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Thread: Alternator Upgrade : Nippondenso 90/120/140/etc Amp

  1. #26

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    OK I took out the old alternator and started to try to install the new one. I have the feeling I have to eat this alternator and buy another, but not yet. First pic is of the regulator and pigtail for a 73 Plymouth Duster.

    The shaft on the 45 amp is smaller, 5/8. The new one is 11/16, so the short bushing off the 45 amp won't work to let the pulley ride on the new one. So I need a new v belt pulley bushing or pulley if the newer ones aren't two piece and have a similar set up to the serpentine pulley.

    Next the pivot bolt is 1/4 inch as is the hole through the motor. The holes for the pivot are two sizes, 3/8 and the one with the bushing in the picture is 1/2. How have folks been coping with that?
    The top bolt hole is 3/8. You'll need an 1.5" 3/8 bolt with washer and nut for the adjuster. The single bolt on my 45amp won't work.
    Except for these annoying but critical differences the sizes look and measure the same. That's 7 inches between pivot and adjuster bolt.
    Can't think of anything else right now.
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  2. #27

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    How are these retrofits holding up for you all?

  3. #28

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    So I was looking for unthreaded slotted spacers. I called and went to several places. No one could help. At the last place the guy, cutting on a huge vertical band saw outside, looks over the alternator and listens to me. Then he says wait a minute. He was gone so long I thought he was pulling my leg. Then he comes out and he has that piece of copper. He told me to take it. It took me a bit to work it out but by the time I got home it sunk in. The OD of the tube was just over 10mm the size of the existing holes. The through bolt is 8mm. Sure enough I cut the tube and it worked. I had to cut it two thicknesses of the cutting wheel on my grinder. Then I cut off the extra spacer that came with it.
    I installed it and hooked up the wires and now all I need is to find a V pulley for it. Then I can find out if it works
    I will eventually move the mounting for the regulator.


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  4. #29

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    A low tech solution on a zero dollar budget that works - uber win Fingers crossed it lines up and does it's thing without headaches.
    support the forum that supports you - join and donate to MightyRam50.Net today! donations unlock the edit function

  5. #30

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    Quote Originally Posted by geezer101 View Post
    A low tech solution on a zero dollar budget that works - uber win Fingers crossed it lines up and does it's thing without headaches.
    Best kind of solutions are free. This place never answered me so I pulled the trigger and they charge just $2 less than the price of the item to ship it! I read the return policy and now I know why the never responded, they deduct the shipping fee from your payment on returns. So I mentioned this in my note https://store.alternatorparts.com/24...ternators.aspx It looks right but that shoulder height might be off. Maybe I can use a washer?

    Note- The spacers did not make it stiff but it did tighten up with no play once I wrenched bolt on. It wouldn't have done that without those home made spacers. I think that was a 1/2" tube of potable water pipe, as it was bent and soft. That stuff has thicker walls than off the shelf hard copper pipe.

  6. #31

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    Still waiting for the pulley. I tore open the wiring harness and pulled the blue wire out of it and retaped the rest. It seems way too small to handle 90 amps. Anyway the heavy white wire runs to the + battery and the blue wire goes into the firewall on the driver side. It is spliced to power the reverse lights. Now if there is a problem I only have to chase it inside the cab and put in a heavier wire.
    I saw something on the pulley site. They sell kits for dodge external regulators. Theirs has a clip set up on the pigtail they supply as apparently there is an issue with the plug falling out. So I made one with tie wire.
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  7. #32

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    The alternator parts place was a bust. They never acknowledged my order until 6 days later, yesterday a Sunday when they are closed and it was back dated to last Tuesday. Today they finally responded to my email from Friday asking what was going on to tell me the supplier no longer has that part but they will provide me an excellent equivalent. I cancelled the order. That they did right away. They never did respond to my other email. They have 3 email addresses, they never responded to the info@ email I sent a question to. One an AOL account that comes with the PayPal receipt and two for the website. They may have more.

    Edit 9-27-20 bored watching the game (Man did Pollard screw up!) and waiting for parts and looked at RA under belt drive and they have a bunch of idler pulleys. I had thought that was just belts. I assume they are for an AC unit but they have the correct diameter center hole. Wasted two weeks. Oh well I have a double pulley due in this week. Now I know and whoever happens across this in a search does too.
    Last edited by 85Ram50; 09-27-2020 at 02:04 PM.

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