490 stewart warner repair

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Model T Ford Forum: Forum 2013: 490 stewart warner repair
Top of pagePrevious messageNext messageBottom of page Link to this message  By earl s hopkins on Wednesday, July 03, 2013 - 02:32 pm:

there is no square drive in end of speedo


Top of pagePrevious messageNext messageBottom of page Link to this message  By James A. Mahaffey on Wednesday, July 03, 2013 - 03:08 pm:

earl,

There were two Stewart 490 speedometer heads made. The 1926 model had no male screw-mount for the cable. The cable mounts with a small, off-set screw-socket. The 1927 had a more conventional screw-mount for a threaded collar on the cable. Which one do you have? A photo would help a great deal.

Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By earl s hopkins on Wednesday, July 03, 2013 - 04:47 pm:

this is a 1926 the cable slips inside the head. the speedo has a round hole is there a square insert. or is the hole striped.


Top of pagePrevious messageNext messageBottom of page Link to this message  By James A. Mahaffey on Wednesday, July 03, 2013 - 05:48 pm:

There should be a square socket for the cable-end. Is the square key on the end of the cable fully inserted? I can't imagine the cable having enough force to strip out the hole all the way down, but if the cable is slightly too short, like 1/4 inch, it can slip in the end of the socket and eventually make it round.

To make mine work right, I had to insert a 1/2-inch shim (a piece of steel rod) into the drive-head socket to make the cable engage the square socket in the speedometer head correctly and make it turn. When it turns, the cable has a natural tendency to run away from the speedometer and hit the stop in the drive-head.

Jim


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