Caterpillar d6 9u value

[56Bulldog MT406]

In Montana
Im looking at this 1956 d6 9u cat and wondering what it's worth.
It's been parked about 22 - 25 years because the pony motor lost the rod bering cap.
The diesel motor has been rebuilt with an unknown number of hours (not very many from what I've gathered) with a brand new pony motor put on shortly after (the one that's currently self destructed). They have the original pony motor but it's been sitting in the loft of their barn open to the elements (no plugs, intake and exhaust are open, and can see some rust on the plug threads going down into the cylinder). It has an aux hydraulic pump on the back and also a dual drum winch setup that comes with it. The undercarriage leaves alot to be desired but should be good enough for the amount I'll use it, and the blade trunnions are completely shot but i have a welder who can get them back to usable.

Id like to know what it's worth as it sits, and what it would be worth running.

Last photo is a friend's 1957 d6 9u with a turbo that had been sitting since 2004 in a barn

 

[Fritz Maurer]

Id snare that if it were close to me. Pony engine no problem especially if you have a spare to build one out of.

Do you have to get it running on site or does the guy have something big enough to push it on the trailer?

 

[56Bulldog MT406]

Id snare that if it were close to me. Pony engine no problem especially if you have a spare to build one out of.

Do you have to get it running on site or does the guy have something big enough to push it on the trailer?

I have to get it running where it sits then track it about a mile out to where I can load it

 

[Old Magnet]

Couple of plus features....Appears to be an oil clutch version and segmented sprockets, probably the 6.91" pitch track upgrade.
Might make the $5K mark if it runs well even though the undercarriage is well worn.
Not late enough to have the flywheel housing drilled for direct electric start. So it would be a pre-1955 model.

 

[rustred]

1500-2000 as is . its had a hard life.

 

[the tractior vet]

I see a old plum slap wore out D 6 and bottomless money pit . the only bright side is the fact the rear sprockets have been upgraded from org. . On the org sprocket's when they wore out you had two choices , one pull the sprockets off and replace and that was a ton of bull work or cut the sprocket ring off the spokes and weld on a new sprocket ring . the blade trunions are plum slap wore and i have never seen any wore that bad . Way back my first job was at a large construction company , there they had 12 D 6 9U's . For the day they got the job done , ya knew you put in a long day in the seat running one . I ran them sometimes . Used them for smaller jobs or as clean up and finish grade on big jobs. Been into the innereds of them from the fuel tank to rad. . Like all cats diving into final drive repair got scary pulling them apart . Winter months were tear down and repair months and working in the shop . This is where ya got to see the weak points . The segmented sprockets to me look like about 25-30 percent left , the chain looks good BUT ya can't see the ware on the bushings . Blade trunions they USE to make replacements you cut the old off and welded new ones on , blade arm caps are plum wore out .