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I have an older disc harrow and the axles have COOK-DISC Stamped on them. The units all have a larger 1/2 inch pipe plug between the outer and next disc, and two smaller, (one is 1/4 square and 5/16? square locknuts. The previous owner simply said just fill them with oil!! Well a squeak has...

I hope to be able to contribute as much to the forum as I receive. Currently I am searching a thread about the proper lube and procedures etc. for an older Cook Disc Harrow. I bought it quie a while ago and the previous owner said just put oil in the plugged openings. I suspect there is more to...