|Engine:||2 Paxman 6ZHXL diesels (2 locos were fitted with Rolls Royce D diesels)|
|Power:||900 hp (672 kW)|
As happened with a number of early British Rail diesel locomotives in the 1960s, amid a clamour to replace steam, series production was agreed and begun before much testing had taken place. In the event this was a real problem with the Class 17 as 117 of them had been built and they proved to be very unreliable. Availability of the fleet dropped to 50% (by comparison the Class 20 was about 90%) with numerous problems including cracked crankcases and oil leaks, some were put into storage straight from the factory.
As the reliability problems continued (even with a couple of examples retro-fitted with Rolls Royce engines), and the kind of light freight traffic they were designed for dropped post-Beeching, British Railways decided to withdraw them after only a few years of service. All were gone from revenue service by 1971.
No Class 17 saw 10 years of BR revenue service though a couple remained in departmental service until the late 1970s . One of these, D8568, survived long enough to make it into preservation.
|D8568 at Bewdley|
|D8568 is based on the CPRR at Chinnor|
|D8568 at Kidderminster SVR next to Class 35 D7029|
|D8568 brings a train into Chinnor|
|At Kidderminster, note how much of the loco length is taken up by the cab!|
 Brian Haresnape, Production Diesel-Electrics Types 1-3 (Ian Allan, 1983) p. 74
 Colin J. Marsden, 25 Years of Railway Research (OPC, 1989) p. 79