I'm trying to determine the year of my dozer, it's a 6S 3306 engine, serial number 95E11059, can't find
We're hanging out here, just waiting to hear, what you couldn't find! "6S" is a "straight" blade ("bulldozer" in Cat terminology) for a D6 tractor. 95E is the Serial Number prefix for that straight blade, and 11059 is the consecutive build number of the blade. With a 3306 engine and a 6S blade with that S/No, I reckon you've got a D6D. There should be an aluminium tag on the RH upper area of the vertical section of the dash panel with the tractor model and S/No on it. If the ali tag is gone, the tractor Serial Number is stamped in the upper vertical face of the rear housing, on the LH side. If you have a winch or ripper fitted, the number on the rear housing will be covered over.