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Fitting an isolation switch on a tractor

  • 18-11-2022 9:54am
    Registered Users Posts: 820 ✭✭✭

    Looking to fit an isolation switch on a MF 390. Is there a certain kind to get?

    is it something that I can put on or a mechanics job?


  • Moderators, Society & Culture Moderators Posts: 12,616 Mod ✭✭✭✭blue5000

    Qtp make them, sorry sell them, have one on the fiat and it stopped working after a year. Resorted to a vice grip to hold 2 cables together. So avoid that brand. You might need some extra flat braid or cable along with it, make sure it’s heavy enough. Some people have them up in the cab, handy if you forget to turn it on, but I wouldn’t recommend running cables that far as you could have power loss.

    It should be doable yourself, put it on the earth fairly close to the battery is what’s normally done on a negative earth wiring system. What make of tractor is it?

    If the seat's wet, sit on yer hat, a cool head is better than a wet ar5e.

  • Moderators, Society & Culture Moderators Posts: 12,616 Mod ✭✭✭✭blue5000

    Sorry I see it’s a 390, is the battery up in front of the radiator? Should be a simple job to drill a hole in the tinwork above the battery, if there’s a loader on it make sure there’s room for the on off lever, it sticks out about 2 inches.

    If the seat's wet, sit on yer hat, a cool head is better than a wet ar5e.

  • Registered Users Posts: 820 ✭✭✭Sugarbowl

    Thanks for info. 2 batteries, 1 on either side under the door by the steps.

  • Registered Users Posts: 5,025 ✭✭✭zetecescort

    Might be worth getting a local garage or maybe a motor factors to properly crimp the fittings too and not just squeeze them in a vise. Nothing worse than poor connections

  • Registered Users Posts: 6,558 ✭✭✭zg3409

    I know nothing about tractors, but something like this is used on car batteries with round terminals. To fit it you disconnect negative lead, put this on, then connect old negative lead to the round end and job done. Unscrew green knob to disconnect, turn green knob to reconnect.

    This one is not heavy duty but I assume better ones are available from motor factors. Worth a try to see how it goes. As others say having a location you can easily get to might be better.

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  • Registered Users Posts: 831 ✭✭✭satstheway

    Ours was on the flat plate to the left of the sear when ur sitting on it. Opposite the handbrake. Great place. Your hand fell on it when u got in. Tractor I have now its outside mounted on a bracket off the engine block and Forget about it until I'm in the seat half the time.