M62 is a Soviet-built diesel locomotive for heavy freight trains, exported to many Eastern Bloc countries as well as to Cuba, North Korea and Mongolia. Beside the single locomotive M62 also twin versions 2M62 and triple versions 3M62 have been built. A total number of 7164 single sections have been produced, which have been used to build 5231 locomotives.
- 1 History
- 2 Operators
- 3 Technical data
- 4 Nicknames
- 5 See also
- 6 Resources
According to the Comecon directives production of heavy diesel locomotives among Eastern Bloc countries was left exclusively for Romania and the Soviet Union.  The first few prototypes of this heavy freight locomotive were ready in 1964 and their first destination outside the Soviet Union was Hungary. A total number of 723 units were produced in the Soviet Union.
Soviet Union M62
From 1970 till 1976 the former Soviet Union Railway (SZhD) received 723 engines M62, further 13 M62U have been delivered from 1989 till 1990. These engines were single 3M62U sections.
For the Soviet military 154 locomotives named DM62 were built. These engines have been modified for pulling SS-24 Scalpel ballistic rocket launcher trains.
For industrial railroads 39 engines of the version M62UP have been built . These engines had improved trucks, larger fuel tanks and modified exhaust silencers.
In the early 1960s an urgent need appeared in Poland for a heavy freight diesel locomotive. The Polish industry at the time was not able to produce such a locomotive, so a decision was made to import a large number of M62 locomotives from the Soviet Union, which were already imported by Hungarian MÁV. In Poland those machines received ST44 designation During first-revision repairs all locomotives had front lights changed from small ones into standard, Polish large types. The decision is said to have been made after Poland had started to import ST43 locomotives from Romania and was probably influenced directly from the Soviet Union. For political reasons, the USSR simply forced Poland to buy Soviet instead of Romanian locomotives, as it preferred satellite countries not to export their products.  The first 4 locomotives, produced by the Voroshilovgrad Locomotive Factory (in today's Lugansk, Ukraine), were delivered to Poland in September 1965. Deliveries continued until 1988, with 1,191 locomotives delivered in total (1,114 for PKP, 68 for LHS and 9 for industry). One of the locomotives (ST44-1500 – producer’s designation M63) had bogies and traction engines exchanged with newer types which allowed it to achieve a higher top speed. The series, with numbers between 2001 and 2068 was imported to run on the LHS broad gauge line. In addition to a different gauge, this series was equipped with an automatic coupling system.
There were several reasons for importing M62 locomotives to Poland, and today’s views on this decision are quite ambiguous. The locomotive was more powerful than even the strongest of the Polish steam locomotives used for freight transport in those days, yet it could not haul passenger trains (due to lack of carriage heating devices) and caused huge damage to the railway tracks. Another important weakness of the M62 locomotive was with its vast fuel consumption. The advantages of this machine though are a fairly simple construction coupled with a largely reliable diesel-electric transmission. Intensive electrification of Polish railways caused the relatively new ST44 locomotives to be mothballed into reserve stock. Many machines withdrawn from PKP found their place among industrial and private railways, where they only bore the producer’s M62 designation 
Heavy fuel and oil consumption as well as heavy wear caused to the tracks has resulted in Polish State Railways reducing the use of the class. In 2007 many of them still remain in service with PKP for freight use, although most of them have now been stored. Some routes (e.g. Gdynia - Hel line) forbid the running of the ST44 class because this class's excessive weight causes serious damage to lighter built Trackwork.
The locomotives that are still in use in large numbers, are owned and operated by private railroad companies, as well as the LHS broad gauge lines.  Today around 50 of the class are located at Zamość Engine Shed, and it has been decided to mothball them for the moment.
In 2005, two ST44 locomotives were completely rebuilt by Bumar-Fablok S.A. and delivered to the LHS line. Changes made included new Caterpillar 3516B HD Diesel Engines and Primary Alternators. These locomotives were designated as 3001 and 3002.
North Korea K62
Because of its low maintenance requirements M62 locomotive is quite popular with the Korean State Railway of the Democratic People's Republic of Korea (Chosŏn Minjujuŭi Inmin Konghwaguk-ŭi Ch'ŏldosŏng), where they serve not only on non-electrified lines but on electrified ones as well. 64 locomotives of this type were imported from the Soviet Union and Russian Federation between 1967 and 1995, numbered in the 내연6xx (Naeyŏn 6xx) series.
