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The reference for locomotives and railcars

South Manchurian Railway Pashiro class

China Railway SL6

Manchuria 1934 405 produced
Kawasaki works photo

Some similar types of Pacific locomotives were combined in the Pashiro class, which were built from 1933 by various manufacturers for several railway companies with a focus on Manchuria. The vast majority were of a type built by Kawasaki, Nippon Sharyo and Hitachi for the Manchukuo State Railways. They were called “New National Great Pashi” to distinguish them from the Pashisa class. Mantetsu procured 45 examples, some of which were built in Dalian. Eight went to the Central China Railway, which used them under the designation KC100.

Compared to the Pacifics previously used in Manchuria, the major innovations consisted of a boiler with a combustion chamber and a feedwater heater. With a locomotive service weight of just over 100 tonnes, they were also heavier and at the same time they had a larger tender. The engines of Mantetsu received the largest tender with an operating weight of more than 83 tonnes, the tenders of the other operators weighed between 71 and 73 tonnes when loaded. With the 57 examples built directly for the North China Railway during the war, there were a total of 254 by 1944.

After World War II, there were a few locomotives in Korea that were among the 25 originally loaned by the Manchukuo State Railways to what was then Chosen. The Chinese State Railways took over well over 200 examples and classified them as SL6. Due to the lack of more modern locomotive types, another 151 were built between 1956 and 1958. The locomotives were eventually used throughout China and were essential for passenger service. The last ones were even used until 1991.

Technical data

General

Property Pashiro Large Pashi New Large Pashi SL6
Built 1934-1943 1933 1936-1940 1956-1958
Manufacturers Hitachi, Kawasaki, Shahekou Kawasaki, Hitachi, Nippon Shary&#333, Kisha Seiz&#333 Kawasaki, Hitachi, Nippon Shary&#333 Sifang
Wheel arrangement 4-6-2 (Pacific)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property Pashiro Large Pashi New Large Pashi SL6
Length 23.77 m 22.39 m 22.42 m 22.62 m
Service mass 102 t 100.7 t 100.2 t
Adhesion mass 61.8 t 62.2 t
Total mass 185.3 t 171.7 t 173.7 t 172.6 t
Water capacity 35,000 l 25,000 l 30,000 l
Fuel capacity 15 t (coal) 17 t (coal) 14 t (coal)

Boiler

Property Pashiro Large Pashi New Large Pashi SL6
Grate area 4.82 m² 4.84 m²
Firebox surface 22.6 m²
Tube heating surface 177 m²
Evaporative heating surface 199.6 m² 193.03 m²
Superheater surface 67.2 m² 97.03 m²
Total heating surface 266.8 m² 290.1 m²

Power plant

Property Pashiro Large Pashi New Large Pashi SL6
Driver diameter 1,750 mm
Boiler pressure 14 bar
Expansion type simple expansion
Cylinders two, 570 x 660 mm

Power

Property Pashiro Large Pashi New Large Pashi SL6
Power source steam
Estimated power 1,600 kW (2,175 PS) 1,800 kW (2,447 PS)
Starting effort 145.8 kN

Calculated values

Property Pashiro Large Pashi New Large Pashi SL6
Factor of adhesion 1 : 4.15 1 : 4.19
Optimal speed 68 km/h 76 km/h
Power-to-weight ratio 15.7 kW/t 15.9 kW/t 18.0 kW/t
Heating Surface Equivalent 447.0 m²
Cylinder volume/HSE 1 : 753.54
Adhesive weight/Total 1 : 1.65 1 : 1.62 1 : 1.61
Tractive force/Heating surface 1 : 11.41 1 : 10.50
Grate area/Heating surface 1 : 55.35 1 : 59.93
Firebox/Tube surface 1 : 7.83
Total/Superheater 1 : 2.97 1 : 1.99
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