Regarding the cooling system. On my 73, #5595, I have a Pressure tank, the overflo tank, and then behind that, I have another tank. Which is very hard to see. I have looked in the illustrations from PPC, and P.I.M. and none of them show a 3rd tank,(canister) as I call it. Larger than the others, all black. I am sure one of you CAT people will have the answer. Regards, and I wish you all a Happy Hoiday. Karl
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