Class 6600

Number series: 6601-6617
UIC Class: 92 84 2266 xxx-x
Number built for ERS: 17
Introduced: 2002/2006
Number in service: 3 (January 2010)
Type: JT42CWR
Axle arrangement: Co'Co'
Continuous power rating: 1850kW
Maximum speed: 120km/h
Maximum tractive effort: 409kN
Weight in working order: 127.4 tonnes
Length: 21.930m
Motor: GM 12N-710G3B-EC two stroke of 2462kW at 900rpm
Transmission: Electric
Builder: General Motors, London, Ontaria, Canada

New freight operator ERS Railways leased 5 large diesel locomotives from Porterbrook with the numbers PB07 - PB11 (now 6601-6605), followed in 2003 by 5 more
. These locomotives are the same type as British class 66, of which over 300 are already operating with freight operators EWS, FL and GBRf in the UK. The locomotives are built by General Motors in Canada and especially adapted for the European market. The GM type specification is JT42CWR.
The Nedtrain workshop in Tilburg has adapted these locomotives for operation in different countries in Europe. Therefore, they can operate through trains from the port of Rotterdam to destinations in Germany, and since December 2003 even to Basel in Switzerland.
In June 2005 two more Class 66 locomotives were leased from Mitsui Rail Capital Europe, and in December 2005 another one was taken over from HGK in Germany. In December 2006 four more entered service, leased from MRCE.

At the end of 2008 the lease of the first batch ended, and they quit service for ERS (that instead leased electric locomotives). Still in service are number 6605 and 6611-6617. 6605 was returned in July 2009, and 6613 in August 2009, leaving only 6. In October three more were leased, JT-3/4 and 513-10, 6616 is currently out-of-service after a major accident. In November 561-4 was leased. As more and more trains of ERS are operated by electric locomotives, in January 2010 only nrs. 6611, 6612 and 6617 remained at ERS, all the others were returned to the leasing companies.