To keep track of the various types, the PRR devised a classification system for them. The following table explains the classification system:
|Interpretation of Classification|
|First||Number of axles per truck|
|Second||A.A.R. Class letter for journal dia. only (see below)|
|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|
|Sixth||Modification to truck design|
|Journal size (in.)||3-3/4x7||4-1/4x8||5x9||5-1/2x10||6x11||6-1/2x12|
|Capy. per axle||15000||24000||32000||40000||50000||60000|
Note: AAR Class C, D, and E trucks were generally used under 40, 50, and 70 ton cars respectively.
Thanks to Ian Clasper, Tom Olsen and Bob Johnson, here are several PRR documents ranging from the 20's to the 50's that list many of the truck types, and which classes of PRR cars they were used under. They are similar, and each contain a summary of the PRR truck classification system, and listing of truck classes with a summary of their features and the car classes they were used on. Early tracings cover freight, passenger and tender trucks, but they were split out into separate tracings later on. All of the files are in .pdf format and some have also been converted to html tables.
PRR Tracing D70003-B, Passenger Cars, Freight Cars and Tenders, Trucks, Classification. Superceedes tracing F67685. Initially issued 6/5/1922, this is revision B dated 1/8/1923. From the collection of Bob Johnson. (pdf file)
PRR Tracing D74604-F, Passenger Cars, Freight Cars, & Tenders, Trucks, Classification. Superceedes tracing D70003. Initially issued 2/13/1924, this is revision F dated 2/6/1929. Also available is revision H dated 3/17/1932. Revision H has the freight cars crossed off as they were moved to tracing E-98401. Both are from the collection of Bob Johnson. (pdf file)
PRR Tracing #E-98401-A, Freight Cars, Trucks, Classification. Supersedes D-74604 (for freight cars only). Initially issued 3/30/1932. This is revision A. Note that passenger and tender trucks remained on tracing D74604. (pdf file, 147K) Also available is Revision D, issued 6/27/1939. Revision D is from the collection of Bob Johnson (pdf file)
PRR Tracing #C422800-D, Freight Cars, Trucks, Classification. Superceedes tracing E98401. Initially issued 11/11/1940. This is version D dated 3/10/1947. Note, I have proofread this, but you can view the pdf file (300K) to be sure. Collection of Tom Olsen, scan by Ian Clasper. Also available is revision E issued 2/6/1950. Note that the quality of the original was very poor on this one! Rev E is from the collection of Bob Johnson.
A Typewritten truck list - This is a later truck list, it's undated but the highest listed drawing number is 462008 (2F-F2L) which was drawn on 3/28/1962 which dates it to sometime shortly after March of 1962. I have no information about the source of this list... Thanks to Bob Johnson for help in dating this! (843K pdf file)
A.C.S. Sketch 482 - contains a listing of various truck types, with tracing numbers, and part numbers for various components. Also has a listing of which trucks were used under a small subset of freight car classes, including car number information. (A.C.S most likely stands for Altoona Car Shops.) The cover sheet which would have had the issue date is missing but is appears to be circa 1949. Thanks to Bob Johnson for helping to date this! (Note that this has not been proofread yet!) (570 K pdf file)
PRR Tracing #B417536-A, Passenger Cars, Trucks, Classification. Revision A, issued 7/8/1939. This has passenger cars only. Collection of Bob Johnson. (1Mb pdf file)
PRR Tracing #B437742-B, Passenger Cars, Trucks, Classification. Originally issued 5/15/1947, this is revision B issued 7/9/1949. This has passenger cars only. Collection of Bob Johnson. (1Mb pdf file)
I'm looking for other truck listings to add here. If you have one that you're able to share, please e-mail me!
Diagrams: Please contact me if you know where I can find more of these!
|2D-F1||Diamond Arch Bar|
|2E-F2||Crown - general arrangement drawing, collection of Gene Deimling (.pdf file)|
Modeling: HO scale so far
Help! If you can correlate any model trucks with PRR classes, please let me know!
|PRR Truck Class||Description||Manufacturer||Part #||Notes|
|2D-F1||Arch Bar||Bowser||74326||shipped w/ early H21/H22 kits|
|2D-F3||Andrews/USRA||Intermountain||?||shipped w/ USRA gon, kit #41608|
|2D-F8||PRR Type w/ coil spring||Bowser||74277||Shipped w/ F30, GS, GLa kits|
|2D-F8||PRR Type w/ coil spring||Red Caboose||5009||-|
|2D-F8||PRR Type w/ coil spring||Kadee||517||-|
|2D-F8||PRR Type w/ coil spring||Sunshine Models||TM7||-|
|2D-F12||PRR Type w/ coil/elliptical springs||Bowser||74190||Shipped w/ X31 kits|
|2D-F12||PRR Type w/ coil/elliptical springs||Sunshine Models||TM6||-|
|2E-F2||Crown Cast||Bowser||74091||Shipped w/ later H21/H22 kits|
|2F-??||100 Ton truck||Bowser||74256||Shipped w/ X43 kit|
|?||ASF A-3 "Ride Control"||Kato||31-601||-|
|?||Barber S-2 Roller Bearing||Kato||31-602||-|
Other sources of truck information:
If you have any information of PRR freight car trucks that isn't found here, please share! I'm looking for PRR freight truck tracings, photos of various clases of trucks, and other PRR truck listings. E-mail me at firstname.lastname@example.org!