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Classic Streamliners - TRAIN​CYCLOPEDIA

An HH Series Slideshow.

New Haven No. 0900, an Alco 600 in 1933.
A 6-cylinder McIntosh & Seymour engine on a flat car at the Cass Mountain Scenic Railway.

Portland Terminal Company HH600 No. 1004, photographed at Portland, Maine in 1968.

By Thewellman at en.wikipedia - Transferred from en.wikipedia to Commons by User:glorioussandwich., Public Domain, https://commons.wikimedia.org/w/index.php?curid=17145801

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Portland Terminal Company HH600 No. 1004, photographed at Portland, Maine in 1968.

A 6-cylinder McIntosh & Seymour engine on a flat car at the Cass Mountain Scenic Railway.

By Hallcp - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10874356

ALCO HH Series Diesel-Electric Locomotives
The ALCO HH series were an early series of switcher diesel-electric locomotives built by the American Locomotive Company (ALCO) of Schenectady, New York between 1931 and 1940, when they were replaced by the S series; the 660 hp (490 kW) S-1 and 1,000 hp (750 kW) S-2. They were ALCO's first diesel switchers to enter true series production, and among the very first land vehicles anywhere to utilize the revolutionary diesel-electric power transmission.

The "HH" name stood for "High Hood", a name ALCO came eventually to use in an official context, but originally an unofficial name. Model designations such as HH600 are only semi-official. Original ALCO designations were either descriptive or based on the internal order/design number.

A total of 177 of the HH series were produced; this comprised one prototype and four production models of varying power outputs.

ALCO 600 (New Haven No. 0900)
The first HH series locomotive, ALCO demonstrator No. 600 was mechanically almost identical to the others, but the appearance differed. The sides of the locomotive's hood sloped outward from top to bottom, and brake equipment was exposed beneath the cab. After a period of demonstration on a number of railroads, the unit was sold to the New York, New Haven and Hartford Railroad who numbered it as 0900, this number often being used to describe the locomotive, although the classification on the builder's data card was "404-OE-200". It rode on a unique pattern of trucks. This first unit was built in July 1931.

Diesel-electric power transmission
The locomotive was equipped with a four-stroke McIntosh & Seymour 531 straight-6 diesel engine, powering a General Electric GT551A1 main generator. Four nose-suspended GE-287-D traction motors in the trucks were geared at a ratio of 4.25:1 to the wheels; the motors were cooled by electrically driven traction motor blowers. The New Haven's Alco 600 in 1933.

HH600
The HH600 was nearly identical to the previous No. 0900 of the New Haven internally and mechanically, but it was clad in new bodywork, with a straight-sided hood and cab sides that came all the way to the frame. The HH600 was powered by a 6-cylinder McIntosh & Seymour 531 engine of 600 hp (450 kW), and was built from July 1932 through May 1939; in all, 78 HH600s were constructed. The first-built units had sharp-edged front hood corners, but in 1934 ALCO employed industrial designer Otto Kuhler to clean up the appearance; he curved the corners and recessed the headlight, and all subsequent HH series units were of this style until another restyling in 1938 where the nose was further rounded. Late versions of this locomotive used the 6-cylinder 538 engine.

Original buyers

Quantity:  Road number(s):  Notes:  

American Locomotive Company (prototype)
Quantity:  1
Road number(s):  600 (1st)
Notes:  to New Haven 0900.

American Locomotive Company (demonstrators)
Quantity:  5
Road number(s):  1, 600 (2nd), 601, 602, 603
Notes:  1 to ATSF 2300, 601 to Lehigh Valley Railroad 105, 602 to Boston and Maine 1102, 603 to Delaware, Lackawanna and Western 401.

Atchison, Topeka and Santa Fe Railway
Quantity:  2
Road number(s):  2301–2302
Notes:  2301 retired Feb 1, 1971 Relocated to Temple, TX. 2302 to American Grain & Cattle.

Belt Railway of Chicago
Quantity:  2
Road number(s):  302–303

Boston and Maine Railroad
Quantity:  1
Road number(s):  1101

Central Railroad of New Jersey
Quantity:  4
Road number(s):  1020–1023
Notes:  1021 to Houdaille Construction Co.

