| 31. | The setting was later reduced to, which reduced the tractive effort to at 50 % of boiler pressure.
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| 32. | The LNER left the NER's locomotive numbers unchanged, but raised the boiler pressure of the saturated locomotives to.
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| 33. | Several of the earlier locomotives were upgraded to the new 175psi boiler pressure, and redesignated as S class.
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| 34. | It had two cylinders of diameter and stroke operated at maximum boiler pressure of, to produce tractive effort.
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| 35. | Boiler pressure was reduced to 16 bar ( ), hence the engines lost some of their old power.
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| 36. | With a boiler pressure of, these were the first South African engines to use Salter spring balance valves.
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| 37. | Boiler pressure of the G 4 / 5s was originally, and was increased to for locomotives 105 and 106.
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| 38. | These, at a boiler pressure of, gave the locomotive a tractive effort of at 75 % of boiler pressure.
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| 39. | All were reboilered during their lives to raise the boiler pressure from 130 to 160 pounds per square inch.
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| 40. | Thirteen more were built in 1905 6 to slightly different design and with the boiler pressure increased from to.
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