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Skip Navigation LinksSteam Locomotive Diagrams
Diagrams from the Northern Pacific Railway Mechanical Department.  Click an image to see the full size view.

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Class A Diagram 1949.jpg
Class A Diagram 1949
1000 x 489169 KB
Class A-1 Diagram 1949.jpg
Class A-1 Diagram 1949
1000 x 535190 KB
Class A-2 Diagram 1949.jpg
Class A-2 Diagram 1949
1000 x 506146 KB
Class A-3 Diagram 1949.jpg
Class A-3 Diagram 1949
1000 x 505179 KB
Class A-4 Diagram 1949.jpg
Class A-4 Diagram 1949
1000 x 503158 KB
Class A-5 Diagram 1949.jpg
Class A-5 Diagram 1949
1000 x 490149 KB
Class B Diagram 1900.jpg
Class B Diagram 1900
1000 x 45381 KB
Class B-1 Diagram 1900.jpg
Class B-1 Diagram 1900
1000 x 47193 KB
Class B-2 Diagram 1913.jpg
Class B-2 Diagram 1913
1000 x 46460 KB
Class B-3 Diagram 1913.jpg
Class B-3 Diagram 1913
1000 x 48979 KB
Class C-01 Diagram 1900.jpg
Class C-01 Diagram 1900
1000 x 48882 KB
Class C-02 Diagram 1900.jpg
Class C-02 Diagram 1900
1000 x 49884 KB
Class C-03 Diagram 1913.jpg
Class C-03 Diagram 1913
1000 x 51193 KB
Class C-04 Diagram 1900.jpg
Class C-04 Diagram 1900
1000 x 47481 KB
Class C-05 Diagram 1900.jpg
Class C-05 Diagram 1900
1000 x 48888 KB
Class C-06 Diagram 1900.jpg
Class C-06 Diagram 1900
1000 x 49383 KB
Class C-07 Diagram 1900.jpg
Class C-07 Diagram 1900
1000 x 49387 KB
Class C-08 Diagram 1900.jpg
Class C-08 Diagram 1900
1000 x 49183 KB
Class C-09 Diagram 1900.jpg
Class C-09 Diagram 1900
1000 x 49788 KB
Class C-10 Diagram 1900.jpg
Class C-10 Diagram 1900
1000 x 49476 KB
Class C-11.jpg
Class C-11
1000 x 487105 KB
Class C-12 Diagram 1900.jpg
Class C-12 Diagram 1900
1000 x 48580 KB
Class C-14 Diagram 1900.jpg
Class C-14 Diagram 1900
1000 x 50095 KB
Class C-15.jpg
Class C-15
1000 x 481113 KB
Class C-16.jpg
Class C-16
1000 x 490112 KB
Class C-17.jpg
Class C-17
1000 x 487110 KB
Class C-18.jpg
Class C-18
1000 x 493112 KB
Class C-19 Diagram 1900.jpg
Class C-19 Diagram 1900
1000 x 48682 KB
Class C-20 Diagram 1900.jpg
Class C-20 Diagram 1900
1000 x 48485 KB
Class C-21 Diagram 1900.jpg
Class C-21 Diagram 1900
1000 x 49281 KB
Class C-22 Diagram 1900.jpg
Class C-22 Diagram 1900
1000 x 49379 KB
Class C-23 Diagram 1900.jpg
Class C-23 Diagram 1900
1000 x 49274 KB
Class C-24.jpg
Class C-24
1000 x 478107 KB
Class C-25.jpg
Class C-25
1000 x 502104 KB
Class C-26.jpg
Class C-26
1000 x 504105 KB
Class C-27.jpg
Class C-27
1000 x 515113 KB
Class C-28.jpg
Class C-28
1000 x 501105 KB
Class C-29-P32.jpg
Class C-29-P32
1000 x 499109 KB
Class C-29-P33.jpg
