Published: October 25, 2026
By: Adam Burns
Electro-Motive switchers dieselized the Harbor. Eighty NW2s and forty SW7s were the heart of that fleet, in Pacemaker green and a lightning stripe livery that closely followed that of the New York Central's scheme, and the last steam fire was out by 1951.
Indiana Harbor Belt SW7 8877 on a caboose hop through Chicago’s 75th Street Station during a cold March day in 1964. Marty Bernard photo.
On this page: At a glance · Switchers · Road locomotives · Gensets · Roster · Slugs and boosters
| Item | Detail |
|---|---|
| Railroad | Indiana Harbor Belt. Company history |
| This table | Diesels that carried Indiana Harbor Belt numbers. A renumber is the same frame |
| NW2 | 80. 1,000 hp. Numbers 8715–8739, 8740, 8743, 8774–8802, and 8811–8834 |
| SW7 | 40. 1,200 hp. Numbers 8835–8850 and 8856–8879 |
| SW9 | 7. 1,200 hp. Numbers 9002–9008 |
| Fairbanks-Morse | 11. Two H10-44s and nine H20-44s |
| SW1500 | 28. Counted at 9200–9227. The 1500 series are the same frames, remanufactured |
| SW1200 | 2. Purchased after a lease |
| Road locomotives | 26. Six SD20s, five GP38-2s, two SD38-2s, and thirteen GP40-2 and GP40-2LW locomotives |
| Gensets | 8. Four 3GS21B locomotives and four 3GS21C locomotives |
| Total | 202 |
The NW2s are 80. Numbers 8715–8739 are Phase IV, 8740 and 8743 are Phase III, and 8774–8834 are Phase V. The number series skips 8741, 8742, and 8803–8810. Several of the 1948 and 1949 engines were traded to Electro-Motive in 1968, came back as NW2u locomotives, and took Penn Central numbers from 9158 through 9164. Numbers 8794–8802 went to the New York Central in 1966 and 1967. Number 8776 wore 1976 for the Bicentennial. Number 8834, serial 9480, was the last NW2 built. Numbers 8811 and 8814 were retired in July 2011 and traded for the 2140-series gensets.
The SW7s are 40. Numbers 8835–8866 are Phase I, and 8867–8879 are Phase II. The number series skips 8851–8855. Number 8835, serial 9460, was ordered as an NW2 and delivered as an SW7, the first SW7 built. Six of the early 1950 engines, 8836–8841, went to the Chicago River & Indiana in January 1965. Number 8877, in the photograph above, was sold for scrap in September 2002. Seven SW9s, 9002–9008, Phase II, followed in October 1953.
Fairbanks-Morse contributed two H10-44s and nine H20-44s, 11 frames. The H10-44s, class DES-14c, were renumbered 9104 and 9105 in October 1949 and sold to the New York Central the next February. Those are the same two engines. The H20-44s, classes DFT-1b, DFT-1c, and DFT-1e, went to the Central in 1949 and 1950.
The SW1500s are 28 frames, counted at the original 9200 numbers. GE in Mexico remanufactured most of them into the 1500 series between 2003 and 2005. Four of those, 1504, 1506, 1508, and 1514, were later converted to RP15BDF dual-fuel switchers, diesel and compressed natural gas. Numbers 9210 and 9218 kept their numbers and were wrecked. Numbers 9223–9227 went back to Electro-Motive and were sold to the Penn Central by November 1970.
Two SW1200s were leased and then purchased, so they are in the count. Number 2256 had been Milwaukee Road 2043. Number 2272 had been Southern Pacific 2272. Both were retired in June 2011 and traded for the 2140-series gensets.
Six SD20s, 2920–2925, are Illinois Central rebuilds of SD18 and SD24 locomotives. They were leased in the 1990s and purchased in June 2007. Three were retired in 2012 and traded for the 2160-series gensets. Three were retired in 2020 and traded for the GP40-2LW locomotives.
