| 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. |
| 10 | RI | 190-199 | 5/69 | 37128-37137 | IIc | paper | Rock Island |
| 5 | RI | 285-289 | 1/69 | 36969-36973 | IIc | paper | Rock Island |
| 10 | RI | 290-299 | 7-8/68 | 36822-36831 | IIc | paper | Rock Island |
| 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 |
|
U33B Phases 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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