Sri Lanka Railways class M5
Sri Lanka 1979 16 produced
The M5 is a series of 16 four-axle diesel-electric locomotives built in 1979 by Hitachi for the Sri Lanka Railways. They were originally powered by an MTU V12 built by Ikegai in Japan with 1,640 hp. Due to technical problems, they only had a short service life in their original form. While some were withdrawn, a total of 13 were rebuilt.
The first one was No. 769 that received an MTU 396 in 1991 and became class M5A. This engine was left over as a spare for an S8 DMU and only had 1,150 hp. Four were rebuilt to M5B starting in 1997 with a 1,500 hp Paxman Valenta. From 2001, eight became M5C by replacing the engine with a Caterpillar 3516 DITA delivering 1,570 hp.
Technical data
General
| Property | as built | rebuilt M5A | rebuilt M5B | rebuilt M5C |
|---|---|---|---|---|
| Built | 1979 | 1991 | 1997 | 2001-2010 |
| Manufacturers | Hitachi | |||
| Wheel arrangement | B-B | |||
| Gauge | 1,676 mm (Indian broad gauge) | |||
Dimensions and weights
| Property | as built | rebuilt M5A | rebuilt M5B | rebuilt M5C |
|---|---|---|---|---|
| Service mass | 66 t | |||
| Adhesion mass | 66 t | |||
| Axle load | 16.5 t | |||
Power plant
| Property | as built | rebuilt M5A | rebuilt M5B | rebuilt M5C |
|---|---|---|---|---|
| Engine | MTU 12V 652 TD11 | MTU 396 TC13 | Paxman Valenta RP200L | Caterpillar 3516 DITA |
| Engine type | V12 diesel | V16 diesel | ||
Power
| Property | as built | rebuilt M5A | rebuilt M5B | rebuilt M5C |
|---|---|---|---|---|
| Power source | diesel-electric | |||
| Indicated power | 1,220 kW (1,659 PS) | 860 kW (1,169 PS) | 1,110 kW (1,509 PS) | 1,170 kW (1,591 PS) |
| Top speed | 97 km/h | |||
Calculated values
| Property | as built | rebuilt M5A | rebuilt M5B | rebuilt M5C |
|---|---|---|---|---|
| Power-to-weight ratio | 18.5 kW/t | 13.0 kW/t | 16.8 kW/t | 17.7 kW/t |
| Adhesive weight/Total | 1 : 1.00 | |||
