Tracing B437742-B
superceeding tracing B417536
Issued, Philadelphia, 5-15-1947
Revised as of 7-9-1949
From the collection of Bob Johnson
Note: This has not been fully proofread yet.
| Interpretation of Classification | |||||||
| Symbol | Refers to | ||||||
| First | Number of axles per truck | ||||||
| Second | A.A.R. Class letter for journal diameter only | ||||||
| Third | Dash-for standard A.A.R. axle | ||||||
| number-for numerical deviation from A.A.R. standard | |||||||
| Fourth | Service of truck. F=Freight, P=Passenger, T=Tender | ||||||
| Fifth | Consecutive design of truck for class | ||||||
| A.A.R. Class | "A" | "B" | "C" | "D" | "E" | "F" | |
| Journal size | 3-3/4" x 7" | 4-1/4" x 8" | 5" x 9" | 5-1/2" x 10" | 6" x 11" | 6-1/2" x 12" | |
| Capy. per axle, 85 M.P.H. | 12500 | 20500 | 27000 | 34000 | 42500 | 51000 | Max. |
| Comments | Old Class | New Class | P.R.R. Axle Classifi-cation | A.A.R. Classifi-cation | Size of Axle | Wheel Base | Class of Cars | Weights | Special Remarks | Truck Arrangement Tracing No. |
|---|---|---|---|---|---|---|---|---|---|---|
| Wooden Cars-Truck Obsolete | 2A1P1 | 2 | A1 | 3-3/4" x 7" | 7'-0" | PF, PG | Wood frame | C30825 | ||
| Wooden Cars-Truck Obsolete | 2A2P1 | 2A | A2 | 3-3/4" x 7" | 7'-0" | PF, PG | Wood frame | A9243 | ||
| Wooden Cars-Truck Obsolete | 2A3P1 | 2B | A3 | 3-3/4" x 7" | 7'-0" | PF, PG | Wood frame | |||
| Wooden Cars-Truck Obsolete | 2B-P1 | 3A | 4" x 8" | 7'-0" | BP, PG, PK | Wood frame | C13464 | |||
| Wooden Cars-Truck Obsolete | 2B-P1 | 3B | 4" x 8" | 7'-0" | PG, PK | Wood frame | C13464 | |||
| Wooden Cars-Truck Obsolete | 2B-P1 | 3C | 4" x 8" | 7'-0" | PG, PK | Wood frame | C13464 | |||
| Wooden Cars-Truck Obsolete | 2B-P2 | 4B | B- | 4-1/4" x 8" | 7'-0" | MP1, MP2, MO1, MB1, MBM1 (Built 1906, 1907, 1908, 1909 Trailer) | W.J.&S.R.R. | C65964 | ||
| Wooden Cars-Truck Obsolete | 2B-P3 | 3A | 4" x 8" | 8'-0" | PG, PK | Wood frame | C21852 | |||
| Wooden Cars-Truck Obsolete | 2B-P3 | 3B | 4" x 8" | 8'-0" | PG, PK | Wood frame | C21852 | |||
| Wooden Cars-Truck Obsolete | 2B-P3 | 3C | 4" x 8" | 8'-0" | PG, PK | Wood frame | C21852 | |||
| Wooden Cars-Truck Obsolete | 2B-P3 | 4B | B- | 4-1/4" x 8" | 8'-0" | PG, PK | Wood frame | C21852 | ||
| Wooden Cars-Truck Obsolete | 2B1P1 | 4A | B1 | 4-1/4" x 8" | 7'-0" | PF, PG | Wood frame | C9206 | ||
| Wooden Cars-Truck Obsolete | 2C-P4 | 6A | C- | 5" x 9" | 8'-0" | PK | Wood frame | C19179 | ||
| Wooden Cars-Truck Obsolete | 2C-P5 | 6A | C- | 5" x 9" | 7'-0" | PK | Wood frame | No Trac. | ||
| Wooden Cars-Truck Obsolete | 3A1P1 | 2 | A1 | 3-3/4" x 7" | 10'-0" | BA | Wood frame | C3901 | ||
| Wooden Cars-Truck Obsolete | 3A2P2 | 2A | A2 | 3-3/4" x 7" | 10'-6" | BB, OF, OG | Wood frame | A8754 | ||
| Wooden Cars-Truck Obsolete | 3B-P1 | 4B | B- | 4-1/4" x 8" | 10'-6" | BE, BL, BN, MH, MI, OK, OL, PL | Wood frame | C30586 | ||
