|Qty.||Road||Numbers||Date||Builder's #s||Phase||Air Filter||Notes|
|2||NYC||2858,2859||9/67||36397,36398||IIa||oil bath||ordered as U30Bs; later derated to 3000 hp without external change|
|26||PC||2890-2915||11/68||36868-36893||IIb||paper||to CR same nos.|
|10||PC||2916-2925||12/68||36939-36948||IIb||paper||to CR same nos.|
|10||PC||2926-2935||11/68||36929-36938||IIb||paper||to CR same nos.|
|20||PC||2936-2955||12/68||36949-36968||IIb||paper||to CR same nos.|
|15||PC||2956-2970||5-6/70||37936-37410||IIc||paper||cancelled RI order; to CR same nos.|
|16||SCL||1719-1734||12/67-1/68||36467-36482||IIa||oil bath||Blomberg trucks|
|13||SCL||1735-1747||10/68||36837-36849||IIb||oil bath||Blomberg trucks|
GE used a common body for the various U-boats, so this list is based on phases of the U30B.
Phase II with the forward radiator intake mounted high had oil bath filters; low-mounted intake was for paper air filters.
Phase IIa- entire hood below the radiator is wider than the area ahead of it, radiator intakes are redesigned, the raised section on the radiator disappears, a horizontal drip rail appears on the sides of the radiator, short exhaust stack, large taper just ahead of the radiator, pipe chain guards at right front corner.
Phase IIb- the taper just ahead of the radiator disappears, six equipment doors on the left side instead of eight.
Phase IIc- the intake screens become corrugated instead of flat, and project slightly from the hood instead of being flush-mounted.
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