Technical Features
The engines of the second batch had a lower weight, due to their shorter boiler and a reduction in the coal and water capacity, in order to be able to run on branch lines with light trackway.
From running number 2094 (1921 series) onwards the locomotives had factory-fitted compressed-air brakes, from running number 2112 (1923 series) the engines were equipped with Knorr feedwater heaters on the crown of the boiler barrel behind the chimney. Those engines delivered prior to that were all retrofitted with compressed-air brakes and, in most cases, also with surface economisers. The 1908/09 series only rarely had preheaters. Where they were fitted they were located to the side of the chimney.
Read more about this topic: Saxon XI HT
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