D6B 44a considering for first dozer

The undercarriage looks well worn on it, and plenty tight. At least it has the bolt on segments for the sprocket, those are nice. As long as you aren't using it all day every day, that undercarriage should still last a few years. Wouldn't be a bad buy if you got it for your offer price.

Looks like it was originly poney start. Was it converted to direct electric start. The poney motor used on this model was a very poor design and likely to self destruct.

I believe the pony is still there. It is electric start. Can anyone tell me how to operate it? I’m not sure if it’s shuttle shift or not. It has two levers on the right side that only go forward and reverse.
Also one steer clutch feels fine but the other (right side) feels like it’s stuck open. You pull the lever all the way back and there is no resistance. Would that be because of the booster?

Here’s a picture of the winch.
Also the measurements of the rails from the front of the first pin to the front of the fifth pin are 27”7/8 left side and 27”3/4 on the right. They are Berco rails part # cr2822 and cr2821. These seem to be 6.91 (6.903). Why do I read that those are better than 6.75 which was original?

6.91" is the current replacement for the non-current 6.75"
6.91" is the match for segmented sprockets
27-3/4" is 30% worn, 27-7/8" is 40% worn.
What do you have left for adjustment?
Bushing OD looks to be worn more than what would be expected for the rail pin/bushing wear.
Rail height is 4.06" new, 3.69" is 100% worn.

Tractor is a standard pattern 5 speed manual with first gear forward and to the left. Outer stick is forward and reverse shifter. Forward is with stick back next to seat cushion. Push forward for reverse in 1-4 but if the left stick is in 5th, the reverser doesn't affect it, only goes forward in 5th gear.

I agree with the assessment by OM, unless the internal pins and bushings measurement across 4 links of track is low because the track is not stretched and there is more internal wear than your measurements indicate, the external "drive" surface of the bushings are worn dramatically more than expected. The bushing wear does match the sprocket segment wear fairly well. May be a case of accelerated wear because of the sand you mentioned. The other part of track wear is rail height and roller wear. I guess pictures of the pin bosses and track rollers from the side are probably pretty hard to get until the snow is gone!

Those Berco numbers can't be sealed track can they?

Where is the front idler support in relation to the end of the track frame? At 30% wear there should be several inches of track frame exposed in front of roller support. Maybe there was a pin and bushing turn done on a set of tracks with a lot of previous reverse travel wear from before the turn?

You might want to spend some money on new sprocket segments to prolong the useful life of the track system. They will wear way faster than normal when used with worn tracks, but may be worth sacrificing to the aim of getting by without replacing everything right now $$$$$$$ The good think is you can replace them pretty easily after loosening the track.

The steering clutch may be stuck open or more likely the release bearing has failed. The good thing about that tractor is the steering clutch can be unbolted and lifted out the top after removing the seat

Thank you gents for your work in helping me out. This forum is a pretty darn incredible resource for guys like me who like to do things themselves.
I’ll see if the owner bites at my offer. I’ve looked at a few dozers. Case450, td9 ih, td15, dresser td7g. All needed stupid amounts of work for the asking $. I hope I’m not too far off on this offer. I’ll let you know.
Thanks again
Dizzel

Heard back from the owners son. Looks good. Owners thinking about it for a couple days but the son says yes. I’ll of course wait for confirmation but it’s encouraging anyway. I know the family. Good hardworking people.