The GP38-2s are five. Numbers 3801 and 3802 arrived in 1995. Numbers 3800, 5627, and 5629 arrived in 2021. Number 3800, serial 72627-27, was built in February 1973 as Penn Central 8066. It was rebuilt in August 2018 with a low short hood, upgraded to Dash-3 standards, and wears a Salute Our Troops scheme. The two SD38-2s, 3861 and 3862, are rebuilt SD40-2s, delivered in 2001. Number 3862 was retired in December 2012 and traded for the 2160-series gensets.
Thirteen GP40-2 and GP40-2LW locomotives complete the road fleet. Ten, 4010–4019, are former Southern Pacific engines remanufactured by GE in Mexico and delivered in 2002 and 2003. They had passed to the Union Pacific in 1996. Number 4010 had been Southern Pacific 3197, renumbered 7600, the Southern Pacific bicentennial unit. Number 4015 was wrecked and left the roster in 2020. Numbers 4020–4022 are wide-cab GP40-2LW locomotives, acquired in 2020, rebuilt by Metro East Industries, and originally Canadian National. They lack dynamic brakes and are paired with slugs 2020–2022.
Four National Railway Equipment 3GS21B locomotives, 2140–2143, were acquired in 2011. Three of them, 2140, 2143, and 2141, were converted to slugs 2020, 2021, and 2022 in 2021. Those slugs are the same three frames. Number 2142 was scrapped in 2021.
Four 3GS21C locomotives, 2160–2163, were acquired in 2012 and purchased new. Each is rated at 2,100 horsepower from three 700-horsepower Cummins engines. Numbers 2160–2162 were built on Southern Pacific SD45T-2 frames, and 2163 was built on a Southern Pacific SD40T-2 frame, all at Mount Vernon, Illinois. They were retired in 2022 and scrapped in 2023.
Serials are build numbers. A later road number is the same frame.
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| NW2 | 8715–8718 | EMD | 6422–6425 | January 1948 | 4 | Phase IV. 8715 became New York Central 8907, second, in April 1966, and later Brandywine Valley 8207. 8717 was wrecked and became slug 478 in February 1975 |
| NW2 | 8719–8728 | EMD | 6219–6228 | May–June 1948 | 10 | Phase IV. 8728 became powered booster PB2 in November 1976 |
| NW2 | 8729–8731 | EMD | 6376–6378 | June–August 1948 | 3 | 8731 became booster BU50 in October 1987 |
| NW2 | 8732–8733 | EMD | 6379–6380 | August–September 1948 | 2 | 8733 returned in July 1968 as an NW2u, Penn Central 9158 |
| NW2 | 8734–8739 | EMD | 6416–6421 | September–October 1948 | 6 | Phase IV. 8735–8737 returned in July 1968 as NW2u locomotives, Penn Central 9159–9161 |
| NW2 | 8740 | EMD | 5038 | July 1947 | 1 | Phase III. Rebuilt from Detroit Terminal 108 in September 1979 |
| NW2 | 8743 | EMD | 5041 | October 1947 | 1 | Phase III. Rebuilt from Detroit Terminal 111 in February 1978. Became booster BU51 in October 1987 |
| NW2 | 8774–8802 | EMD | 7185–7213 | July–September 1949 | 29 | Phase V. 8776 wore 1976. 8777, wrecked in 1960, became slug 477. 8781 became Penn Central 9162. 8793 became Penn Central 9163. 8794–8802 went to the New York Central in 1966 and 1967 |
| NW2 | 8811–8814 | EMD | 9456–9459 | October 1949 | 4 | Phase V. 8811 and 8814 were retired in July 2011 and traded for the 2140-series gensets |
| NW2 | 8815–8834 | EMD | 9461–9480 | December 1949 | 20 | Phase V. 8820 became Penn Central 9164. 8823 became powered booster PB3 in January 1977. 8825 became booster BU54 in April 1988. 8832 was wrecked in August 1958. 8834 was the last NW2 built |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| SW7 | 8835 | EMD | 9460 | October 1949 | 1 | Phase I. Ordered as an NW2. Delivered as an SW7, the first SW7 built |
