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'40 non working speedo.

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  • '40 non working speedo.

    The speedo and gas guage just don't work on my '40. It's weird because they all still light up, but the needles in the gauges don't move at all. The lights also never shut off, even with the key out. I did figure out how the front and tail lights go off, but haven't tried the dash yet. I just want to know what to expect when I look at the gauges. Any suggestions would really help. This is another one of those things I have never worked on before. Thanks in advance!

    Chris Dresbach

    1940 Champion two door.
    Parts of the 1952 Model N
    1960s Prototype cart
    Chris Dresbach

  • #2
    I found this with the couple of vehicles I have. First I would make sure the speedo is lubed and functioning. That usually involved unhooking it from the back and giving the end that spins a good twirl with the fingers. After that I got underneath and unhooked the plate from the rear that attaches the cable to trans and pulling out the cable and gear. Believe it or not I've found speedo gears missing from the back of the trans when I took out the plate. If the gear is there, I gave that a twirl with the fingers to see if there was anything from the speedometer. If there wasn't any movement(this is after the cable was hooked back up to the speedometer), odds are the internal core was broken inside the cable, necessitating a replacement cable or core.

    [IMG=left]http://i158.photobucket.com/albums/t102/PlainBrownR2/55%20Studebaker%20Commander%20Streetrod%20Project/P1010531-1.jpg[/IMG=left]
    [IMG=left]http://i158.photobucket.com/albums/t102/PlainBrownR2/55%20Studebaker%20Commander%20Streetrod%20Project/P1010550-1.jpg[/IMG=left]
    [IMG=right]http://i158.photobucket.com/albums/t102/PlainBrownR2/Ex%20Studebaker%20Plant%20Locomotive/P1000578-1.jpg[/IMG=right]
    [IMG=right]http://i158.photobucket.com/albums/t102/PlainBrownR2/My%201964%20Studebaker%20Commander%20R2/P1010168.jpg[/IMG=right]

    1964 Studebaker Commander R2 clone
    1963 Studebaker Daytona Hardtop with no engine or transmission
    1950 Studebaker 2R5 w/170 six cylinder and 3spd OD
    1955 Studebaker Commander Hardtop w/289 and 3spd OD and Megasquirt port fuel injection(among other things)

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    • #3
      Chris,
      Usually this will be the speedo gear or cable. Examine both ends and the problem should be obvious. NAPA has a repair kit for the cable and the proper graphite lube. There is an oil cup on the top of the speedometer (it is a pain to get to) for the bearings in the speedometer but that will just make it run rough.

      There is a procedure in the manual to test the fuel gauge. It is pretty simple but I don't have it in front of me right now.


      Nathan

      _______________
      http://stude.vonadatech.com
      _______________
      http://stude.vonadatech.com
      https://jeepster.vonadatech.com

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      • #4
        The lights in the gauges have nothing to do with the functionality of the gauges themselves as they are simply little light bulbs with a negative wire and a positive wire. The speedo cables become stiff with age and it may have broken inside the flex tube. The gas gauge may simply be a corroded ground wire on the tank sending unit. An easy remedy for this is to stick a clean stick down the filler tube in order to measure the depth of gasoline.


        A wild Red Hawk admiring it's reflection.
        In the middle of Minnestudea
        sigpic
        In the middle of MinneSTUDEa.

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        • #5
          If the 40 champion is like the 40 commander and president, the gauge lights turn on with a separate switch from the head lights. It would be on the right of the radio grill. turn it counter clockwise to shut off the instrument illumination. The switch on the left of the grill is for headlights and parking lights but does not turn on the instrument lights.

          28 dictator
          40 commander
          28 dictator
          40 commander

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          • #6
            Chris, you may also find things like this:



            This was one reason Barney's speedo didn't work. Driven gear was installed improperly and just got chewed off by the drive gear. You never know what you'll find once you start looking


            [img=left]http://members.cox.net/clarknovak/lark.gif[/img=left]

            Clark in San Diego
            '63 F2/Lark Standard
            http://studeblogger.blogspot.com
            www.studebakersandiego.com

            Clark in San Diego | '63 Standard (F2) "Barney" | http://studeblogger.blogspot.com

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            • #7
              Next question, what is the correct gear? We figured out the problem, it didn't have a gear like the one pictured, at all! It was just gone![B)] We replaced it and oiled the speedo gauge and greased the cable, but since I don't have the shop manual yet, I don't know if it is the right part. It has 600x16 tires and the rear end is stock. I don't know the size, but it's origional. If anybody that has the book could look this up real quick and post the part number or size, that would be great.

              Chris Dresbach

              1940 Champion two door.
              Parts of the 1952 Model N
              1960s Prototype cart
              Chris Dresbach

              Comment


              • #8
                2G Champion no o/d 4.10 rear axle ratio driven gear (on cable)Stude # 197468 Stewart Warner #SW101236 6 teeth, pinion (drive)gear Stude #197469, SW # SW101239 19 teeth, or Stude # 197470 SW#101238 18 teeth

                With o/d driven gear Stude #191669, SW #SW96764, 5 teeth, drive gear Stude # 195502, SW# SW99236 16 teeth.

                4.56 rear axle ratio no o/d driven gear 196918, SW100808, 4 teeth, drive gear 196941, SW100824 14 teeth.

                With o/d driven gear 196314, SW100807 4 teeth, drive gear 196941, SW100824 14 teeth.

                Terry

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                • #9
                  quote:Originally posted by dictator27

                  2G Champion no o/d 4.10 rear axle ratio driven gear (on cable)Stude # 197468 Stewart Warner #SW101236 6 teeth, pinion (drive)gear Stude #197469, SW # SW101239 19 teeth, or Stude # 197470 SW#101238 18 teeth

                  With o/d driven gear Stude #191669, SW #SW96764, 5 teeth, drive gear Stude # 195502, SW# SW99236 16 teeth.

                  4.56 rear axle ratio no o/d driven gear 196918, SW100808, 4 teeth, drive gear 196941, SW100824 14 teeth.

                  With o/d driven gear 196314, SW100807 4 teeth, drive gear 196941, SW100824 14 teeth.

                  Terry
                  Thanks.
                  Chris Dresbach

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