convert from 24 CCU to 25. I don't even remember buying some of this stuff, but am glad I did back when availability was better, and nobody else wanted "that old junk"!
Scrappers and "scrap" thieves have been hard on the supply of things that were once plentiful. I am always happy when the price of scrap is low, and the scrappers are crying!

Thumps up to Uncle August on low scrap prices make me sleep better too.



May you find all the pieces you need in your own collection of misc.

"Ray54" wrote:

Thumps up to Uncle August on low scrap prices make me sleep better too.



May you find all the pieces you need in your own collection of misc.

Hey Ray54, I'm happy to find a fellow traveler who appreciates the high value of low scrap iron value!
I haven't been on for quite awhile, and I am not quite sure how to post and respond on this site, but thank you!
As a farmer, I don't always (almost never) get to the side projects when I want to, but I've been able to put in a few hours now and then on this project.
I intend to put up some photos and comments on my latest little hiccup. I still have hopes of getting this thing launched within a few days, with a little luck!

UH-OH! Look what I found when I removed the PTO cover...
I think I can still engage a little over one inch of good spline, full circle.
I'm going for it.
I have a theory on why someone may have done such a terrible thing, but I need to do a little more research to see if my idea is plausible.

Hi Team,
as far as I can recall that was a modification to remove an angled piece as such from the upper transmission shaft to allow easier removal of the Bevel Gear, I think that the mod. may be shown, along with dimensions in later D6 SRB,s.

I have reference to a Service Magazine article titled "Easier Bevel Rear Removal" in a Service Mag. dated from 1948, Volume 17, No 2, page 7, that alas I do not have.

Looking in a SRB for a 4R-5R D6 it says :- to remove the Transmission to enable the B.G. to be removed which explains what you see.

I recall doing that mod. once, with a grinder, on an upper shaft on the bench on a D6 that we did an end to end overhaul on back in the early 1960's.
I will look further but feel I have nothing more in print from Cat on it.
Cheers,
Eddie B.