Between the years 1996 and 1998 31 locomotives were delivered from Deutsche Bahn. In 2000 six units were delivered from Slovakian Railways and 13 units from Polish State Railways. None of the delivered locomotives was painted in standard North Korean livery (which is light blue over green) and they still bear the same livery as in previous service, except the former German ones, which were given a different, green livery. Those units acquired from Germany are numbered in the 내연7xx (Naeyŏn 7xx) series, while those acquired from Poland and Slovakia are numbered in the 내연8xx (Naeyŏn 8xx) series.
Two copies were built in North Korea, numbers 8001 and 8002, and given the designation “Kŭmsŏng” (“Venus”). 8002 has been on display at the Museum of the Three Revolutions since its construction, while 8001 is in regular service.
At least 15 North Korean M62 locomotives were converted to electric locomotives by Kim Chŏng-tae Electric Locomotive Works in 1998. This is presumed to be quite easy, as the overhead voltage in North Korea is 3000 V. Numbered 1.5-01 to 1.5-15, these are known as the Kanghaenggun-class (강행군, "Arduous March").
Germany BR 120
A total of 396 locomotives was sent to East Germany between 1966 and 1978, most of which ended up at the Deutsche Reichsbahn with some being delivered to East German industry. The Reichsbahn used the M62 locomotives at first under the designation V 200, while later reclassifying those units as BR 120.
After the reunification of Germany and subsequent merger of the Deutsche Reichsbahn into the Bundesbahn the class designation was changed to BR 220 for the Deutsche Bundesbahn, as the original class number was already in use for the electric BR 120, and class designation ranges 100-199 were reserved for electric locomotives under the Bundesbahn's scheme. However, they were quickly phased out and by the end of 1994 the class had all but disappeared, with 31 units from Germany having been sold to North Korea.
Czechoslovakia and the Czech Republic class 781
Between 1966 and 1979 a total of 599 locomotives was imported into Czechoslovakia where at first they were given a T679.1 designation for standard-gauge locomotives and T679.5 for broad-gauge machines. Later those numbers were changed to 781 and 781.8 respectively. Those machines were working in the Czech Republic and Slovakia until 2002.
From 1965 till 1978 the Hungarian State Railways MÁV received 294 locomotives named M62. The M62 001 was actually the first M62 ever built, and is still running.
A program to replace the original, very outdated two-stroke Kolomna 14D40 power plants with a modern, more efficient engine was started in 1997, with the first locomotive, M62 301 debuting in early 2001. M62 301, 303 and 304 received MTU, the rest Caterpillar power plants. The program also included a thorough overhaul of the locomotives, including fitting better equipment for the driver, air conditioner, improved electric system etc. The 34 remotorized locomotives (M62 301-335) have been renamed M62.3 and received the nicknames "Remot-Szergej" for remotorized Szergej, "Csendes" meaning quiet, as well as "Csörgős" because of the rattling sound made by the engine.
Between 1970 and 1978, MÁV purchased 15 locomotives M62.5 with bogies for the Russian 1,524 mm (5 ft) broad gauge. Three more M62.5 have been rebuilt from standard gauge M62. The broad-gauge engines are used for operation near Zahony in the border region of the former Soviet Union (now Ukraine). In 2005 still seven M62.5 have been in use.
1972 also the Raab-Oedenburg-Ebenfurther Eisenbahn (Győr-Sopron-Ebenfurti Vasút, GySEV), an Austro-Hungarian joint venture, received six standard-gauge locomotives named M62.9. The locomotives were stationed in Sopron but were scrapped in 1996.
Cuba class M-62K
Twenty locomotives, named M-62K class were shipped to Cuba between 1974 and 1975 and subsequently used by the Ferrocarriles de Cuba. The "K" designation comes after the Russian spelling of the name Cuba, "Куба".)
Though most of these machines are no longer in service on the island, one of them, numbered 61602 is on display at the National Railroad Museum in Havana. This one was driven by Fidel Castro on the inauguration of a tram between Cumbre and Placetas in the center of the country. Other surviving M-62Ks have been spotted in the central city of Cienfuegos; these are numbered 61611 and 61605. (See photo here:)
The M62 locomotive has a Co-Co wheel arrangement, running on two bogies with three axles on each bogie. Chassis and bogie frames are constructed out of box elements. The two-stroke diesel engine and the main alternator are mounted on a steel frame. The frame is fixed to the chassis with elastic supports. Electric traction motors are mounted on bogie frames with a tram system. M62 is equipped with electro-pneumatic multiple-unit controls; therefore it is possible to drive two locomotives from one cab. The locomotive had enough power to pull a 1,000 t (980 long tons; 1,100 short tons) freight train with a top speed of 80 km/h (50 mph) (on level track), while two coupled locomotives are able to pull trains up to 3,600 t (3,500 long tons; 4,000 short tons). The top speed in such a case was 60–100 km/h (37–62 mph).
