Reply to JordanFarms:
Well I bought it about a month ago, but I haven't a clue how to read the serial number and such to verify age and weight. Honestly I'm more concerned about knowing the weight so I know what size trailer to get! Lol. The dozer runs fine, I've been pushing ever so hundred tons of creek rock and dirt with it and it's a very good stout machine.
That's a 1970 model with 65 hp D330c engine.
Bare tractor weight is about 15,000 lbs. You'd have to add up all the attachments weights, winch, fair lead, angle blade, hydraulic control unit, rops, etc. I don't have all of those weights. I'd guess in the 22,000 lb range. Need to hear from someone that has scaled a similar model.