Tach disassembly question - 1956 10EE square dial
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  1. #1
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    Default Tach disassembly question - 1956 10EE square dial

    While my lathe is running there is a very slight rubbing noise coming from the tach. Does anyone have any suggestions on disassembling the tach?

    I read Focus's thread,

    10EE Tach Repair: before and after

    and his parts picture is very detailed and his work is excellent, but his round dial tach is different from mine.

    I have the tach that only registers forward, nothing in reverse.

    img_0913-copy.jpg

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    His is only forward to round dials and square dials are the same except the input shaft is different on the square dials and is interchangeable.

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    Quote Originally Posted by bll230 View Post
    While my lathe is running there is a very slight rubbing noise coming from the tach. Does anyone have any suggestions on disassembling the tach?

    I read Focus's thread,

    10EE Tach Repair: before and after

    and his parts picture is very detailed and his work is excellent, but his round dial tach is different from mine.

    I have the tach that only registers forward, nothing in reverse.

    img_0913-copy.jpg
    What Ted said. AFAIK the dial is different, then a ratio change does the rest between 2500 top and 4000 top.

    One of my 10EE it is gone, but I have a complete one, shafts, gears, and all, from a part-out. IF I can find where I stashed it.

    There are a couple of NOS, NIB S-W "Marine-Diesel" tachos with 3500/4000 RPM top-end on their dials in my Hell box, but I didn't yet have the OEM one off the round-dial to do what I meant to do.

    See if the guts were the same.

    Given the NEW ones were only about 40 bucks, complete and there is a clock repairman's hand-puller around here too. If a hand and dial swap.. etc. Cheap repair.

    Otherwise, there are easily a hundred styles of auto aftermarket ANALOG ones to chose from, electric/electronic easily bi-directionally reading as well. LED/LCD one could drown in, so many out there. But I rate digital readouts near-useless for that tasking, much as analog would be on a DRO. Horses for courses.

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    I think I sent mine to Palo Alto Speedo repair. I believe they were made by Stewart-Warner, and the guts were dirt common and indestructible.

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    Quote Originally Posted by daryl bane View Post
    I think I sent mine to Palo Alto Speedo repair. I believe they were made by Stewart-Warner, and the guts were dirt common and indestructible.
    Fair description.

    Learnt it as a curious kid before I was old enough to drive off S-W parts scrounged out of a scrapped 1938 Packard HEARSE!



    But also labour intensive to repair. Partly because they WERE mass-produced dirt-cheap and nearly bullet-proof simple, so they don't have much in the way of formal provision for replaceable parts, alignment or the like.

    Which is why I figured to "fix" nuthin'.

    Just swap-in newly made, "en bloc" as less time of anybody's and less of it to be fairly paid-for, one-at-a-time human wages vs automated factory high-volume production unit costs.

    Discounted as obsolete stock, as well. About $40 each? Some only $25?

    Checked eBay? marine diesel tachometer


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