| Wooden Cars-Truck Obsolete | 3C-P3 | 6A | C- | 5" x 9" | 10'-9" | MM | Wood frame | C22103 | ||
| Out of Service | UNIT TRAIN | 8'-0" | MP54 (No 303) Experimental | Timken inboard roller bearings | C406707 | |||||
| 2B | 2C-P1 | 6A | C- | 5" x 9" | 7'-0" | MP54, MPB54 | 13000 | C76061 | ||
| 5 | 2C-P2 | 6A | C- | 5" x 9" | 8'-0" | MP54, MP54c, MPB54, MPBM54, MBM62 | 12500 | C67161 | ||
| 5 | 2C-P2 | HYATT | 5" x 9" | 8'-0" | MP54 (Cars No 79, 202, 390, 417, 428, 686) | 12500 | Hyatt roller bearing | C67161, C83703 | ||
| 5TR | 2C-P2 | 6A | C- | 5" x 9" | 8'-0" | MP54d, MPB54d (W.J.&S.R.R) | 12500 | Pilot on truck | C67161 | |
| 5A | 2C-P3 | 6A | C- | 5" x 9" | 8'-0" | MP54E, MP54E1, MP54E2, MPB54E, MPB54bE2, MB62E1, MB62E2, MBM62E, MBM62E2, MP54d | 14300 | Pilot on truck | C437713 | |
| 5A | 2C-P3 | 6A | C- | 5" x 9" | 8'-0" | MPB54b, MPB54c, T62 (Double deck, Long Island) | 14300 | Steam service | C437713 | |
| 5A | 2C-P3 | 6A | C- | 5" x 9" | 8'-0" | MP54a1 (Special brake connection to body) | 14300 | Long Island | C99500 | |
| None Built | 10, 10M | 6A | C | 5" x 9" | 7'-0" | Trailer and motor trucks, P.R.R. Design, 1916 | C55044 | |||
| 4M | 2C2P1 | 6C, 6CM | C1, C2 | 5" x 9" | 7'-0" | MP38 (H.&.M.R.R.) | 17200 | One motor on truck | C71452 | |
| 2C1P2 | 6C, 6CM | C1, C2 | 5" x 9" | 7'-0" | MP38a (H.&M.R.R.) | 18680 | One motor on truck | D73676 | ||
| 2C3P1 | 6M | C3 | 5" x 9" | 7'-0" | MP1, MP2 (W.J.&S.R.R., built 1906) | Motor truck | C65965 | |||
| 2C3P2 | 6M | C3 | 5" x 9" | 7'-0" | MP2, MO1 (W.J.&S.R.R, built 1907, 1909) | Motor truck | C65966 | |||
| 5-1/2" x 10" | MP54E2, MP54E3 (7 cars motor and trailer trucks, S.K.F., Timken Roller Bearing) | Birdsboro-Taylor design | ||||||||
| 6 | 2D-P1 | 7 | D- | 5-1/2" x 10" | 8'-0" | P70, P70d | 14000 | C41242 | ||
| 6A | 2D-P2 | 7 | D- | 5-1/2" x 10" | 8'-0" | P70, P70d, B60, B60a | 16000 | C. Steel Transom | C437712 | |
| 2D-P3 | 7 | D- | 5-1/2" x 10" | 6'-3" | B60b | 12000 | Cantilever | D76837 | ||
| 1st Quad | 2D-P4 | 7 | D- | 5-1/2" x 10" | 8'-0" | P70 (Cars No. 1505, 1506, 1509, 1535, 1637, 1840) | Commonwealth, original design | C62343 | ||
| 2D-P5 | D- | 5-1/2" x 10" | 8'-0" | B60b, R50b, P70, BM60, PC70 | 18000 | Commonwealth, friction bearing | C83368 | |||
| 2D-P5 | S.K.F. | 5-1/2" x 10" | 8'-0" | P70, PC70, PC70b, P70d | 18000 | Commonwealth, S.K.F. bearings | C83368 | |||
| 2D-P5 | Timken | 5-1/2" x 10" | 8'-0" | P70, P70d | 18000 | Commonwealth, Timken bearings | C83368 | |||
| 2D-P5 | Hyatt | 5-1/2" x 10" | 8'-0" | P70, PC70, P70d (P70 Alma Draft) | 18000 | Commonwealth, Hyatt bearing | C83368 | |||
| 2D-P5 | Hydraulic Tool | 5-1/2" x 10" | 8'-0" | P70 (Car No. 1660 Bearings Changed to P70-3665) | 18000 | Commonwealth, Hydraulic Tool bearings | D86383 | |||
