Plymouth built is first diesel in 1927, and it has been the country's most prolific small gas and diesel locomotive builder, with 7500 to date. Most of these are small mine and industrial locomotives of less than 25 tons. They are noted for their torque-converter locomotives, and almost all later production uses that type of transmission.⁽¹⁾

Plymouth is about 55 miles sw of Cleveland on the ex-B&O Sandusky - Mansfield line (Ashland RR operates this portion today).Also crossing the B&O just behind the shops is the Wheeling & Lake Erie (ex-Akron Canton & Youngstown RR). Most of the units were shipped out of here on the B&O. 1987 Gary Morris
Heckert Const. Co. Ply MTD 35T #7459, Pittsburg KS 2004, ex 3M Little Rock AR , blt 1986 w/335 Cummins Chuck Heckert	Heckert Const. Co. Ply MTD 35T #7459, Pittsburg KS 2004, ex 3M Little Rock AR , blt 1986 w/335 Cummins Chuck Heckert	Fiber Ind Ply MDT 40T, Darlington SC 1979, blt 1973 © Mac Connery - GS	Westinghouse Plymouth MDT 40T Cat D-343-T 6 cyl 335 HP, blt 1962, Pensacola FL John Albright
Midwest Old Threshers Ply MDT 40T #14, Mount Pleasant, IA 2004 Maurice D. Lantz	Westinghouse Plymouth MDT 40T Cat D-343-T 6 cyl 335 HP, blt 1962, Pensacola FL John Albright	WWC Plymouth 40T MDT #01	Anderson Grain MDT 40T #9114.01, Maumee OH 1972 Ken Houghton
Anderson Grain MDT 40T #9116.01, Maumee OH 1972 Ken Houghton	The Andersons Ply MDT 40T #9002.10, Maumee, OH Wade H. Massie	The Andersons Ply MDT 40T #9024.15, Maumee, OH Wade H. Massie	Minn Mining Ply MDT 40T? , Little Rock AR 1985 Matt Ritchie
Balden(Borden?) Chemical Ply MDT 40T #51 , Pineypoint, FL 1978, (cn6481, blt 1966 ??)	Babcock & Wilcox Ply MDT 40T , Welland Ont 2008, blt 1953 cn5691, Ex Penvidic Contracting 1435 nee HEPC Ken Jones	Babcock & Wilcox Ply MDT 40T , Welland Ont 2008, blt 1953 cn5691, Ex Penvidic Contracting 1435 nee HEPC Ken Jones	Con Agra Ply MDT 40T, Alton, IL 2005, blt 1959 cn6164, ex Peavy Grain, nee Winston-Green-Drake Brian Frierdich
Ply WDT/K-B 40T, PLW 1986 Howard W. Ameling	Ply WDT/K-B 40T, PLW 1986 Howard W. Ameling	MEAD Ply WDT/K-B 40T #105, Lynchburg, VA 1977	TeleRR Ply WL 35-40T NG #402 Honduras 1985 Copyright 1994 Corel Corp
Transi Tank Ply WL , Camden AR 1985 Matt Ritchie	Wyandot Dolomite Ply WDT 40T #59 , Carey OH 1995, blt 1952 cn 5590, ex PA Glass Sand Gordon Strathdee	Penna Glass Sand Ply WDT 40T, Phalanx OH 1971, to Wyandot Dolomite #59 at Carey, OH, blt 1952 cn5590 Steve Timko	Virginia Central RR Ply WL #200, Fredricksburg VA 1975 Ken Houghton
Louisville Scrap Material Ply WDT 40T, Louisville, KY 2001 Jay Ramsey	Prattsbugh Ply WL #5 , NY Phil Soyring	Ply MHD[hydrostatic drive] 40T#7161, PLW 1986, blt 1979 cn7161 Howard W. Ameling	Bechtel Kumigai Ply TMDT 40T #27-02, Cummins NRT-6B1, 56 1/2", blt 1958
Blanchard Valley Grain Farmers Co-OP Ply 45T MDT, Findlay OH 1994 cn6270, blt 1961, ex Hochstetlers Grain, exx Indiana Grain Co-OP Sam Sponseller	West Central Co-Op Ply 45T MDT, Boone IA 1983, blt 1979 cn7281 Glen Beans© Kevin Piper	Capital Cement Ply 45T MDT, Martinsburg WV 1994 blt 1970 cn6756	Foster Forbes Glass Ply 45T MDT#5, Millville NJ 2005, blt 1968 cn6618, ex National Glass, exx Kerr Glass, nee Armstrong Cork Hector Vazquez
France Stone Plymouth 40T #100, 1962 George Elwood	Schnitzer Steel Ply 45T DE #145-17[1547], Portland, OR 1982 blt 1945 cn4786 , ex American Ship Dismantlers #1,nee USN[#12] #65-00208 Keith Ardinger-Rob Jacox	Walton Agri Service Plymouth DE 50T #25, Upper Sandusky OH 2001, ex Marble Cliff Quaries OH, nee USN65-00144, cn4416 blt1942 Arnold Morscher	Plymouth DE 50T, Willard OH Tom Boylan
Ag Processing Ply DE 50T , Hastings.NE 2003 Glen Beans	Plymouth DE50 , Plymouth Locomotive Works 1987 Gary Morris	Plymouth 50T XLG gas	Plymouth 60T XL diesel #3001
Ohio Edison Plymouth DE 8-Wheel chain-drive Traction Dick Tinder	Ohio Edison Plymouth DE Wheels	Ply DE 50T? , Bridgeville PA 2005 Ken Caine	Cassville & Exeter Ply WE 65T #2001, Dodson MO 1960, nee Joplin-Pittsburg RR 2001, sold to Kansas City Public Service Freight, blt 1932 Don Ross
Inland Steel Ply KC Flexomotive 65T #49, Cooper-Bessemer EN eng	Morse & Ory Plymouth Flexomotive 70T(KC70) #58 , Amite LA 1970, ex Inland Steel 58, blt 1941 cn 4093 Joe Brockmeyer	Consumers Co, IL Plymouth 6-wh Flexmobile 70T 6-wh #106-6, Cary, Il Don Ross	Lowville & Beaver River Ply CR-4 60T #3 Shawn Noe
Mount Union Connecting RR Ply CR-4 , blt 1960 cn6216, ex Minerals Equip. (D), exx Jones & Laughlin #3 Bill Adams	Mount Union Connecting RR Ply CR-4 , blt 1960 cn6216, ex Minerals Equip. (D), exx Jones & Laughlin #3 Bill Adams	Kaiser Sand & Gravel Ply CR-8 , Permanente CA, cn6703 1969 Steve Hoskins	Martin-Marietta, Std Lime, Plymouth CR-8 65T #47-0050, blt 1981, Woodville OH Tom Boylan
Milwaukee Sewage Comm Plymouth CR-8 Don Ross	USA Plymouth CR-8 400hp (only 20 made) #1993 Larry Faulkmen	San Francsco Bay Area Rapid Transit Ply CR-8 #3, 2004 Jeff	MBTA Ply CR-8 #04443, South Boston MA 2005 Jack Clifford
Jones & Laughlin Steel Ply CR-8XT #38, Aliquippa, PA 1979 Ken Houghton	Bethlehem Steel Ply 100T NG #30 , Lackawanna NY 1984 Doug Kroll	Bethlehem Steel Ply? #29-B, Bethlehem, PA 1984 Ken Houghton	Joplin Pittsburg Ply GE70T #2003, Museum of Trans 2002 Steve Barker