Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
> 1940 1960
> Cook County
> Caterpillar tractor D2 pto to belt drive converter
Caterpillar tractor D2 pto to belt drive converter
CATERPILLAR TRACTOR D2 PTO TO BELT DRIVE CONVERTER
Once upon a time, when we first had just purchased our farm, there was a Caterpillar D2 Agricultural model tractor that the sellers had left behind as there was no place in the nursing ome for the thing. I wish I had paid more attention to it and had a better understanding of what it was and the treasure it is to some of you reading this. Unfortunately I did not, and several years along we sold it, more to make room for other stuff in the shed, than for the money. Physically it was in pretty good shape and I would not be surprised to discover it is out there somewhere, restored and now your treasure.
Now I am in the process of cleaning out the shed, or what is left of it after last winter's heavy snows, which pretty well flatted it and several other structures. It has compelled me to work my way under the roof and discover what things still reside there, to remove or salvage them so that things of value, materially or historically, are not destroyed with the demolition of the roof which already has a head start on the process.
In looking, I have been finding. One of the things I had forgotten was there, is the PTO to BELT DRIVE attachment shown in the images. The item is sitting on a standard dimension real estate sign [nominally 18 by 24 inches]. It is not a small nor lightweight item. It probably weighs around seventy five pounds or more. My apologies for the poor pictures, but when photographing in the dark with strobe and night imaging capability, you cannot be as picky. The item is also pretty much as I found it, sitting on the gravel floor of the shed, certainly not pretty and clean, but not damaged either. I do not clean things like this up to photograph as it opens them up to damage from moisture and dirt. You get to clean the grease and oil when you restore and service it.
Mechanically the unit seems to function perfectly. It turns smoothly, the casting housing, while covered with faded yellow paint, showing slight amounts of rust, and being relatively dirty, strikes me as being ready to use. The belt drive surface is approximately eight inches in width and the pulley perhaps nine plus inches wide, with the pulley being perhaps ten inches in diameter. I have not measured it for specific dimensions.
The smaller green thing that shows in one of the images is a John Deere PTO drive part that has nothing to do with this Caterpillar item. Please ignore it, unless you are wanting one and it is listed separately.
The part number shown in the images is cast into the body of the part. I have not found any other marking or identification, which is not to say that there isn't something else to find. It will take cleaning to do it, however. That number 4B9570 comes up in the Caterpillar part records as a housing for ????. The records do not identifiy application, only that it is a valid housing number and is no longer an active nor available part from Caterpillar.
My research for verification of this as a D2 part is based on the fact that there was at one time a D2 on the property. The Caterpillar parts person who helped me was able to find a reference to a group of PTO drive components for D2 in the microfische archives, but no furthere explaination and was not able to provide any images of the parts reference. In searching the various web sites for D2 enthusiasts and their various toys, I discovered that no one takes pictures of the rear end of their tractor, or at least no one posts them. Except for a single image of the newly restored clean and pretty back side of the differential gear box on one D2 of the correct age and such, which has no PTO output shaft installed, where the cover plate for that tractor is an almost perfect match for the size and bolt pattern of the mounting face of this PTO drive unit.
Someone with better reference data than I have access to can probably find the part and the exact models this PTO unit will fit. It may work on other model tractors, and I would be surprised if it did not, but I have no basis for that conjecture and don't want to represent that it does when in fact I do not know. I was left with the impression that the casting housing was a component that was used for a variety of applications, but the parts records are too old and too long ago to tell us that easily.
Please feel welcome to ask me whatever you need to know. No gaurantees I can answer usefully, but it is fun to try;.
