Production
Three years elapsed until production examples were constructed. Partly, this was due to extensive, exhaustive testing, but wartime necessitated priority in construction to the L1s Mikado type for freight. In 1917, Altoona's Juniata Shops started producing K4s in numbers. The first 168 carried widely scattered road numbers as traditional for the PRR, but subsequent locomotives produced after 1920 were assigned numbers in consecutive blocks.
| Year | Quantity | Road numbers |
|---|---|---|
| 1914 | 1 | 1737 |
| 1917 | 41 | assorted numbers |
| 1918 | 111 | 3667–3684, 5334–5349, plus assorted numbers |
| 1919 | 15 | assorted numbers for PRR Lines West |
| 1920 | 50 | 3726–3775 |
| 1923 | 57 | 3800, 3801, 3805–3807, 3838–3889 |
| 1924 | 50 | 5350–5399 |
| 1927 | 92 | 5400–5491 |
| 1928 | 8 | 5492–5499 |
Numbers 5400–5474 were built by Baldwin, while all others were constructed at the PRR's Juniata Shops.
Read more about this topic: PRR K4s
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