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  1. #1

    Alternator Rebuild

    I posted a few days ago about a regulator issue, which is still hounding us. Runs fine when cold, then slips into an over-charging mode when warmed up.

    Rather than just replace the regulator, I'm thinking it might be worth having the whole alternator rebuilt. Since I'm leaving town for an undeterminend amount of time in the AM, I want to leave the boat in a run-able condition, which leads me to some questions:

    Is my assumption that each engine alternator's charge is directed to one battery bank?

    If I remove the port alternator, is it actually the port bank I'm removing the charge from?

    If I pull the belts, secure and tape off the wires to prevent grounding, are there any other considerations toward leaving the boat in an operational state should she have to be moved?

    TIA,
    Ed G.
    Misty
    '68 41C
    Sanctuary
    '80 58 Motoryacht
    100 Ton Master, Near Coastal
    http://www.boat-heaters.com

  2. Re: Alternator Rebuild

    1. Generally (if OEM), yes.

    2. Yes, normally.

    3. Nope. And if you have a combiner or AC charger, and its up (e.g. genset running) that bank will get charged. Mechanical Detroits do not reuqire power to run; they will run quite happily with a totally flat battery bank and no DC power whatsoever (this I have taken advantage of when I had a massive short offshore that took out my starboard side electrical several years ago - the engine didn't know what happened, although I had no electrical gauges on that side....)
    http://www.denninger.net - Home page with blog links and more
    http://market-ticker.org - The Market Ticker

  3. #3

    Re: Alternator Rebuild

    Ed is there no auto electric shop in the area? I usually bring it in and have it back in a day. Some newer stuff the have on the shelf waiting for you and they only need to add the pulley.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    Marine Electronics and Electrical Products Distributor.

  4. #4

    Re: Alternator Rebuild

    Quote Originally Posted by Boatsb View Post
    Ed is there no auto electric shop in the area? I usually bring it in and have it back in a day. Some newer stuff the have on the shelf waiting for you and they only need to add the pulley.
    I'm sure there is, and I'm hunting. Florida Detroit Diesel doesn't stock them but gave me someone to try. If I can get one today, great, but I'm heading out in the morning, and Ang will have to plan to take time off to get the part and then scare up some local help to install it (that sucker's big), hence the planning for some down time before I actually remove it.
    Ed G.
    Misty
    '68 41C
    Sanctuary
    '80 58 Motoryacht
    100 Ton Master, Near Coastal
    http://www.boat-heaters.com

  5. #5

    Re: Alternator Rebuild

    Belts? My 92 series has the alternator mounted on one of the back accessory gear drives. Maybe you have a different step on Sanctuary, but if not, you will have an open gear drive once you take off the alternator.
    Sky Cheney
    1985 53EDMY, Hull #CN759, "Rebecca"
    ELYC on White Lake--Montague, MI

  6. #6

    Re: Alternator Rebuild

    Well, some idiot painted over the ID plates, on both of them...no way to read the numbers off of them that the shop needs to match them up.....

    On these engines, they are mounted on the front, with twin belts driving them.
    Ed G.
    Misty
    '68 41C
    Sanctuary
    '80 58 Motoryacht
    100 Ton Master, Near Coastal
    http://www.boat-heaters.com

  7. #7

    Re: Alternator Rebuild

    I would pull it and run down to a shop. Chances are a good shop can have you going in 2-3 hours.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    Marine Electronics and Electrical Products Distributor.

  8. #8

    Re: Alternator Rebuild

    OK, guess what's not made any longer? 32v rebuild parts for Delco alternators!

    We're just going to have to take it in, see if it can be repaired, and if not, buy one of the alternatives.

    Fortunately, it's not a difficult job to pull it, and it wasn't as heavy as it looked, so it should be pretty easy to get the new one in.
    Ed G.
    Misty
    '68 41C
    Sanctuary
    '80 58 Motoryacht
    100 Ton Master, Near Coastal
    http://www.boat-heaters.com

  9. #9

    Re: Alternator Rebuild

    Anyone ever heard of Leece Neville Alternators? This, and Dixon were mentioned as alternative suppliers for a replacement.
    Ed G.
    Misty
    '68 41C
    Sanctuary
    '80 58 Motoryacht
    100 Ton Master, Near Coastal
    http://www.boat-heaters.com

  10. #10

    Re: Alternator Rebuild

    Quote Originally Posted by egaito View Post
    Anyone ever heard of Leece Neville Alternators? This, and Dixon were mentioned as alternative suppliers for a replacement.
    We have used Leece Neville on our heavy equipment for years. They are equally as good as the Delco.
    Sky Cheney
    1985 53EDMY, Hull #CN759, "Rebecca"
    ELYC on White Lake--Montague, MI

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