| SW7 | 8836–8845 | EMD | 8127–8136 | January–February 1950 | 10 | Phase I. 8836–8841 to the Chicago River & Indiana in January 1965. 8842–8845 to the New York Central in October 1967 |
| SW7 | 8846–8850 | EMD | 9446–9450 | February 1950 | 5 | Phase I. To the New York Central in October 1967 |
| SW7 | 8856–8866 | EMD | 9121–9131 | February–March 1950 | 11 | Phase I. 8856 became PB1 in May 1976. 8857 became BU53 in March 1988. 8862 became BU55 about April 1989. 8863 became slug 479 in April 1975 |
| SW7 | 8867–8876 | EMD | 9132–9141 | April 1950 | 10 | Phase II. 8872–8874 to the New York Central in April 1967 |
| SW7 | 8877–8879 | EMD | 9215–9217 | April 1950 | 3 | Phase II. 8879 became BU52 in December 1987 |
| SW9 | 9002–9008 | EMD | 18790–18796 | October 1953 | 7 | Phase II |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| H10-44 | 8904–8905 | Fairbanks-Morse | 10L146–10L147 | June 1949 | 2 | Class DES-14c. 1,000 hp. Renumbered 9104 and 9105 in October 1949, to the New York Central in February 1950, then 8204 and 8205 in 1966. Retired in 1967 and scrapped |
| H20-44 | 7110–7114 | Fairbanks-Morse | 20L18–20L22 | July 1948 | 5 | Class DFT-1b. 2,000 hp. To the New York Central in February 1950 |
| H20-44 | 7115–7116 | Fairbanks-Morse | 20L35–20L36 | September 1948 | 2 | Class DFT-1c. To the New York Central in November 1949 |
| H20-44 | 7117 | Fairbanks-Morse | 20L49 | April 1949 | 1 | Class DFT-1e. To the New York Central in February 1950 |
| H20-44 | 7118 | Fairbanks-Morse | 20L50 | May 1949 | 1 | Class DFT-1e. To the New York Central in February 1950 |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| SW1500 | 9200–9204, 9206–9207 | EMD | 31719–31723, 31725–31726 | June–August 1966 | 7 | Later 1500, 1502, 1506, 1509, 1514, 1515, and 1520. Remanufactured by GE in Mexico, 2003–2005. 1506 became an RP15BDF in 2018. 1514 became an RP15BDF in 2020, paired with 1504. 1500 is paired with PB2. 1520 is paired with PB1 |
| SW1500 | 9205 | EMD | 31724 | — | 1 | Later 1504. Remanufactured by GE in Mexico in 2003. RP15BDF in 2020, paired with 1514 |
| SW1500 | 9208–9215 | EMD | 33078–33085 | March–April 1967 | 8 | Later 1501, 1507, 1508, 1510, 1511, 1512, and 1521. Number 9210 kept its number. 1508 became an RP15BDF in 2018. 9210 was wrecked in February 2002 and scrapped that summer |
| SW1500 | 9222 | EMD | 33543 | November 1967 | 1 | Later 1505. Former EMD demonstrator 109. Remanufactured by GE in Mexico in 2003 |
| SW1500 | 9216–9221 | EMD | 34030–34035 | June–July 1968 | 6 | Later 1503, 1516, 1522, 1523, and 1524. Number 9218 kept its number. 9218 was wrecked in February 2002 and scrapped that summer |
| SW1500 | 9223–9227 | EMD | 36381–36385 | June 1970 | 5 | Returned to EMD and sold to the Penn Central by November 1970. Conrail 9584–9588 in April 1976 |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| SW1200 | 2256 | EMD | 20078 | November 1954 | 1 | Former Milwaukee Road 2043, later 648. Seattle & North Coast 56 in April 1980. Leased in 1995. Purchased in 2008. Retired in June 2011 and traded for the 2140-series gensets |
| SW1200 | 2272 | EMD | 30239 | May 1965 | 1 | Former Southern Pacific 2272. Leased in 1996. Purchased in 2008. Retired in June 2011 and traded for the 2140-series gensets |