Chicago and Eastern Illinois Railroad
Quantity:  1
Road number(s):  102

Chicago and Illinois Western Railroad
Quantity:  1
Road number(s):  1

Chicago and Western Indiana Railroad
Quantity:  1
Road number(s):  1

Delaware, Lackawanna and Western Railroad
Quantity:  7
Road number(s):  402–408
Notes:  405–406 to Erie Lackawanna as 322-323

Elgin, Joliet and Eastern Railway
Quantity:  1
Road number(s):  209

Hoboken Manufacturers Railroad
Quantity:  1
Road number(s):  601

Illinois Central Railroad
Quantity:  8
Road number(s):  9006–9013
Notes:  Scrapped 1951.

Massena Terminal Railroad
Quantity:  1
Road number(s):  7

Michigan Limestone and Chemical Company
Quantity:  2
Road number(s):  101–102

New York Central Railroad
Quantity:  6
Road number(s):  614–619
Notes:  Renumbered 800–805.

New York Central (Boston and Albany Railroad)
Quantity:  5
Road number(s):  680–684
Notes:  Renumbered 806–810.

New York, New Haven and Hartford Railroad
Quantity:  10
Road number(s):  0911–0920

Patapsco and Back Rivers Railroad
Quantity:  7
Road number(s):  54–60

Peoria and Pekin Union Railway
Quantity:  1
Road number(s):  100

Portland Terminal Company (Maine)
Quantity:  4
Road number(s):  1001–1004

South Buffalo Railway
Quantity:  6
Road number(s):  54–59

Steelton and Highspire Railroad
Quantity:  1
Road number(s):  31

Universal Atlas Cement
Quantity:  1
Road number(s):  4

Total Quantity:  79

HH900
The HH900 was a 900 hp (670 kW) version of the HH series using a turbocharged version of the McIntosh & Seymour 531 engine. Both turbocharged models (HH900 and HH1000) needed a greater cooling capacity, and this was reflected in the larger bodyside radiator space of both models, which distinguishes them from the lower-powered HH600 and HH660. The 21 HH900 units were produced between March 1937 and January 1939, after which it was replaced by the McIntosh & Seymour 538T-engined HH1000. Several HH900s were built with the 538T engine.

Original buyers

American Locomotive Company (demonstrator unit)
Quantity:  1
Road number(s):  101
Notes:  to CRI&P 730.

Birmingham Southern Railroad
Quantity:  8
Road number(s):  81–88

Elgin, Joliet and Eastern Railway
Quantity:  1
Road number(s):  402

Kansas City Terminal Railway
Quantity:  1
Road number(s):  50

Minnesota Transfer Railway
Quantity:  3
Road number(s):  90–92

Philadelphia, Bethlehem and New England Railroad
Quantity:  1
Road number(s):  207
Notes:  to South Buffalo Railway 70.

Reading Company
Quantity:  2
Road number(s):  40–41

Warrior River Terminal Company
Quantity:  2
Road number(s):  50–51

Youngstown and Northern Railroad
Quantity:  2
Road number(s):  211–212

Total Quantity:  21

HH660
The HH660 started production in ALCO's lineup in October 1938; 43 examples were built until April 1940. It utilized a naturally aspirated version of the 6-cylinder McIntosh and Seymour 538 engine, producing 660 hp (490 kW). Externally, HH660s are indistinguishable from late HH600s.

Original buyers

American Locomotive Company (plant switcher)
Quantity:  1
Road number(s):  4

Atlantic Coast Line Railroad
Quantity:  1
Road number(s):  1900

Boston and Maine Railroad
Quantity:  1
Road number(s):  1162

Buffalo Creek Railroad
Quantity:  1
Road number(s):  43
Notes:  to Relco.

Chicago, Milwaukee, St. Paul and Pacific Railroad (“Milwaukee Road”)
Quantity:  4
Road number(s):  1600–1603
Notes:  Renumbered 980–983. 980-981 to Relco. 982 in Scottsdale, AZ. 983 to III Transportation then Illinois Railway Museum.

Delaware, Lackawanna and Western Railroad
Quantity:  3
Road number(s):  409–411
Notes:  409–410 to Erie-Lackawanna Railway 324–325.

Elgin, Joliet and Eastern Railway
Quantity:  3
Road number(s):  210–212
Notes:  211 to Gopher State Scrap and Metal.

