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  #1  
Old 03-12-2007, 12:43 PM
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348 alternator removal & rebuild

Okay guys, I recently removed and rebuilt the alternator in my 348. F-Chater jm3 rebuilt the alternator in his 355 using updated parts. Here is the thread were he listed the parts he used http://ferrarichat.com/forum/showthr...hlight=transpo

The old Transpo regulator (part #IN220) has a tendancy to go bad, and I think they are a piece of junk. I had the alternator rebuilt a few years ago and the shop that rebuilt it used the standard Transpo parts and they ended up failing on me again. The battery light would also come on when I would get into the upper rpm's. Well since the alternator crapped out on me I wrote down the part numbers that jm3 used on his rebuild and went to the the alternator shop to order them.

Here are the Regitar part numbers:

regulator - #VRH2005-4A
rectifier - #RN-02

Well when I ordered them the supplier to the shop told them that a company named USI made a better regulator than the Regitar. Not that the Regitar was a bad regulator but that the one USI made was just better. So I figured why not and ordered the USI regulator. That way we have two alternatives to choose from over the crappy Tranpso part. I still used the Regitar rectifier though.

Here is the USI part number:

regulator - #00632, 71-30003/SCP

Unit2 electric in Ventura was a big help in getting the parts for me.

Since I had all the stuff I figured you guys would like a how-to on the removal and rebuild, and yes I did take pictures. Oh yeah one more thing, this is for the Nippondenso alternator, so you can use the parts for a 348 or a 355.

Last edited by ernie; 03-12-2007 at 01:06 PM.
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Old 03-12-2007, 12:45 PM
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Removal Step 1

Total removal time is about 30 minutes. I took me 50 minutes, but that was because I was screwing around with the camera so much, trying to get the best shots for you guys.

Okay now for the rebuild.

Last edited by ernie; 03-12-2007 at 01:21 PM.
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Old 03-12-2007, 12:52 PM
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Step 2

Now what you are going to do is remove the connector from the back of the alternator.
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Old 03-12-2007, 12:55 PM
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Step 3

Then remove the nut that holds the cable, that runs to the alternator, on to the back of the alternator, and remove the cable.
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Old 03-12-2007, 12:58 PM
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step 4

Now you are going to loosen the retaining bolt on the front of the alternator belt tensioner bearing.
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Old 03-12-2007, 01:01 PM
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Step 5

Next you will loose the the tension on the alternator belt via the tensioner bolt on the bottom of the bearing bracket.
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Old 03-12-2007, 01:02 PM
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Step 6

Remove the alternator belt.
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Old 03-12-2007, 01:10 PM
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Step 7

Remove the nuts on the top and bottom retaining bolts, but don't remove them yet.
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Old 03-12-2007, 01:13 PM
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Step 8

Now be sure to support the bottom of the alternator, then remove the bolts. The bolts slide out from the back, towards the engine not the firewall.
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Old 03-12-2007, 01:16 PM
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Step 9

Remove the alternator from the bottom.
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Old 03-12-2007, 01:20 PM
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Total removal time is about 30 minutes. I took me 50 minutes, but that was because I was screwing around with the camera so much, trying to get the best shots for you guys.

Okay now for the rebuild.
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Old 03-12-2007, 01:24 PM
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Rebuild Step 1

Remove the double nuts that are on the rectifier bolt, and remove the plastic guard.
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Old 03-12-2007, 01:28 PM
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Step 2

Remove the 3 nuts, and the screw, that hold the cover onto the back of the alternator.
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  #14  
Old 03-12-2007, 01:31 PM
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Step 3

Remove the cover, to expose the insides of the alternator, and step it aside. Be careful not to loose the little washers that are on the three bolts, you removed the nuts from earlier.
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Last edited by ernie; 03-12-2007 at 01:34 PM.
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  #15  
Old 03-12-2007, 01:36 PM
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Step 4

Now remove the four screws that attach the rectifier to the alternator.
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Old 03-12-2007, 01:39 PM
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Step 5

Remove the rubber cover for the brushes, and the two screws hold the brushes on.
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Old 03-12-2007, 01:42 PM
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Step 6

Remove the screws holding down the regulator.
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  #18  
Old 03-12-2007, 01:45 PM
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Step 7

Remove the brushes.
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Old 03-12-2007, 01:47 PM
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Step 8

Remove the regulator.
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  #20  
Old 03-12-2007, 01:48 PM
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Step 9

Remove the rectifier.
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