| 2D-P5 | 7 | D- | 5-1/2" x 10" | 8'-0" | R50b (With bifurcated pedestal) | 18000 | Commonwealth, friction bearings | C83368 | ||
| Roller Bearings | 2D-P6 | D- | 5-1/2" x 10" | 9'-0" | D82R (Budd Dining Cars, Nos. 4500, 4501) | 17350 | Cast steel frame, S.K.F. bearings | A422405, A422443 | ||
| Roller Bearings | 2D-P7 | D- | 5-1/2" x 10" | 9'-0" | P82R (Budd Coaches, Nos. 4000, 4001) | 16850 | Cast Steel Frame, Timken bearings | A422098, A429488 | ||
| Roller Bearings | 2D-P8 | D- | 5-1/2" x 10" | 9'-0" | P82aR, P85aR (Pullman) | S.C. frame, Roller bearings | ||||
| Roller Bearings | 2D-P8 | D- | 5-1/2" x 10" | 9'-0" | D82cR (A.C.&F.) | S.C. frame, Roller bearings | A420429, A429488 | |||
| Roller Bearings | 2D-P8 | D- | 5-1/2" x 10" | 9'-0" | D82bR, D85R, P85R (Budd) | 17220 | Cast steel frame, Timken bearings | |||
| Roller Bearings | 2D-P9 | D- | 5-1/2" x 10" | 8'-0" | P70 (2 Trucks Built) | S.C. frame, Roller bearings | C422592, D78374 | |||
| Roller Bearings | 2D-P10A | D- | 5-1/2" x 10" | 9'-0" | Experimental (2 Trucks Built) | 18000 | S.C. frame, Roller bearings | Research drawings | ||
| Roller Bearings | 2D-P12 | D- | 5-1/2" x 10" | 8'-0" | P70 (30 Cars) | 19000 | S.C. frame, Roller bearings | A425904, D78374 | ||
| Roller Bearings | 2D-P13 | D- | 5-1/2" x 10" | 7'-0" | Chrysler, 10 Trucks Built, Scrapped, Timken Quad Bearings used for Bus. cars) | 16130 | All H springs | Chrysler drawings | ||
| Roller Bearings | 2D-P14 | D- | 5-1/2" x 10" | 8'-8" | T70a (Trailer Truck, Double deck, Long Island) | C.S. frame, Roller bearings | A437011 | |||
| Roller Bearings | 2D-P15 | D- | 5-1/2" x 10" | 8'-6" | P85b, D85cR (13-3/8" Pedestal Opening) | 18090 | C.S. frame, Roller bearings | A435501 | ||
| None built | 3M | 2D2P1 | 7M | D2 | 5-1/2" x 10" | 8'-6" | Designed for Long Island | 2 motors | C36609 | |
| 2 | 2D3P1 | 6B | D3 | 5-1/2" x 9" | 7'-0" | P70, P70d, B60, R60 | 13000 | C76061 | ||
| Out of service | 2A | 2D3P2 | 6B | D3 | 5-1/2" x 9" | 7'-0" | None | Generator | C76061 | |
| 2D3P3 | 6B | D3 | 5-1/2" x 9" | 7'-0" | P70 (Car No. 1679), R60 (Car No. 5721) | Equalizer | C40780 | |||
| 5M | 2D4P1 | 6BM | D4 | 5-1/2" x 9" | 8'-0" | MP54d, MPB54d (W.J.&S.R.R.) | 28000 | Motor truck | C58530 | |
| 2C | 2D5P1 | 7B | D5 | 5-1/2" x 11" | 7'-0" | P70, P70c, P70d, P53, P58, B60, R60, Z62 (Track Inspection) | 14450 | C45220 | ||
| 1st. Application of R.B. (New wide pedestal) | 2C | 2D5P1 | S.K.F. | 5-1/2" x 11" | 7'-0" | P70 (Cars No. 1731, 1785, 1409, 4925, 3478; blt 1913) | 14700 | S.K.F. roller bearings | C45220 | |
| Out of service | 2D5P1 | 5-1/2" x 11" | 7'-0" | Std., Experimental out of service, blt 1913 | Roller bearings | D45306 | ||||
| Out of service | 2D5P1 | 5-1/2" x 11" | 7'-0" | 2-RO Hess-Bright, Experimental out of service, blt 1913 | Ball bearings | D45555, C49654 | ||||