Erie Railroad
Quantity:  4
Road number(s):  302–305
Notes:  305 to Erie-Lackawanna Railway.

Green Bay and Western Railroad
Quantity:  1
Road number(s):  101

Inland Steel
Quantity:  1
Road number(s):  50

Louisville and Nashville Railroad
Quantity:  1
Road number(s):  10

Maine Central Railroad
Quantity:  2
Road number(s):  951–952

Minneapolis and St. Louis Railway
Quantity:  1
Road number(s):  D939
Notes:  to Glacier Sand & Gravel.

New York, New Haven and Hartford Railroad
Quantity:  10
Road number(s):  0921–0930

Northern Pacific Railway
Quantity:  3
Road number(s):  125–127
Notes:  125–126 to Walla Walla Valley Railway 770, 775; 127 renumbered 602. 770 to Relco. 770 to Port of Longview 770 Longview, WA.

Southern Pacific Company
Quantity:  3
Road number(s):  1001–1003

Tennessee Central Railway
Quantity:  1
Road number(s):  50

Wabash Railroad
Quantity:  2
Road number(s):  100, 150

Total Quantity:  43

HH1000
The HH1000 replaced the HH900, replacing the 531 engine with the new McIntosh and Seymour 538T engine, turbocharged to produce 1000 hp (750 kW), a 100 hp (75 kW) increase on the previous model. It was produced during May 1939 and December 1940; 34 were built. M&STL D539 was the only HH1000 built with the 531T engine.

Original buyers

American Locomotive Company (Demonstrator Unit)
Quantity:  1
Road number(s):  1000

Atchison, Topeka and Santa Fe Railway
Quantity:  12
Road number(s):  2310–2321

Atlantic Coast Line Railroad
Quantity:  1
Road number(s):  600

Birmingham Southern Railroad
Quantity:  1
Road number(s):  89

Chicago, Milwaukee, St. Paul and Pacific Railroad (“Milwaukee Road”)
Quantity:  1
Road number(s):  1671

Manufacturers Railway
Quantity:  3
Road number(s):  202–203

Michigan Limestone and Chemical Company
Quantity:  4
Road number(s):  103–106

Minneapolis and St. Louis Railway
Quantity:  1
Road number(s):  D-539
Notes:  Renumbered 92; to Chicago and North Western Railway.

Missouri Pacific Railroad
Quantity:  1
Road number(s):  9102

Newburgh and South Shore Railway
Quantity:  2
Road number(s):  1–2

Oliver Iron Mining Company
Quantity:  7
Road number(s):  900–906

Total Quantity:  34

Surviving units
A few HH series switchers still survive in revenue service, and more are in museums. Working HH locomotives include an HH660 at Gopher Scrap in Mankato, Minnesota, two more owned by RELCO, and one owned by Behr Iron and Steel of Portage, Indiana. Preserved locomotives include an HH600, four HH660s, an HH900 and an HH1000.

ALCO HH Series Overview
Type and origin
Power type: Diesel-electric
Builder ALCO
Total produced HH600: 79
Total produced HH660: 43 
Total produced HH900: 21
Total produced HH1000: 34
Specifications
Configuration:
​ • AAR B-B
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge

Overall length: 45 ft 2.75 in 13.79 m
Between bolster centers: 21 ft 3 in 6.48 m
Truck wheelbase: 8 ft 0 in 2.44 m
Width over grab irons: 9 ft 10 in 3.00 m
Height above rails: 14 ft 3 in 4.34 m
Wheel diameter: 40 in 1.02 m
Prime mover HH600/900: McIntosh & Seymour 531
Prime mover HH660/1000: McIntosh & Seymour 538
Engine type: Inline-6 Four stroke engine diesel
Aspiration HH600/660: Naturally aspirated
Aspiration HH900/1000: Turbocharged
Displacement: 9,572 cu in (156.86 L)
Cylinders: 6
Cylinder size: 12.5 in × 13 in (318 mm × 330 mm)
Performance figures
Power output: 600 hp (447 kW)
Power output: 660 hp (492 kW)
Power output: 900 hp (671 kW)
Power output: 1,000 hp (746 kW)

See also:

Alco Diesel Locomotives

Diesel Locomotives

American Locomotive Company

Locomotives

Alco logo

New Haven No. 0900, an Alco 600 in 1933.