Dear enrique442,

Hope you're well. The 100-Amp Nippondenso alternator (Volvo #3544119 > #5003807) was standard on all post-1990 740 and 940 normally-aspirated cars sold in North American markets. The 100-Amp unit replaced an 80-Amp unit. Cars with turbo-equipped engines seem to have been equipped with a Bosch alternator (Volvo #9447865).

Parts for the Nippondenso alternator may be had from Barsanco, a firm in Michigan. I believe the following link is to the correct brush for your alternator, see: http://www.barsanco.com/part/217-510.html .

Barsanco's site shows this part as available. The specifications for this brush:
Nippondenso Brush (FA-140)Nippondenso Units) 12 Volt *** 15mm Length *** 7mm Width *** 5mm Height *** 48mm Lead Length.

Call Barsanco at 1-800-421-3374 or e-mail at info@barsanco.com to confirm fitment and availability. I've not done business with Barsanco, so do not know how whether they sell to retail customers.

Please post back with your findings.

Hope this helps.

Yours faithfully,

Spook

Hi Eric,

Ampere-wise 80A or 100A doesn't make much a difference for normal engine operation except maybe when you simultaneously use high current equipments like headlights + foglight + AC + blower (+ seat and side mirror heater too if you have it).


Unless you have another car to use by you'd need to replace your alternator ASAP or you'll keep draining the battery. In my experience, my 1994 940 Bosch car is only good for about 1 hour of driving to look for alternator shop before it runs out of power (this with AC + blower + headlights = Off).


If you have another car to use by you have the time to search/order for a new set of brushes for the Denso. If you have automotive electrician (those repairing starters/alternator/headlight/tail light wiring etc) at your township you could dismantle your alternator bring it over to the shop and have it fixed within a few hours. Otherwise ordering online would take a few more days.


If you plan to get a Bosch alternator make sure the mounting and wiring points are the same. Some Bosch use female spade connector for the D+ terminal, some use ring terminal. But these only require minor modification.


Alternator's depth (front to back dimension) is another thing to consider if you have AC. You may have AC pipes (from the compressor) running close to the back of your alternator. Yes you may use larger diameter drive belt to get it clear of the pipes but soon you'll be out of adjustment range. Get the right replacement in the first place to avoid all these. Otherwise there's not much else to consider for the conversion.


Regards,
Amarin.

greetings,

Thank you aleekat, KlausC, and rstarkie for your help!
Very good information and links!!!
I will check the brushes and see if I can find some new ones!

Also, would a 100 amp Bosch alternator(It is bigger than the Denso.) fit in the place of the Denso on the 940? Some info in one of the links made a reference to doing this.

blessings!
Eric

As noted they are interchangeable.

Have a look at the brushes:

https://www.brickboard.com/RWD/volvo/1470276/denso_alternator_brush_set_replacement_pictorial.html

Good luck,
Randy

Did you take the back of the alternator off and check the brushes on the voltage regulator? Much cheaper than replacing the alternator.
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Keeping it running is better than buying new

Doesn't matter. Previous owner could have replaced it from a pull a part.
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Post Back. That's whats makes this forum work.