Allen Scythe access to clutch

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  • October 6, 2021 at 4:44 pm #38018
    rowan-bradley
    Participant

    The dog clutch on my Allen Scythe seems to have jammed. To get access to this I guess that I have to remove the Axle Guard, which is fitted on my machine. How do I do this? Do I have to remove the wheel? I hope not, since I gather from chat about this machine that this can be a tad difficult.

    Thank you – Rowan

    October 7, 2021 at 8:23 am #38023
    charlie
    Keymaster

    I am not familiar with the internal workings of Allen Scythe but I do have an instruction manual with parts list in my literature collection. Looking at the illustration on page 25 it would appear the clutch mechanism on the model T is inside the gearbox, see photo below.
    If you send me a personal message with your e mail address I can email the full manual to you.

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    October 7, 2021 at 2:37 pm #38027
    rowan-bradley
    Participant

    Thanks for your reply. I have the manual too, but I find it difficult from the drawings provided to see exactly where the dog clutch is. I will attempt to take the top of the gearbox off, if this proves not too difficult. Does anyone know whether there should be a gasket between the top and bottom of the gearbox? What material should it be made from? Does anyone sell them? Or can I get one made for me? Does anyone have a CAD file for the gasket?

    Thank you – Rowan

    October 8, 2021 at 7:37 am #38032
    charlie
    Keymaster

    The dog clutch consists of parts 372 and 374 operated by 382 which slides 374 in and out of mesh with 372.

    October 8, 2021 at 4:48 pm #38037
    rowan-bradley
    Participant

    Yes, I get that, but can you please explain which bits are inside the gearbox and which outside? Presumably the operating rod must enter the gearbox via some kind of oil seal or gland? Part of my trouble is that my machine is fitted with the axle guards which means that I can’t see any of this.

    Thanks – Rowan

    October 9, 2021 at 7:36 am #38040
    charlie
    Keymaster

    Yes you will need to remove the guards to see what you want.

    October 9, 2021 at 3:43 pm #38046
    rowan-bradley
    Participant

    To do that, do I need to remove the wheels? Or can the guards be removed without removing the wheels in some way (without destroying them)?

    Thanks – Rowan

    October 21, 2021 at 9:34 am #38099
    rowan-bradley
    Participant

    I have concluded that I need to remove the wheel. The current challenge is to remove the gib key. I am going to try using a wedge under the head of the key, and if that doesn’t work, I’m going to make a special puller. Lots more fun!

    Thanks – Rowan

    December 4, 2021 at 9:05 am #38299
    kevm
    Participant

    You don’t need to remove the wheel and getting the gib key out could be a whole lot of unnecessary hassle.
    Just remove the guard and clean up the clutch mechanism there is not a lot that can go wrong with the actual dog clutch inside the gearbox.

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