The SNCF Class BB 66600 is a small class of centre cab diesel locomotives rebuilt from the earlier Class BB 66000 by fitting a slightly more powerful engine. The locomotives were long and weighed . Powered by an SEMT 12PA4 diesel engine developing , they had a maximum speed of . All members of the class were fitted for multiple working and all but two had electric train heating.
Initially all 11 were allocated to Nîmes to work services to Clermont-Ferrand.
Fleet List NumberRebuilt fromNotes BB 66604 BB 66304 BB 66605 BB 66305 BB 66606 BB 66306 BB 66607 BB 66307 BB 66608 BB 66308 BB 66610 BB 66310 BB 66611 BB 66311 BB 66612 BB 66312 BB 66614 BB 66098Not fitted with ETH BB 66615 BB 66102Not fitted with ETH BB 66616 BB 66106
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