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MP5 gearbox lock up

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  • 27-12-2008 7:33pm
    #1
    elsi
    Closed Accounts Posts: 149 ✭✭


    my galaxy mp5k gearbox is givin me nothing but hassle.
    iv shimmed it properly, got the trigger spring in, tested the gears syncronisation by turning them over with no spring in, put a lower tension spring in......
    but when i test her then the piston locks in the rear position.
    its not the battery or the motor.

    if anybody has any ideas, im all ears.

    thanks


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    #2
    sean.carolan100
    Registered Users Posts: 632 ✭✭✭sean.carolan100


    Urgg i'm an idiot when it comes to these things ...and alot of other things..... but i'm pretty sure its something to do with an anti-reversal swithc ....... I think :D


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    #3
    elsi
    Closed Accounts Posts: 149 ✭✭elsi


    Nah i have it sorted out now. Dont know why i posted this up here.


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    #4
    coys
    Closed Accounts Posts: 144 ✭✭coys


    I'm having the same problem at the moment (with an M4) could you pretty pretty please dsclose how you fixed it because I'm stumped:confused::confused:


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    #5
    Masada
    Banned (with Prison Access) Posts: 11,001 ✭✭✭✭Masada


    The OP's sounds like a trigger contact or selector plate prob, but the M4 doesnt have the same kind of trigger so might be a different problem.,


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    #6
    elsi
    Closed Accounts Posts: 149 ✭✭elsi


    a combination of a missing shim and the anti-reversal latch being out of sync with the gears.

    gbox1pd7.jpg

    basically the stud on the uppermost gear(circled), must be positioned at 1o'clock when the anti-reversal latch is engaged in one of the 4 "lock" positions.


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    #7
    Masada
    Banned (with Prison Access) Posts: 11,001 ✭✭✭✭Masada


    Ah so thats where you went wrong.,

    it doesnt actually have to be at the 1o'clock position, once its not touching the tappen plate and the teeth arnt engaging the sector gear, so baically 1-5 o'clockish will do ya., :)


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    #8
    sean.carolan100
    Registered Users Posts: 632 ✭✭✭sean.carolan100


    elsi wrote: »
    a combination of a missing shim and the anti-reversal latch being out of sync with the gears.

    gbox1pd7.jpg

    basically the stud on the uppermost gear(circled), must be positioned at 1o'clock when the anti-reversal latch is engaged in one of the 4 "lock" positions.
    Yeah yeah ....Thats what I meant :D


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