Class C-29-P33
1000 x 501106 KB
Class C-30.jpg
Class C-30
1000 x 49192 KB
Class C-31.jpg
Class C-31
1000 x 48487 KB
Class D Diagram 1900.jpg
Class D Diagram 1900
600 x 28638 KB
Class D-01 Diagram 1900.jpg
Class D-01 Diagram 1900
600 x 29439 KB
Class D-02 Diagram 1900.jpg
Class D-02 Diagram 1900
600 x 29038 KB
Class D-03 Diagram 1900.jpg
Class D-03 Diagram 1900
600 x 28739 KB
Class D-05c Diagram 1900.jpg
Class D-05c Diagram 1900
600 x 29241 KB
Class D-05s Diagram 1900.jpg
Class D-05s Diagram 1900
600 x 29535 KB
Class D-06 Diagram 1900.jpg
Class D-06 Diagram 1900
600 x 29135 KB
Class D-08.jpg
Class D-08
1000 x 46499 KB
Class D-09c.jpg
Class D-09c
1000 x 494112 KB
Class D-09s.jpg
Class D-09s
1000 x 472114 KB
Class D-10.jpg
Class D-10
1000 x 46878 KB
Class E Diagram 1900.jpg
Class E Diagram 1900
600 x 28241 KB
Class E-1 Diagram 1900.jpg
Class E-1 Diagram 1900
600 x 27737 KB
Class E-2 Diagram 1900.jpg
Class E-2 Diagram 1900
600 x 27737 KB
Class E-3 Diagram 1913.jpg
Class E-3 Diagram 1913
600 x 30340 KB
Class E-4 Diagram 1900.jpg
Class E-4 Diagram 1900
600 x 27940 KB
Class E-5 Diagram 1900.jpg
Class E-5 Diagram 1900
600 x 28039 KB
Class E-6 Diagram 1900.jpg
Class E-6 Diagram 1900
600 x 28327 KB
Class E-7 Diagram 1913.jpg
Class E-7 Diagram 1913
600 x 28026 KB
Class F-1 Diagram 1913.jpg
Class F-1 Diagram 1913
1000 x 488105 KB
Class F-2 Road Diagram 1900.jpg
Class F-2 Road Diagram 1900
600 x 27338 KB
Class F-2 Switch Diagram 1913.jpg
Class F-2 Switch Diagram 1913
600 x 28734 KB
Class F-3 Diagram 1900.jpg
Class F-3 Diagram 1900
600 x 28230 KB
Class F-4 Diagram 1900.jpg
Class F-4 Diagram 1900
600 x 28630 KB
Class F-5 Diagram 1900.jpg
Class F-5 Diagram 1900
600 x 27922 KB
Class F-5 Switch Diagram 1913.jpg
Class F-5 Switch Diagram 1913
600 x 28824 KB
Class F-6 Diagram 1900.jpg
Class F-6 Diagram 1900
600 x 28322 KB
Class F-6 Switch Diagram 1913.jpg
Class F-6 Switch Diagram 1913
600 x 29025 KB
Class F-7 Diagram 1900.jpg
Class F-7 Diagram 1900
600 x 27920 KB
Class G Diagram 1913.jpg
Class G Diagram 1913
600 x 29332 KB
Class G-1 Diagram 1949.jpg
Class G-1 Diagram 1949
600 x 31341 KB
Class G-2 Diagram 1949.jpg
Class G-2 Diagram 1949
600 x 29859 KB
Class H Diagram 1900.jpg
Class H Diagram 1900
600 x 27830 KB
Class H-1 Diagram 1900.jpg
Class H-1 Diagram 1900
600 x 27830 KB
Class H-1 Diagram 1913.jpg
Class H-1 Diagram 1913
600 x 29347 KB
Class H-2 Diagram 1900.jpg
Class H-2 Diagram 1900
600 x 27828 KB
Class H-2 Diagram 1913.jpg
Class H-2 Diagram 1913
600 x 29330 KB
Class L-05 Diagram 1913.jpg
Class L-05 Diagram 1913
1000 x 547100 KB
Class L-06 Diagram 1949.jpg
