The reference for locomotives and railcars


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Hungarian State Railways and Košice–Bohumín Railway series IIIq
later series 325 and Czechoslovak State Railways class 334.3
Austria-Hungary | 1893 | 282 produced

One of the locomotives which achieved the highest numbers in the Hungarian State Railways was the series IIIq 0-6-0 freight locomotive. It was considered the successor to the IIIe, but in contrast to this had an internal frame. Between 1893 and 1907, MÁV received 247, all of which were manufactured by MÁVAG. The KsOd also purchased 35 identical machines that were delivered between 1899 and 1909 and were also referred to as IIIq. At the MÁV they became the class 325 from 1911.

It was powered by a two-cylinder compound engine. To adapt to different requirements, a blastpipe with a variable cross-section was installed, with which the balance between the counter pressure of the cylinders and the draft could be changed. Due to its excessive complexity, this mechanism was later removed again.

Despite the overhanging cylinders and firebox and the resulting poorer running smoothness, these locomotives were also regularly used to transport passenger trains. After the First World War, 102 had to be given to Romania, 68 to Yugoslavia, nine to Czechoslovakia and three to Poland.

Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length31 ft 5 3/4 in
Wheelbase11 ft 5 13/16 in
Fixed wheelbase11 ft 5 13/16 in
Empty weight84,437 lbs
Service weight93,696 lbs
Adhesive weight93,696 lbs
Axle load31,306 lbs
Water capacity3,302 us gal
Fuel capacity14,991 lbs (coal)
Power sourcesteam
Estimated power536 hp (400 kW)
Optimal speed19 mph
Top speed37 mph
Starting effort17,816 lbf
with start valve21,379 lbf
Power Plant
Driver diameter56.7 in
Boiler pressure188 psi
Expansion typecompound
Cylinderstwo, HP: 19 1/8 x 25 9/16 in
and LP: 27 9/16 x 25 9/16 in
Grate area22.6 sq ft
Firebox area94.7 sq ft
Tube heating area1,222.8 sq ft
Evaporative heating area1,317.5 sq ft
Total heating area1,317.5 sq ft
Calculated Values
steam locomotive
last changed: 11/2023

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