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Leyland 680 150hp Engine


Variants

The 680 was a popular Leyland engine also used extensively in road vehicles in both horizontal and vertical forms. As the engine developed over the years, some variants found their way onto DMUs. The differences are listed below. Later the turbocharged variation, the TL11, was also used. The table is from a BR document dated 9/89.

Engine: 680/1 680/13 680/1595/0 680/1595/1 680/4041
Easily identifiable by: Bent fuel pipe mounting bracket. Originally air cooled compressor As 680/1 with long leg mounting bracket with throttle motor mounted on bracket Straight fuel pipe brackets, water cooled compressor, CAV NN pump which is oil pressure lubricated As 1595/0 but with Friedmann & Maier pump Non-turbo TL11?
Leyland Part No: 545817 318703 RE 680/1595 RE 680/1595/1 RE 680/4041
BR Cat No: 15/29975 15/85397 15/1137 15/1631 15/1717
Fuel Pump: CAV 'N' CAV 'N' CAV 'NN' Freidmann & Maier Freidmann & Maier
Timing (BTDC): 30° 30° 30° 22° 22°
Injector Release Pressure: 165-170 ats. 165-170 ats. 230-235 ats. 230-235 ats. 175-180 ats.
Injector Body CAV Part No: BKB 75S 5006 BKB 75S 5006 BKBL 97S 5426 BKBL 97S 5426 BKBL 97S 5006
Injector Despatch No: 5246605 5246605 Special to BR Special to BR 5246601
Nozzle Despatch No: 5620916 5620916 5621812 5621812 5621057
Nozzle Type No: BDLL 140S 6205 A BDLL 140S 6205 A BDLL 140SY 6768 BDLL 140SY 6768 BDLL 140 SY 6306

Leyland 680 Engine


Introduction
Variants

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