Class L-06 Diagram 1949
600 x 28238 KB
Class L-07 Diagram 1913.jpg
Class L-07 Diagram 1913
600 x 29729 KB
Class L-09 Diagram 1913.jpg
Class L-09 Diagram 1913
600 x 28223 KB
Class L-10 Diagram 1913.jpg
Class L-10 Diagram 1913
600 x 29222 KB
Class Q Diagram 1913.jpg
Class Q Diagram 1913
600 x 28425 KB
Class Q-1A Diagram 1913.jpg
Class Q-1A Diagram 1913
600 x 29029 KB
Class Q-1B Diagram 1913.jpg
Class Q-1B Diagram 1913
600 x 29330 KB
Class Q-3A Diagram 1913.jpg
Class Q-3A Diagram 1913
600 x 29429 KB
Class Q-3B Diagram 1913.jpg
Class Q-3B Diagram 1913
600 x 28927 KB
Class Q-4A Diagram 1913.jpg
Class Q-4A Diagram 1913
600 x 29128 KB
Class Q-4B Diagram 1913.jpg
Class Q-4B Diagram 1913
600 x 28727 KB
Class Q-5 Diagram 1949.jpg
Class Q-5 Diagram 1949
1000 x 535172 KB
Class Q-6 Diagram 1949.jpg
Class Q-6 Diagram 1949
600 x 29763 KB
Class S-04c Diagram 1900.jpg
Class S-04c Diagram 1900
600 x 27923 KB
Class S-04s Diagram 1949.jpg
Class S-04s Diagram 1949
600 x 29649 KB
Class S-10 Diagram 1913.jpg
Class S-10 Diagram 1913
1000 x 477126 KB
Class T Diagram 1913.jpg
Class T Diagram 1913
600 x 31236 KB
Class T-1 Diagram 1949.jpg
Class T-1 Diagram 1949
600 x 30163 KB
Class W-0a Diagram 1913.jpg
Class W-0a Diagram 1913
600 x 29733 KB
Class W-0b Diagram 1913.jpg
Class W-0b Diagram 1913
600 x 30142 KB
Class W-1 Diagram 1913.jpg
Class W-1 Diagram 1913
600 x 31335 KB
Class W-2A Diagram 1913.jpg
Class W-2A Diagram 1913
600 x 31642 KB
Class W-2B Diagram 1913.jpg
Class W-2B Diagram 1913
600 x 29534 KB
Class W-3A Diagram 1949.jpg
Class W-3A Diagram 1949
600 x 25853 KB
Class W-3B Diagram 1949.jpg
Class W-3B Diagram 1949
600 x 30165 KB
Class W-3C Diagram 1949.jpg
Class W-3C Diagram 1949
600 x 30463 KB
Class W-3D Diagram 1949.jpg
Class W-3D Diagram 1949
600 x 30264 KB
Class W-4 Diagram 1949.jpg
Class W-4 Diagram 1949
1000 x 508177 KB
Class W-5 Diagram 1949.jpg
Class W-5 Diagram 1949
600 x 29156 KB
Class Z Diagram 1913.jpg
Class Z Diagram 1913
1000 x 50796 KB
Class Z-1 Diagram 1913.jpg
Class Z-1 Diagram 1913
1000 x 501104 KB
Class Z-2 Diagram 1913.jpg
Class Z-2 Diagram 1913
1000 x 505100 KB
Class Z-3 Diagram 1949.jpg
Class Z-3 Diagram 1949
1000 x 487165 KB
Class Z-4 Diagram 1949.jpg
Class Z-4 Diagram 1949
1000 x 527147 KB
Class Z-5 Alco Diagram 1949.jpg
Class Z-5 Alco Diagram 1949
1000 x 487158 KB
Class Z-5 BLW Diagram 1949.jpg
Class Z-5 BLW Diagram 1949
1000 x 487141 KB
Class Z-6 Diagram 1949.jpg
Class Z-6 Diagram 1949
1000 x 532175 KB
Class Z-7 Diagram 1949.jpg
Class Z-7 Diagram 1949
1000 x 462120 KB
Class Z-8 Diagram 1949.jpg
Class Z-8 Diagram 1949
1000 x 455127 KB