IH PARTS AMERICA
Click Here!

Go Back   IH PARTS AMERICA > Tech Forums > Electrical Tech
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read Photo Gallery IH Store Home

Reply
 
Thread Tools Display Modes
Old 12-08-2017, 12:12 PM   #1
Mark Pietz
Senior Member
 
Join Date: Aug 2010
Member Number: 2143
Age: 66
Posts: 600
Default Delco 10si Alternator question

I put a rebuilt alternator in my Scout about six months ago, and it has very few miles on it. It developed a problem where the battery would go flat overnight, and I traced the drain to the alternator. Took it apart - the diode trio was crispy powder, and the rectifier bridge damaged. Rather than take this thing back under warranty, I decided to just buy the internal components figuring I can't do any worse by it. Question is this: In this picture (not my unit but demonstrates the question), looking at the regulator assembly, there is a thin, white tubular resistor-like thing bridging the upper insulated screw to the grounded screw next to the stator at the 7 o'clock position. I don't see this component in the FSM wiring diagram or pics. I'm sure it's just one of those normal variants that doesn't affect our application but curious if someone can tell me what it is for, or maybe even its electrical value to test it.
Attached Images
 
Mark Pietz is offline   Reply With Quote
Old 12-08-2017, 01:23 PM   #2
FDChappie
Senior Member
 
FDChappie's Avatar
 
Join Date: Aug 2011
Member Number: 3742
Location: Northern New California
Posts: 1,576
Default Re: Delco 10si Alternator question

I think that is a resistor for cutting the field current for low rates of charging. I've rebuilt a bunch of these alternators easy peasy. O'Riley auto parts used to stock a kit with all the necessary parts for $20. All kinds of high quality parts available on the internet too.
__________________
1974 Scout II 345 T-19
1971 Travelette 392 T-36
1972 Loadstar 1700 dump truck 345 T-35
FDChappie is online now   Reply With Quote
Old 12-08-2017, 01:59 PM   #3
Mark Pietz
Senior Member
 
Join Date: Aug 2010
Member Number: 2143
Age: 66
Posts: 600
Default Re: Delco 10si Alternator question

I figured it was a resistor but not why it was there. I'll leave it in place when I reassemble this thing this weekend. Yes, gazillion kits out there for around $20. The diode trio was literally powder and that is a $3 item, but the rectifier showed a bad diode as well. Not sure which caused which to fail, but for $20 no reason to puzzle it out.
Mark Pietz is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 06:00 PM.