PRR K4s - Production

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.

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