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  • Spotting features

    HOw do I tell the difference between a GP-40 and a GP-40-2? Are the differences major or subtle?

    Thanks.
    If the builders plate doesn\'t say ALCO.

    Its not a real locomotive!

  • #2
    The fastest way is by the water sight glass. That's an itty bitty window through one hood door on the engineer's side, beneath the radiator intake grills. I don't know of any straight 40's that have this.

    Second - GP40-2's with dynamic brakes have extended-range DB - a longer "blister" on the roof.

    There are other more subtle differences, but those are the easiest ones for the inexperienced eye.

    B-Dubya out -

    --------------------------------------------------------------------------------

    Modelling the Cape Breton & Central Nova Scotia Railway in HO

    Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!

    Edited by - BentnoseWillie on 07/30/2002 09:02:55
    B-Dubya out -

    --------------------------------------------------------------------------------

    Modelling the Cape Breton & Central Nova Scotia Railway in HO



    Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!

    Comment


    • #3
      Thanks Willie.

      I was wondering.
      If the builders plate doesn\'t say ALCO.

      Its not a real locomotive!

      Comment


      • #4
        Usually dash 2 geeps have a shock absorber on one axle of each truck. Pre dash 2 GP's don't. Later dash 2's have a corrugated radiator. Early dash 2's look like pre dash 2's though.

        Comment


        • #5
          One thing I found out about that shock absorber, not all railroads opted for that puppy on their -2s. I miss ID'd some Rio Grande GP40-2s cause I assumed that all the -2s were built with the later truck design. All of the Grande's 40-2s came with good ol' standard Blomberg trucks.



          Don in Orygun City

          Comment


          • #6
            Also the rear of the cab roof has an overhang which is not present on the straight GP40's. This roof line holds true for all dash 2's and post dash 2's. There are some rebuilt GP40's that I have seen that have the water sight glass window.

            Robert

            CEO of the Pacific Southern Ry.

            Robert C. Werth Jr.
            Robert C. Werth Jr.

            Comment


            • #7
              Then you take into account all the part swaps, wrecks, rebuilds, repaints and etc., about the best way is know the history of the unit. Case in point is an ex DRGW SD40T-2, AKA Tunnel Motor, running around out there that looks like an SD40-2 unless you look close or wonder why it is longer that normal. As far as the sight glass, some have it and some do not.

              Jim Harrawood

              Utah Rails
              Jim Harrawood

              Utah Rails

              Comment


              • #8
                quote:


                There are some rebuilt GP40's that I have seen that have the water sight glass window.


                id=quote>id=quote>Hey, I learned something today! It's a good day.
                I guess the best and quickest way is to look at the following:

                - Blomberg B trucks, with one brake cylinder and one snubber (shock absorbers, if you like) on each sideframe. As opposed to Blomberg M's with two brake cylinders on each sideframe and no snubbers (like GP9's and F7's)

                - Overhang on the rear of the cab roof.

                - Radiator water sight glass on hood.

                All of these are fairly easy to spot. If it has 2 out of the three, it's probably a Dash-2. Especially the cab roof overhang. A pre-Dash 2 having that seems very unlikely.

                B-Dubya out -

                --------------------------------------------------------------------------------

                Modelling the Cape Breton & Central Nova Scotia Railway in HO

                Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!
                B-Dubya out -

                --------------------------------------------------------------------------------

                Modelling the Cape Breton & Central Nova Scotia Railway in HO



                Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!

                Comment


                • #9
                  Wow. It sounds real easy. I will have to print the topic. Hopefully if I ever see another GP on the CSX line near my house I will be able to remember what to look for. Thanks everyone for the help.
                  If the builders plate doesn\'t say ALCO.

                  Its not a real locomotive!

                  Comment


                  • #10
                    quote:



                    - Blomberg B trucks, with one brake cylinder and one snubber (shock absorbers, if you like) on each sideframe. As opposed to Blomberg M's with two brake cylinders on each sideframe and no snubbers (like GP9's and F7's)



                    id=quote>id=quote>
                    You have 'B' and 'M' reversed here. 'B's came on GP7/9/18.... 'M's were dash2 OPTION.

                    Nigel

                    Nigel F. Misso
                    Nigel F. Misso

                    Comment


                    • #11
                      Folks,

                      I have a picture of a Burlington Northern SD40-2 that was rebuilt after a wreck with an SD45 long hood. The engine number is 7023. this unit is not to be confused with the BN SD40-2's that were modified with flaired radiators when they were converted to use refrigerated liquid methane. Sometime the railroads will do something that will really confuse you....

                      Robert

                      CEO of the Pacific Southern Ry.

                      Robert C. Werth Jr.
                      Robert C. Werth Jr.

                      Comment


                      • #12
                        quote:


                        You have 'B' and 'M' reversed here. 'B's came on GP7/9/18.... 'M's were dash2 OPTION.



                        id=quote>id=quote>Are you sure about that? I was certain that the designations were "backwards" alphabetically, because they actually stand for something and aren't simple serials.
                        What they stand for, I don't recall, but I know the first Blomberg (on the FT) was the "F".

                        B-Dubya out -

                        --------------------------------------------------------------------------------

                        Modelling the Cape Breton & Central Nova Scotia Railway in HO

                        Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!
                        B-Dubya out -

                        --------------------------------------------------------------------------------

                        Modelling the Cape Breton & Central Nova Scotia Railway in HO



                        Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!

                        Comment


                        • #13
                          As Don stated not all GP40-2s had the shock absorbers.The Chessie GP40-2s DID NOT have a shock absorber on the trucks.These are now the in the 6000 numbers on the CSX. The Conrail GP40-2s also lack the Shock absorbers.So,the shock absorber as a rule can not always be used as a spotting feature.

                          There is a book that has all the railroads rosters,it more of a field guide to the types of locomotives types by number.I have noticed alot of railfans carry this book with them.

                          Does anybody know the name of this book,I believe it is called "All Time Railroad Rosters". This book also covers short lines as well as the lease units.

                          You may want to check under the number, as sometimes you will see the locomotive make. like this

                          6124

                          GP40-2

                          I hope this helps.


                          Larry

                          Comment


                          • #14
                            quote:


                            So,the shock absorber as a rule can not always be used as a spotting feature.


                            id=quote>id=quote>True, but if you see 2 or more of the 4 big features (roof overhang, snubber on the trucks, sight glass, bolted battery box covers ahead of the cab), you can be fairly sure that it's a Dash-2. If you see one of them, it's probably some sort of rebuilt "straight" 38 or 40.
                            Of course, the SD40-2 and SD45-2 are a snap to tell from their "straight" cousins. Dontcha wish life was always that simple?

                            B-Dubya out -

                            --------------------------------------------------------------------------------

                            Modelling the Cape Breton & Central Nova Scotia Railway in HO

                            Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!
                            B-Dubya out -

                            --------------------------------------------------------------------------------

                            Modelling the Cape Breton & Central Nova Scotia Railway in HO



                            Inside every GE is an Alco trying to get out...apparently, through the exhaust stack!

                            Comment


                            • #15
                              The only positive way to tell a -2 it the roof overhang slightly to the rear and the battery box doors. On the dash 2 the door extends slightly under the cab.

                              Very easy spotting features no matter what side of the engine you're on.
                              Larry

                              Comment

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