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Knucklehead overhead oil lines

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  • Knucklehead overhead oil lines

    Here are 2 OEM overhead oil lines for 1942 and up Knucklehead. The one on the left is steel lines with a brass 'T' and the one on the right is copper lines with a steel 'T'. Anyone know what the deal is with them. I have several examples of each type. Years ago I had heard that copper oil lines were replacements.

    Jerry


  • #2
    Copper oil and gas lines were standard until 1941. War production changed them to steel. Your copper lines may be post war. Owners of original machines need to see what they have on theirs.
    Be sure to visit;
    http://www.vintageamericanmotorcycles.com/main.php
    Be sure to register at the site so you can see large images.
    Also be sure to visit http://www.caimag.com/forum/

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    • #3
      Originally posted by Chris Haynes View Post
      Copper oil and gas lines were standard until 1941. War production changed them to steel. Your copper lines may be post war. Owners of original machines need to see what they have on theirs.
      Chris, do you mean the copper lines may be pre-war?

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      • #4
        lines

        Wasn't 1940 the last year for banjo oil lines on the upper end?
        DrSprocket

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        • #5
          37 was the last year of banjo fittings on the oil tank
          Last edited by flat-happy; 07-30-2009, 09:57 PM.

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          • #6
            Rich,
            The part number on the lines with flare fittings is -42, the banjo style is -36. And my original '41 parts book only lists the early style from '36-'41.
            Robbie
            Robbie Knight Amca #2736

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            • #7
              Can you bend Brass lines like that?
              Maybe the lines are Copper or steel.
              I could understand the 45 degree fitting and the nuts being brass.
              I dont know that brass would put up with that type of treatment?
              Last edited by Steve Little; 07-30-2009, 09:27 PM.
              Steve Little
              Upper Yarra Valley. Victoria.
              Australia.
              AMCA member 1950

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              • #8
                Steve,
                Where did you come up with brass??
                Robbie
                Robbie Knight Amca #2736

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                • #9
                  Rub
                  My goof.
                  I re read it and tried to delete it but ya beat me on the draw
                  Steve
                  Steve Little
                  Upper Yarra Valley. Victoria.
                  Australia.
                  AMCA member 1950

                  Comment


                  • #10
                    Banjo lines were used on the top end oiler through 1941. To my knowledge all H-D oil and fuel lines prior to 1941 were copper.
                    Be sure to visit;
                    http://www.vintageamericanmotorcycles.com/main.php
                    Be sure to register at the site so you can see large images.
                    Also be sure to visit http://www.caimag.com/forum/

                    Comment


                    • #11
                      Originally posted by Rooster View Post
                      Chris, do you mean the copper lines may be pre-war?
                      Pre war lines were copper. But the compression fitting top enf oil line was not used untill 1942 when all lines were being made of steel because of the war. The copper compression fitting line may be a post war item.
                      Be sure to visit;
                      http://www.vintageamericanmotorcycles.com/main.php
                      Be sure to register at the site so you can see large images.
                      Also be sure to visit http://www.caimag.com/forum/

                      Comment


                      • #12
                        copper oil lines

                        i am the the 2nd owner of my 47el owned since 1960 this machine has copper oil lines with brass y fitting and steel nuts and copper fuel xover with steel nuts i doubt very much they were replaced andy

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