[bmaverick]

Case Terratrac 320 ?

https://www.tractordata.com/industrial-tractors/000/3/3/335-ji-case-320-engine.html

420?

https://www.tractordata.com/industrial-tractors/000/4/1/417-ji-case-420.html

520?

https://www.tractordata.com/industrial-tractors/000/4/1/418-ji-case-520.html

Teen Restores Rare Dozer: a 1958 Case Terratrac

Fewer than 500 Terratrac 320s were built. Casey Havemann spent 600 hours restoring the vintage dozer for a high school competition.

www.equipmentworld.com

 

[bmaverick]

bmaverick thanks for the info but mine is supposed to be 50-53 model

I couldn't find one with the front grill like that nor the vertical posts for the hydraulic cylinders. Pogo Bill looks to of found it. What a nice history!

 

[bmaverick]

You're probably sitting on a '50???? American Tractor Company (A.T.C.) GT25 Terratrac dozer.
View attachment 90588


The GT25 was the start of the terratrac line developed in the late '40's and released for 1950. The GT 30 followed in '51

American Tractor Company History - Old Iron Garage

Although J. I. Case was actively engaged in the construction machinery business, particularly in the 1912-1920 period, it is curious indeed that they made no overt move into the crawler [...]Read More... from American Tractor Company History

oldirongarage.com

Making it BIGGER,
And the engine details are here too,

https://agro-specs.com/tractors/3855-atc-terratrac-gt-25.html

Engine Detail Continental F-124 gasoline 4-cylinder
Displacement: 123.7 ci 2.0 L
Power: 25 hp 18.6 kW
Rated RPM: 1850

Source: https://agro-specs.com/tractors/3855-atc-terratrac-gt-25.html

This restored GT25 sold for $4,000USD.

1950 Terratrac GT-25 Standard Track

1950 Terratrac GT-25 Standard Track

www.ironmartonline.com

There isn't a GT25 detail data sheet out there right now, but I did snag the GT30 off eBay and made it large to read.

 

[bmaverick]

And you can get all the engine parts today as well. Amazing.

http://continentalengineparts.net/continentalengineparts/f124engineparts.html

Engine manual.
https://www.tractorparts.com/PDFs/CONTINENTAL_L_HEAD_ENGINES_4_CYL_AND_6_CYL_OPS-MTCE.pdf

Engine OPS manual

https://www.numeralkod.com/cross/archivemanuals/continental%20motors/industrial%20l-head%20engines%20ops%20manual%20x-27057.pdf

Engine Overhaul Manual, see F-124 listing in charts,

https://www.numeralkod.com/cross/archivemanuals/continental%20motors/l-head%20engines%20form%20no.%20x-27053a/part%201.pdf

Replacement carbs are here, Look at Contin. F-124 variants.

http://www.pittauto.com/customer/piauel/pdf/zenith/ZENITH%20CROSS%20REFERENCE.pdf

 

[bmaverick]

Its in better condition than I thought. You are doing a good job operating the beast.

For my tractor, I would have to move that pile in reverse, turn the blade around and then diff lock the rear axle. I cleared plenty of acres doing it that way and to drag long heavy logs out. 2.5 years worth. It would of been faster with a dosser like yours.