| Out of service | 2D5P1 | 5-1/2" x 11" | 7'-0" | Criss Cross Bearings, Experimental out of service, blt 1916 | C55199 | |||||
| Out of service | 2D5P1 | 5-1/2" x 11" | 7'-0" | N.K.A., Experimental out of service, blt 1920 | Roller bearings | C66094 | ||||
| 7 | 2D5P2 | 7B | D5 | 5-1/2" x 11" | 8'-0" | P70, P70d, B60, B60a, Z62 | 15640 | C67596 | ||
| 9 | 2D5P3 | 7B | D5 | 5-1/2" x 11" | 5'-10" | B50, R50, R50a (6 trucks built) | 12000 | D62087 | ||
| 2D5P4 | 7B | D5 | 5-1/2" x 11" | 8'-0" | P70 (Cars No. 1644, 1596) | D74628 | ||||
| Narrow or wide box | 2D5P5 | 7B | D5 | 5-1/2" x 11" | 8'-0" | P70 | 17645 | Commonwealth, friction bearings | C78370 | |
| None built | 2D5P6 | 7B | D5 | 5-1/2" x 11" | 8'-0" | Designed for MP54E2 | Trailer, friction bearings | D79077 | ||
| 8M | 2D6P1 | 7BM | D6 | 5-1/2" x 11" | 8'-8" | MP54E, MP54E1, MP54E2, MPB54E, MPB54bE2, MB62E, MP62E2, MBM62E, MBM62E2 | 31500 | Motor truck | C61117 | |
| 8M | 2D6P1 | 7BM | D6 | 5-1/2" x 11" | 8'-8" | MP54 (None in steam service) | 17500 | C61117 | ||
| 8MA | 2D6P2 | 7BM | D6 | 5-1/2" x 11" | 8'-8" | MP54d (2 cars, W.J.&S.R.R.) | 32000 | Motor truck | C64851 | |
| None built | 2D6P3 | 7BM | D6 | 5-1/2" x 11" | 8'-8" | Designed for MP54E2 | Motor truck, Friction bearings | C79017 | ||
| None built | 7B | 2D7P1 | 7BM | D7 | 5-1/2" x 11" | 8'-0" | Designed for heavy type cars | P.R.R. Design, Roller bearings | D74628 | |
| 2D5P5 with R.B.-Wide box | 2D7P2 | 7BM | D7 | 5-1/2" x 11" | 8'-0" | P70, PC70, POC70R (observation end) | 18700 | Commonwealth, Roller bearings | C78370 | |
| 2D7P3 | 7BM | D7 | 5-1/2" x 11" | 8'-8" | MP54E2 | 15800 | Trailer, Roller bearings | D79077 | ||
| 2D8P1 | 7BM | D8 | 5-1/2" x 11" | 8'-8" | MP54E2, MP54a | 32000 | Motor truck, Roller bearings | C79017 | ||
| 2D7P1 | 7BM | D8 | 5-1/2" x 11" | 8'-8" | MP54a1, MP54d1 (Long Island) | 32000 | Motor and trailer | |||
| 2D8P2 | 7BM | D8 | 5-1/2" x 11" | 8'-8" | MP70, T70 (Double deck, Long Island) | Motor and trailer, Roller bearings | C412405 | |||
| Just for record should have been 2D7P2A | 2D9P1 | 7B | D9 | 5-1/2" x 11" | 8'-0" | POC70R (Kitchen End, 6" x 11" tender axle with bearing turned to 5-1/2" x 11, 2D7P2 Truck) | S.C. Frame, Roller bearings | C78370 | ||
| 2D10P1 | D10 | 5-1/2" x 11" | 9'-0" | P85cR (No. 4045, P.S.C. Co.) | Roller bearings in wheel hub | C431066 | ||||
| Roller bearings | 2D11P1 | D11 | 5-1/2" x 10" | 8'-8" | MP70a (Motor Truck, Double deck, Long Island) | C.S. Frame, Roller bearings | A437011 | |||
| Roller bearings | 2D12P1 | 5-1/2" x 10" | 8'-10" | MP54E6 (4 motor equipment) | C.S. Frame, Roller bearings | |||||
| None built | 2E-P1 | E | 6" x 11" | 6'-3" | Designed for baggage cars | C82358 | ||||
| 2C, 7 | 2E-P2 | E- | 6" x 11" | 7'-0", 8'-0" | Converted 2D5P1 (Car 5731), 2D5P2 (Car 5730) | See S.K. 389 | ||||
