Description
These units were originally built as two-car Class 155 units by British Leyland from 1987–88, but were converted by Hunslet-Barclay at Kilmarnock from 1991–92. The layout of the original non-cab ends was different from the original cab end, so the ends are noticeably distinct, and the vehicles are not symmetrical.
Their maximum speed is 75 mph (121 km/h) and suited for working less popular local services such as the London Midland service from Coventry to Nuneaton and the Heart of Wales Line. They are fitted with standard BSI auto-couplers and are therefore able to work in tandem with other multiple units fitted with the same coupler, including Class 150, Class 156 and Class 158 units as well as newer units like the Class 170 DMU.
The new or small cab is significantly smaller than the original Leyland cab and encroaches on the door vestibule area, providing cramped conditions for Drivers and Guards. Similar to other Sprinter Units, such as the classes 150/2, 156 and 158, these units have gangway door connections at either end that allow passengers and staff to walk between units working in multiple. These units also have the benefit of having passenger door control panels at either end of the cars.
Units are numbered in the range 153301-335 and 153351-385. Individual cars are numbered 52301-335 and 57351-385 (originally 57301-335).
Read more about this topic: British Rail Class 153
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