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Sri Lanka Railways S8
S8 DMU No. 831
Stock type	Diesel Multiple Unit
In service	1991-present
Manufacturer	Hitachi
Constructed	1991
Entered service	1991
Number built	20
Number in service	20
Formation	DPC + 4 TC + DTC
Fleet numbers	821-840
Operators	Sri Lanka Railways
Lines served	Main Line Kelani Valley Line Puttalam Line Coastal Line
Specifications
Car length	65 ft (19.81 m)
Maximum speed	88 km/h (55 mph)
Weight	70 t (69 long tons; 77 short tons)
Prime mover(s)	MTU 12V396TCI13
Engine type	V12 diesel
Power output	1,430 hp (1,070 kW)
Transmission	Voith L 520 R U2
Braking system(s)	Air
Coupling system	Automatic (dual)
Multiple working	Yes
Track gauge	1,676 mm (5 ft 6 in)

Sri Lanka Railways S8 is a class of Diesel multiple unit (DMU) train set made by Hitachi and Hyundai operated by Sri Lanka Railways. They were imported to Sri Lanka in 1991 and primarily runs on the Kelani Valley Line.

History

This class was introduced 12 years after the previous S7 DMU was imported. 20 train sets were ordered in order to strengthen the DMU fleet of Sri Lanka Railways.

Technical specifications

The Class S8 has four passenger compartments, including a dummy control unit. There are no vestibules between the compartments, giving the DMU a better ability to run through sharp curves such as those on the Kelani Valley Line.

The complete S8 DMU has a total axle load of 17,500 kilograms (38,600 lb).

Owing to the high power of the engine, this DMU has a higher acceleration rate and also can be used for multiple unit working. The Class S8 only has third class accommodations as it is primarily used for commuter services.

**Formations**
Formation	Number of Cars	Key
DPC + 4 TC + DTC	6	DPC - Driving Power Car TC - Trailer Car DTC - Driving Trailer Car (Dummy Car)

Operations

Multiple S8 units are used in peak hours. These are mostly used for short distance commuter services. The lines operated using the Class S8 are as follows:


Line	Starting Station	Key Stations	Terminus Station
Main Line	Colombo Fort	Polgahawela	Rambukkana
Kelani Valley Line	Colombo Fort		Avissawella
Puttalam Line	Colombo Fort		Puttalam
Coastal Line	Colombo Fort		Aluthgama

Incidents

In 1991, a service train and a S8 DMU collided together, and the Dummy Unit of the DMU was destroyed.
In 1998, due to a derailment with Canadian-built Class M2 Montreal, another Dummy Unit of a S8 DMU was destroyed.

Gallery

References

"loco-info.com - Sri Lanka Railways class S8". loco-info.com. Retrieved 2024-09-27.
^ "Class S8". Sri Lanka Railway Forum. 2019-03-10. Retrieved 2023-05-25.

v t e Locomotives and railcars of Sri Lanka
Steam locomotives	A1 A2 A3 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 C1 D1 D2 D3 E1 F1 F2 F3 H1^ J1^ J2^ K1^ L1^
Diesel-electric locomotives	G1 G2 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Diesel-hydraulic locomotives	P1^ N1^ N2^ W1 W2 W3 Y Y1
Steam railcars	R1 R2 R3 R4 V1^ V2^
Diesel railcars	T1 T2
Diesel multiple units	S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14
^ indicates narrow (2 ft 6 in / 762 mm) gauge stock

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