| None built | 2E-P3 | E- | 6" x 11" | 7'-4" | Chrysler | Chrysler drawings | ||||
| Out of service | 2E-P4 | E- | 6" x 11" | 8'-0" | MP54E3 (Gibbs & Hill motor truck, car No. 459) | |||||
| 2E-P5 | E- | 6" x 11" | 8'-6" | PLB85R, POC85aR, D85dR | Flat bar & I beam drop-forged equalizer | C436850 | ||||
| Roller bearings | 2F-P1 | F- | 6-1/2" x 12" | 9'-0" | D78dR | C.S. frame, Nickle steel equalizer | ||||
| 1 | 3C-P1 | 6A | C- | 5" x 9" | 11'-0" | PB70, B70, BM70, BM70a, BM70c, BM70d, BM70e, BM70f, B74a, M70, M70a | 21000 | C75046 | ||
| Out of service | 1A | 3C-P2 | 6A | C- | 5" x 9" | 11'-0" | Generator | C75046 | ||
| None built | 3C-P4 | 6A | C- | 5" x 9" | 11'-0" | Clasp brake (proposed modification of 3C-P1) | C75046 | |||
| Application of roller bearings will not change class | 3D-P1 | D- | 5-1/2" x 10" | 11'-3" | Z74d, D70, D78, D78a, D78b, B74b | 25800 | Commonwealth, Friction bearings | C83346 | ||
| Application of roller bearings will not change class | 3D-P1 | S.K.F. | 5-1/2" x 10" | 11'-3" | D70, D78, D78a, D78c | 25800 | Commonwealth, S.K.F. bearings | C83346 | ||
| Application of roller bearings will not change class | 3D-P1 | Timken | 5-1/2" x 10" | 11'-3" | D70, D78, D78a | 25800 | Commonwealth, Timken bearings | C83346 | ||
| Application of roller bearings will not change class | 3D-P1 | Hyatt | 5-1/2" x 10" | 11'-3" | PB70, D70, D78, D78a, D78b | 25800 | Commonwealth, Hyatt bearings | C83346 | ||
| Application of roller bearings will not change class | 3D-P1 | Fafnir | 5-1/2" x 10" | 11'-3" | D78 (No. 4479) | 25800 | Commonwealth, Fafnir bearings | D99324 | ||
| 3D-P2 | D- | 5-1/2" x 10" | 11'-3" | S.C. frame, roller bearings | A425320, C78253 | |||||
| 1B | 3D5P1 | 7B | D5 | 5-1/2" x 11" | 11'-0" | PB70, BM70e, BM70f | C46092 | |||
| 1C | 3D5P2 | 7B | D5 | 5-1/2" x 11" | 11'-0" | PC70a, B70a, PB70, PBM70, BM70d, BM70e, BM70g, B74a, B74b, B70a, M70 | 23200 | C437714 | ||
| 1C | 3D5P2 | S.K.F. | 5-1/2" x 11" | 11'-0" | PB70 (Car No. 4925) | 25000 | S.K.F. roller bearings | C437714 | ||
| 1D | 3D5P3 | 7B | D5 | 5-1/2" x 11" | 11'-0" | PB70, B70a, BM70k, Z68, PB70dr (7506-7516, 7515-7517) | 22685 | C69394 | ||
| None built | 3D5P4 | 7B | D5 | 5-1/2" x 11" | 11'-0" | P.R.R. design | C75004 | |||
| Plain bearings | 3D5P5 | 7B | D5 | 5-1/2" x 11" | 11'-3" | D78, D78b, PB70, PBM70a, BM70l, D70, Z74b, Z74c, Z74e | 26400 | Commonwealth | C78252 | |
| None built | 3D5P6 | 7B | 5-1/2" x 11" | 11'-0" | PB70 (Clasp brake, proposed modification of 3D5P1) | C46092 | ||||
| Out of Service | 3D7P1 | 7B | D7 | 5-1/2" x 11" | 11'-0" | PB70 | 25000 | P.R.R. Design, S.K.F. roller bearings | C75004 | |
| 3D5P5 with R.B.-wide box | 3D7P2 | 7B | D7 | 5-1/2" x 11" | 11'-3" | D78, D78b, PB70 | 26550 | Commonwealth, S.K.F. roller bearings | C78252 |