I have found a oil and water cooled S300CG Borg Warner. Yes, a water cooled S300. However, I cannot find ANY specs on it at all.
Its a Borg Warner S300CG part number 176488.
Also looking for info on two other Borg Warner turbos,
S200S057 pn RE515501
S2A pn RE508971

Any info or a place selling rebuild kits for any of these 3 turbos would be great!

 

I did a quick search and came up with these items for you to browse through:
https://www.google.com/search?q=s300...ient=firefox-a

This link has your part number associated with it, so it might provide the info you need:
02-08 Caterpillar Military S300CG Turbo 176488

I found this for the S200S057:
https://www.google.com/search?q=S200...ient=firefox-a

And this for the S2A (RE508971):
RE508971 turbochargers, RE508971 turbo, RE508971 turbocharger, RE508971 diesel injection

I hope these help in some way.

 

the s200S057 has a 57mm compressor wheel, and a john deere PN RE51501, same with the S2A, john deere PN 508971( the prevoius info states its for a 4.5l, so pretty tight)... the S300CG, identifies it being gated (G is gated, the previous info says it has an .80A/R turbine housing and its off a 7L, so best choice of the three) hope this helps...