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The Class 912 Shinkansen was a diesel-hydraulic locomotive operated by the Japanese National Railways and later the West Japan Railway Company from 1963 to 2011.

History[]

The Class 912 was a type of locomotive used for maintenance-of-way operations on the Shinkansen network. Between 1963 to 1977, twenty DD13 locomotives were modified by JNR, with the locomotives regauged to standard gauge for the purpose. The locomotives were split into two subseries; the 912-0 and 912-60 subseries, the latter being compatible with multiple general control systems as well as specially modified for use in the Kanmon Tunnel. All locomotives were withdrawn by 2011.

No complete Class 912 locomotives have been preserved; only the front end of 912-64 is preserved at the Kyoto Railway Museum.

Design[]

The Class 912 featured a steeplecab-like design, giving it an appearance similar to that of a switcher locomotive; this design was chosen to help the locomotive reduce its weight by reducing its axle load.

The couplers are attached to a U-shaped frame on their front pilots which is lowered when the locomotive needs to couple to something.

Specifications[]

The Class 912s were fitted with two V12 prime movers, designated the DMF31S. From 1961, all DD13s manufactured (DD13 111 onwards) would use the DMF31SB prime mover, equipped with a turbocharger. Total output was about 1,000 PS (736 kW). Total power output is about 2,200 PS (1,600 kW). The Class 912 used a Shinko DS1.2/1.35 hydraulic transmission; the transmission works similarly to a Lysholm-Smith hydraulic torque converter and features two speeds and a single direct gear.

Preservation[]

The following Class 912 locomotives have been preserved:

Number Manufacturer Date manufactured Date retired Location Notes
912-64 Nippon Sharyo 14 March 1967 2011 Kyoto Railway Museum, Kyoto, Japan Ex-DD13 629, last Class 912 converted; front portion only
JR Group motive power
JNR Diesel prototype DB10DC10DC11DD10
4-axle diesel DD11DD12DD13DD14DD15DD16DD17DD20DD21DD40DD41DD42DD50DD51DD53DD54DD90DD91DD92DD93
5-axle diesel DE10DE11DE15DE50
6-axle diesel DF40DF41DF50DF90DF91 (gen 1)DF91 (gen 2)DF92DF93
Shinkansen 911912
Narrow-gauge diesel Ke DB10Ke DB11
Early 2/4-axle freight electric AB10EB10ED10ED11ED12ED13ED14ED15ED16ED17ED18 (gen 1)ED18 (gen 2)ED19ED23ED24
Early 4-axle passenger electric ED50ED51ED52ED53ED54ED55ED56ED57
Early 6-axle freight electric EF10EF11EF12EF13EF14EF15EF16EF18
Early 6-axle passenger electric EF20EF50EF51EF52EF53EF54EF55EF56EF57EF58EF59HEF10HEF50
Early 8-axle electric EH10EH50HEH50HEH150
Early Abt rack rail electric EC40ED40ED41ED42
Acquired from private railways ED20ED21ED22ED25 (gen 1)ED25 (gen 2)ED26 (gen 1)ED26 (gen 2)ED27 (gen 1)ED27 (gen 2)ED28 (gen 1)ED28 (gen 2)ED29 (gen 1)ED29 (gen 2)ED30 (gen 1)ED31ED32ED33ED34ED35ED36ED37ED38Ke ED10DeKi 1RoKo 1DeKi 501RoKo 1000
DC 4-axle ED60ED61ED62ED63ED95
AC 4-axle ED44ED45ED70ED71ED72ED73ED74ED75ED76ED77ED78ED79ED90ED91ED93ED94
DC 6-axle EF60EF61EF62EF63EF64EF65EF66EF67EF90
AC 6-axle EF70EF71
Dual-current ED30 (gen 2)ED46ED92EF30EF80EF81
Other AH100
JR Group Dual-current electric ED500EF500EF510EH500
DC electric EF200EF210EH200
DC EMU M250
AC electric EH800
Diesel DD18DD19DB500DD200DF200ENR-1000
Hybrid HD300
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