| SD20 | 2920 | EMD | 25602 | 1959 | 1 | Rebuilt by the Illinois Central in 1980 from IC 2010. Leased in September 1996. Purchased in June 2007. Retired in 2020 and traded for a GP40-2LW |
| SD20 | 2921 | EMD | 25369 | 1959 | 1 | Rebuilt in 1980 from IC 2017. Leased in September 1996. Purchased in June 2007. Retired in December 2012 and traded for the 2160-series gensets |
| SD20 | 2922 | EMD | 25655 | 1959 | 1 | Rebuilt in 1982 from IC 2027. Leased in December 1997. Purchased in June 2007. Retired in June 2012 and traded for the 2160-series gensets |
| SD20 | 2923 | EMD | 25604 | 1959 | 1 | Rebuilt in 1982 from IC 2031. Leased in December 1997. Purchased in June 2007. Retired in 2020 and traded for a GP40-2LW |
| SD20 | 2924 | EMD | 25669 | 1960 | 1 | Rebuilt in 1982 from IC 2035. Leased in March 1998. Purchased in June 2007. Retired in 2020 and traded for a GP40-2LW |
| SD20 | 2925 | EMD | 25607 | 1959 | 1 | Rebuilt in 1982 from IC 2037. Leased in March 1998. Purchased in June 2007. Retired in June 2012 and traded for the 2160-series gensets |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| GP38-2 | 3800 | EMD | 72627-27 | February 1973 | 1 | Former Norfolk Southern 5274, Conrail and Penn Central 8066. Rebuilt in August 2018 with a low short hood and upgraded to Dash-3 standards. Salute Our Troops scheme. Arrived in 2021 |
| GP38-2 | 3801 | EMD | 72745-10 | August 1973 | 1 | Former Norfolk Southern 5068. Delivered in 1995 |
| GP38-2 | 3802 | EMD | 712953-1 | 1971 | 1 | Former Alto Hornos. Delivered in 1995 |
| GP38-2 | 5627 | EMD | 7368-3 | December 1971 | 1 | Former Norfolk Southern 5627, from 2883, former Conrail 7658, Lehigh Valley 312. Rebuilt in February 2006 from a GP38AC with a low short hood. Arrived in 2021 |
| GP38-2 | 5629 | EMD | 36948 | February 1971 | 1 | Former Norfolk Southern 5629, from 2936, former Conrail and Penn Central 7889. Rebuilt in February 2006 from a GP38 with a low short hood. Arrived in 2021 |
| SD38-2 | 3861 | EMD | 73687-7 | June 1974 | 1 | Former Milwaukee Road 188, Soo Line 6354, GATX 7354. Rebuilt from an SD40-2. Delivered in 2001 |
| SD38-2 | 3862 | EMD | 5803-6 | February 1972 | 1 | Former Burlington Northern 6330. Rebuilt from an SD40-2 in December 1986. Delivered in 2001. Retired in December 2012 and traded for the 2160-series gensets |
| GP40-2 | 4010 | EMD | 74619-01 | November 1974 | 1 | GP40P-2. Former Southern Pacific 3197, renumbered 7600, the bicentennial unit. To the Union Pacific in 1996. Remanufactured by GE in Mexico. Delivered in 2002–2003 |
| GP40-2 | 4011–4015, 4017–4019 | EMD | 776071-16, 776071-18, 776071-13, 776071-09, 776071-04, 776071-10, 776071-08, 776071-02 | February–March 1978 | 8 | Former Southern Pacific 7623, 7625, 7620, 7616, 7611, 7617, 7615, and 7609, in that serial order. To the Union Pacific in 1996. 4012 became UP 1303. 4013 became UP 1305. 4015 was wrecked and left the roster in 2020 |
| GP40-2 | 4016 | EMD | 770671-06 | March 1978 | 1 | Former Southern Pacific 7613. To the Union Pacific in 1996 |
| GP40-2LW | 4020 | EMD | A2981* | 1974 | 1 | Rebuilt in 2020 by Metro East Industries. Former Huron Central 3011, originally Canadian National 9403. Paired with slug 2020. Wide cab. No dynamic brakes |
| GP40-2LW | 4021 | EMD | A3187* | 1975 | 1 | Rebuilt in 2020 by Metro East Industries. Former Railink Canada 3048, originally Canadian National 9552. Paired with slug 2021 |
