I found a D8 for sale, the owner thinks its a D82u but he hasn't found the serial # yet. Where would the serial # be located on this dozer? Also this dozer has two exhaust stacks, does this help identify it? Would you need permits and/or escort to move this dozer? A big thanks for any help.

Take a look near the front of the engine under the water pump area. The 1H serial number is there, mot sure about the 8R. They are pretty hard to tell from a 2U. My 1H had twin stacks at one time.

Hi, 98zx9r.
If it is a 2U, there 'should' be a serial # tag on the left side of the engine block just above the pony motor pinion clutch housing and another on the left rear of the steering clutch case. If the rear one is missing, there 'should' be a serial # stamped into the housing where the tag 'wunce wuz'. If either tag is missing, there may be either the remains of the rivets or small holes where the rivets 'wunce wuz' to show the location. Look for a stamped serial # between the rivets/holes.

For the blade, there may have been a serial # tag on the right side on the back face of the blade, inboard of the tilt brace ball joint and perhaps a little lower. Again, no tag, look for rivets/holes/stamped serial #.

If it is a 2U, there is also a chance that it is what is called a Hi-Output version. These had the horsepower boosted, including the twin exhaust stacks, the gearbox modified and the rear end strengthened for push-loading scrapers. There may also be the remains of 'Hi-Output' decals on the sides of the hard nose between the mounting bolts and the D8 decal.

Hope this helps.

The twin stacks dont mean alot. I have a good friend that converted all of his older 8s to twin stack. They do sound nice as twin stack units.

982x9r,


I’m going with the boys saying it most likely just an old D8 and not a “Hi-Out Put” I saw a few of those old cats with twin stacks and were not a “Hi-Out Put” the assemble that held the single stack on was removed and flanged up with two stacks.

If you can’t find the SN as Deas has said, take a shot (photo) of the deck there is some tall-tail signs that may help in identifying what you have. I note the dozer has a 6 part line most of those old dozers were 4 part line, at least on that older radiator and dozer shroud.

But at any rate it appears to be a good find, for an old “Timber Tick Tractor”.

Kelly

Could be an early 2U1-9661.
They were the last to use the cast iron radiator top tank like that.
Think I see a vertical pony crank behind that air cleaner, which came in during that era.
Check for a slide bar transmission shifter.....used up to 2U5307.

No telling what parts came and went over the service life, it has it's share of modifications.