TYPE: Brush Type 2

BUILT: 1957 - 1962 Brush Electrical Machines Ltd.

ENGINE: Originally fitted with Mirrlees 1,200hp V12. All replaced by B.R. with English Electric Co. 12SVT 12-cylinder

ENGINE OUTPUT: 1,470 BHP @ 850rpm

TRANSMISSION: Electric

MAIN GENERATOR: Brush TG160.48

AUXILIARY GENERATOR: Brush TG69.42

TRACTION MOTORS: Four Brush TM73-68

MAX TRACTIVE EFFORT: 48,800lb/f for 101-116. 35,900lb/f for 117-424

CONTINUOUS TRACTIVE EFFORT: 22,250lb/f @ 19.5mph for 101-116. 18,700lb/f @ 23.5 mph for 117-424

MAX SPEED: 90 mph

FUEL TANK CAPACITY: 530 gallons.

BOILER WATER TANK CAPACITY: 600 gallons.

WEIGHT: 107 - 113 tons.

BRAKE FORCE: 31/1 = 49tonnes. 31/4 = 48tonnes AIR/VACUUM/EQ.

ROUTE AVAILABILITY: 31/1 RA=5 31/4 RA=6

COUPLING CODE: Blue Star

LENGTH: 56 ft 9 in.

WIDTH: 8 ft 9 in.

HEIGHT: 12 ft 7 in.

BOGIE CENTERS: 28 ft 10 in.

BOGIE WHEELBASE: 14 ft 0 in.

WHEEL ARRANGEMENT: A1A-A1A

DRIVING WHEEL DIAMETER: 3 feet 7 inches

CENTER WHEEL DIAMETER: 3 feet 3 & a half inches

ETH INDEX: 31/4 = 66. (ETH was retrofitted to 24 locos in 1972, these were allocated as a sub class 31/4. this modification and reclasification was later applied to more of the class)

ORIGINAL NUMBER SERIES: D5500 - D5699, D5800 - D5862

TOPS NUMBER SERIES: 31/0 = 31002-31019. 31/1 = 31101-31327. 31/4 = 31401-31424.