| GP40-2LW | 4022 | EMD | A3189* | 1975 | 1 | Rebuilt in 2020 by Metro East Industries. Former Southern Ontario 3049, originally Canadian National 9554. Paired with slug 2022 |
| Model | Numbers | Builder | Serial | Built | Qty | Notes |
|---|---|---|---|---|---|---|
| 3GS21B | 2140 | NRE | 058-0212 | 2011 | 1 | Became slug 2020 in 2021. Paired with GP40-2LW 4020 |
| 3GS21B | 2141 | NRE | 058-0211 | 2011 | 1 | Became slug 2022 in 2021. Paired with GP40-2LW 4022 |
| 3GS21B | 2142 | NRE | 058-0210 | 2011 | 1 | Scrapped in 2021 |
| 3GS21B | 2143 | NRE | 058-0198 | 2011 | 1 | Became slug 2021 in 2021. Paired with GP40-2LW 4021 |
| 3GS21C | 2160 | NRE | 2625-10 | June 2012 | 1 | Purchased new. Delivered in June 2012. Scrapped in 2023 |
| 3GS21C | 2161 | NRE | 73630-9 | September 2012 | 1 | Purchased new. Delivered in September 2012. Scrapped in 2023 |
| 3GS21C | 2162 | NRE | 73630-12 | December 2012 | 1 | Purchased new. Delivered in December 2012. Scrapped in 2023 |
| 3GS21C | 2163 | NRE | 786265-6 | November 2012 | 1 | Purchased new. Delivered in November 2012. Scrapped in 2023 |
Slugs, powered boosters, and hump trailers are outside the 202. Where a slug was built from a locomotive already in the table, it is that same frame. Powered boosters PB4 and PB5 came from Illinois Central SW9s. Genset slugs 2020, 2021, and 2022 are 3GS21B locomotives 2140, 2143, and 2141.
| Number | Date | From | Notes |
|---|---|---|---|
| PB1 | May 1976 | SW7 8856 | Powered booster. In service. Paired with 1520 |
| PB2 | November 1976 | NW2 8728 | Powered booster. In service. Paired with 1500 |
| PB3 | January 1977 | NW2 8823 | Powered booster. Stored |
| PB4 | 1981 | Illinois Central SW9 1230, slug IC 59 | To the Harbor about 1995. Sold to LTE in 2005. Birmingham Southern 305 in February 2006 |
| PB5 | 1981 | MSC 209, then Illinois Central SW9 1243, slug IC 55 | To the Harbor about 1995. Sold to LTE in 2005. Birmingham Southern 304 in February 2006 |
| BU50 | October 1987 | NW2 8731 | Booster. Sold to OmniSource in September 2002 |
| BU51 | October 1987 | NW2 8743 | Booster. Sold to OmniSource in September 2002 |
| BU52 | December 1987 | SW7 8879 | Booster. Sold to OmniSource in November 2002 |
| BU53 | March 1988 | SW7 8857 | Booster. Sold to OmniSource in November 2002 |
| BU54 | April 1988 | NW2 8825 | Booster. Sold to OmniSource in September 2002 |
| BU55 | About April 1989 | SW7 8862 | Booster. Sold to OmniSource in September 2002 |
| 473 | August 1950 | New York Central Des-3 542 | Hump trailer, class DHT-2d. Retired in May 1962. Rebuilt in August 1962 as 477 |
| 474 | October 1950 | New York Central Des-3 563 | Hump trailer, class DHT-2d. Retired about 1966 |
| 476 | May 1954 | New York Central Des-3 535 | Hump trailer, class DHT-2d. Retired about 1966 |
| 477 | August 1962 | 473 and NW2 8777 | Hump trailer. Scrapped in 2021 |
| 478 | February 1975 | Wrecked NW2 8717 | Hump trailer. Scrapped in 2021 |
| 479 | April 1975 | SW7 8863 | Hump trailer. Scrapped in 2021 |
| 2020 | 2011, converted 2021 | 3GS21B 2140 | Serial 058-0212. Paired with GP40-2LW 4020 |
| 2021 | 2011, converted 2021 | 3GS21B 2143 | Serial 058-0198. Paired with GP40-2LW 4021 |
| 2022 | 2011, converted 2021 | 3GS21B 2141 | Serial 058-0211. Paired with GP40-2LW 4022 |
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