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Deutz OMZ 122 R and F
Germany | 1932 | 176 produced
Kö 1002 of the Reichsbahn in the Darmstadt-Kranichstein Railway Museum
Kö 1002 of the Reichsbahn in the Darmstadt-Kranichstein Railway Museum
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The OM range by Deutz consisted of small diesel shunters for industrial railways built in the thirties and early forties. They were powered by two-stroke engines with one to four cylinders. Their development focused on simple construction and cheap maintenance. Most had two axles, where one was powered by a chain and the other was connected to the first one by coupling rods. 

The most numerous model was the OMZ 122 R with 176 produced, where the Z stood for two (zwei) cylinders. While the 1 denoted the first generation of the engine and 22 denoted the cylinder stroke in centimeters, R stood for standard gauge (Regelspur). There were also narrow gauge variants like the OMZ 122 F that was developed for field railways and had a gauge of 600 mm. It only had half the weight of the standard gauge variant and a somewhat lower power.

VariantOMZ 122 ROMZ 122 F
General
Built1932-1942
ManufacturerDeutz
Axle configB 
Gauge4 ft 8 1/2 in (Standard gauge)1 ft 11 5/8 in
Dimensions and Weights
Length17 ft 9 3/8 in12 ft 5 5/8 in
Wheelbase8 ft 2 7/16 in3 ft 9 1/4 in
Rigid wheelbase8 ft 2 7/16 in3 ft 9 1/4 in
Service weight35,274 lbs17,196 lbs
Adhesive weight35,274 lbs17,196 lbs
Axle load17,637 lbs8,598 lbs
Boiler
VariantOMZ 122 ROMZ 122 F
Power Plant
Power
Power sourcediesel-mechanic
Top speed8 mph11 mph
EngineDeutz OMZ 122
Engine type2-cyl. diesel
Engine output42 hp (31 kW)35 hp (26 kW)
Calculated Values
diesel locomotive
small locomotive
switcher
last changed: 04/2024
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