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Thread: 300tdi alternator wailing

  1. 1st January 2019, 03:38 PM #1
    Don 130's Avatar
    Don 130
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    300tdi alternator wailing

    As above, my alternator is unhappy, and stiff to turn by hand. Is this someting I get and fit new bearings for, or do I buy another. This is my going to work chariot, so the least time off the road the better. Thanks for any advise, and a happy new year to all.
    Don.
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  2. 1st January 2019, 03:55 PM #2
    jboot51
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    If it is the original 70 amp defender alt then the bearing at the rear cant be changed.
    If it has been upgraded with a 100 amp disco alt the yes the bearings are doable
    '95 Defender 130 Single Cab
    HS2.8 TGV Powered
    ------------
    98% of all Land Rovers built are still on the road.
    The other 2% made it home.

    Cost difference between Britpart and Genuine seals: £2.04. Knowing that your brakes won't fail at any moment: Priceless.
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  3. 1st January 2019, 07:42 PM #3
    Don 130's Avatar
    Don 130
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    Thanks, Jboot, I'll get one ordered in the morning and hope it all holds together still I can change it over. By the way, what is the advantage of the disco one? higher amperage, but what does that achieve?
    Don.
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  4. 1st January 2019, 07:47 PM #4
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    It will depend on what electrical loads you have or need, 100A is better than 70A.
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  5. 1st January 2019, 08:43 PM #5
    jboot51
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    If you get the disco alternator you will need a disco belt, as the pulley is smaller.

    As 4bee said, its the load connected.
    I had dual Lifeline batteries which absorbed 90 amps combined for about 30 seconds after starting the engine.
    Didn't think a short term overload would hurt.
    The 70 amp finally needed bearings and when I pulled it down the rotor had been overheated,discoloured.
    '95 Defender 130 Single Cab
    HS2.8 TGV Powered
    ------------
    98% of all Land Rovers built are still on the road.
    The other 2% made it home.

    Cost difference between Britpart and Genuine seals: £2.04. Knowing that your brakes won't fail at any moment: Priceless.
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  6. 1st January 2019, 09:46 PM #6
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    rangieman
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    You can swap the disco pulley to the Defender then you retain the Defender belt
    Easy to do with a rattle gun air or electric
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  7. 2nd January 2019, 04:27 AM #7
    jboot51
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    Quote Originally Posted by rangieman View Post
    You can swap the disco pulley to the Defender then you retain the Defender belt
    Easy to do with a rattle gun air or electric
    Yes, so they say.
    My defender pulley was tappered,
    Brand new disco alt had a keyway, no swapping was going to work.
    '95 Defender 130 Single Cab
    HS2.8 TGV Powered
    ------------
    98% of all Land Rovers built are still on the road.
    The other 2% made it home.

    Cost difference between Britpart and Genuine seals: £2.04. Knowing that your brakes won't fail at any moment: Priceless.
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  8. 2nd January 2019, 05:50 AM #8
    Red90
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    There are different model alternators so it matters which one you get.
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  9. 2nd January 2019, 09:00 AM #9
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    weeds
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    I just went with Disco Belt......
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  10. 2nd January 2019, 02:51 PM #10
    Don 130's Avatar
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    Thanks all, I ordered a Disco 100 amp job this morning, along with a Disco belt. We'll see what happens when the gear turns up. I hope it all fits. The mob I ordered from didn't have a Defender one in stock, and my usual supplier didn't answer the phone, even though the web suggested they would open their doors at 8:30 this morning.
    I'll swap the pulley and retain the Defender belt if possible, to avoid future confusion.
    Don.
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