Jump to content

Alternator question (and may a stupid one)

Posted

Hey everyone, I hope all is well.

 

I currently have a Bosch alternator and even with the WT mod I am experiencing high AC ripple.  I plan to replace the alternator and am wondering if I can replace it with a Denso unit as they seem to be more plentiful than the Bosch units.

 

I also plan to keep my stock alternator and rebuild it with a new rectifier, bearings and brushes.  Has anyone rebuilt their Bosch alternator?  I'm curious if it is easy to do.  I have found a replacement rectifier online so they are available.

 

Thanks and I hope everyone has a happy Thanksgiving.

 

L8tr

d

 

  • Replies 22
  • Views 3.6k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Most Popular Posts

  • Tractorman
    Tractorman

    It would be interesting to see a photo of that fuse after that event occurred.  What you have described is indicative of a poor electrical connection at a precise location, the fuse stud.  It would al

  • Dieselfuture
    Dieselfuture

    Just put a denso in and forget about rebuilding your Bosch. You can even put a slightly higher amp 160? one from Durango I believe. I rebuild my Bosch it's not too bad. You'll need more than just

  • JAG1
    JAG1

    My second Original alternator just shorted out again. First one was the original ND, original to the truck at 222,000 roughly. Six months later an original Bosch from the other truck with about 30,000

Featured Replies

  • Staff

I get some pics up this weekend as I have a lot involved with other people and things happening now. I think the alternator shorted because there may be something wrong with the trucks wiring. That last alternator was almost new, an original Bosch with only 40,000 miles on it. Should have gone 240,000. The batteries are new last April.

 

I will also do the voltage drop test. That B+ cable was newly made only a couple years ago during W-T's educating all of us on reducing the amount of AC ripple throughout the system.

 

Thank you all for the great input....... is good reading. 

21 hours ago, Mopar1973Man said:

 

Your case the battery shorted out and overheated the alternator. Hence why the alternator was hot, and the fuse connection was hot. Still in all the alternator is only 136 Amps so it will never charge any more than that period even with a dead short. That fuse will never blow. 

 

Now if the diodes shorted to ground, like you mention in the PM with @W-T yes it does cover the shorted stator and shorted to ground diode. But it does not protect the armature which burns up the PCM voltage regulator circuit. 

That was the first time I shorted the Alternator,(last April) this time, 5 months later it shorted after using starter, gid heaters, and the seat heaters on high. I wait a few minutes to not use them all at once, giving the batteries a chance to regain some charge. That's when this second Alternator went.

  • 2 weeks later...
  • Author

Thanks again for all the input.  Turns out I needed to put the alternator on the back burner.  The Tuesday before turkey day my lift pump took a dump.  It was a FASS DDRP and the shaft seal went on it.  Got home form work and fuel was leaking pretty good out the weep hole.  Thank goodness for Amazon.  I ordered an Airdog DRP the day before turkey day and got it the day after.  I find the Airdog to be quieter than the FASS and I like the adjusability of it.  I'm glad I move it to in front of the tank.  Makes the change a lot easier.

 

I plan to get to the alternator this weekend.  Got to go to Texas for a funeral next week and need to to some routine work on the truck.

 

Thanks again

 

L8tr

d

Go to topic listing