Comparison with M61
In Hungarian service, the M62 proved inferior to the Swedish-American NOHAB M61, which, while 10 tons lighter and slightly less powerful, could haul 25% more weight with 50-60% of the Soviet engine's fuel consumption. The M62 was unable to run from Budapest to Nyíregyháza and back without refuelling, which led to congestion and timetable problems when the NOHAB was replaced by the M62 on that route.
The M62's 14D40 V diesel engine had substandard reliability because it was developed in a short timeframe from scratch, without previous design experience. In the 1950s domestically built Soviet diesel locomotives, having the wider 1,520 mm (4 ft 11 27⁄32 in) track base and taller tunnel clearances, used vertical opposed-piston engines. These (f.e. Kharkov 2D100/9D100/10D100) were based on the Fairbanks-Morse 38D8 design which, when used for locomotives, was installed by F-M in their H20-44 Hood road switcher locomotive, as well as the F-M 'Erie-Built' Passenger and Freight cab unit. The Soviet opposed-piston engines, like their US counterparts, were simply too tall to fit in locomotives designed for the 1,435 mm (4 ft 8 1⁄2 in) standard-gauge railways with the tighter tunnel allowances of Eastern Bloc satellite countries. After the fall of the Soviet Bloc, 31 units of MÁV's M62 fleet were rebuilt with Caterpillar engines in the 1990s, but lack of funds stopped further upgrades.
No train heating
The M62 was a dedicated freight mover and lacked any central heating apparatus for coaches, even though most Soviet satellite-state customers needed to use them in dual cargo/passenger role regularly (Soviet trains of the era were heated with individual per-coach drum fireplaces). In cold times a dedicated heating wagon had to be added to MÁV's M62-drawn trains, producing steam from oil-fired boilers (1960-70s era), later on generating electricity for resistor-based heating (1980s era). This proved to be a high-cost solution, in contrast to the M61 NOHAB, which could produce 750 kg of steam per hour using an internal water tank and engine waste heat, with minimal effects on fuel consumption.
- Gagarin in Poland - from the space flight pioneer
- Iwan/Ivan or Siergiej/Sergej in Poland or Czechoslovakia - from two popular Russian names
- Szergej in Hungary – from a popular Russian name
- Taigatrommel (Taiga Drum) in Germany – from the amount of noise and vibration the locomotive produced.
- Stalin's last revenge in Germany - for the same reason.
- Mukha (Russian: Муха = fly) in Belarus.
- Sinsŏng (Korean: 신성 = Nova) in North Korea.
- In the Soviet Union the locomotive had one widespread nickname — Mashka (Russian: Машка) (diminutive of Maria, a reference to the "M" designation).
- The Museum of the Moscow Railway, at Paveletsky Rail Terminal, Moscow
- Rizhsky Rail Terminal, Moscow, Home of the Moscow Railway Museum
- Varshavsky Rail Terminal, Saint Petersburg, Home of the Central Museum of Railway Transport, Russian Federation
- History of rail transport in Russia
- Tomasz Galka. "Standard-Gauge Locomotives in Poland". Retrieved 2009-05-16.
- Jakub Halor (1999–2004). "Strony modeli kolejowych w skali H0". Retrieved 2007-08-02.
- Michał Rudnicki & Jacek Eychler (2003). "www.transport.rar.pl". Retrieved 2007-08-02.
- Wojciech Cupiał. "Lokomotywa spalinowa serii ST44". Archived from the original on 2007-03-31. Retrieved 2007-08-02.
- Janusz Mróz. "LHS Sławków". Retrieved 2007-08-02.
- "Zmodernizowana lokomtywa serii ST44". Bumar-Fablok. Retrieved 2007-08-02.
- Kokubu, Hayato, 将軍様の鉄道 (Shōgun-sama no Tetsudō), ISBN 978-4-10-303731-6
- "Taiga Drums in North Korea". Retrieved 2007-08-02.
- "K means Cuba in Russian (Kyba)" (in Spanish).
- "An M-62K in Cienfuegos Cuba" (in Spanish).
- "PJSC Kolomensky Zavod - About the company - History - 1945-1959 -". PJSC Kolomensky Zavod. Retrieved 2013-08-13.
- Locomotive Panorama Volume II. E.S. Cox. Ian Allan Publishing 1966 (Paperback Edition 1974). Pages 68 to 73 inclusive deal with Mr. Cox's visit to the Soviet Union.
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