The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-31-2011, 08:55 PM   #1
tomfg
Registered User
 
Join Date: Dec 2003
Location: Land Of 10,000 Misquitos
Posts: 134
Delco 10SI Alternator

My truck came with a Delco 10-SI Alternator

I installed a rebuild kit in the Delco 10si today, as it was charging a steady
15+ volts.
New bearings, brush holder, regulator, screws, diode tree, etc.

Glad I tore it down. Front bearing was dry, and the brushes had about done wore out.

There's a resistor on my old parts, that's not included in the new parts. Am I suppose to re-use this resistor? It's the one in the photo below.
If I remember correctly, it test out at about 46 ohms.

It's set up as a "3-wire" unit.

Thanks.
Attached Images
 
tomfg is offline   Reply With Quote
Old 12-31-2011, 11:37 PM   #2
neto
Registered User
 
neto's Avatar
 
Join Date: Jan 2007
Location: Madera, California
Posts: 291
Re: Delco 10SI Alternator

Sorry I have no clue. I wonder if they might know in the electrical forum? Is the rebuild a staight parts replacement deal?
neto is offline   Reply With Quote
Old 01-01-2012, 02:50 AM   #3
Ledslinger
Registered User
 
Join Date: Dec 2011
Location: Lee's Summit, MO
Posts: 102
Re: Delco 10SI Alternator

I've rebuilt hundreds of those, always reusing the resistor. I think it suppresses radio noise, or the condenser may be for that. Be sure you put the ground (non-insulated) screw in the right hole. I can remember rebuilding these when they first came out in about 1972 and were cutting edge technology.
Ledslinger is offline   Reply With Quote
Old 01-01-2012, 10:20 AM   #4
tomfg
Registered User
 
Join Date: Dec 2003
Location: Land Of 10,000 Misquitos
Posts: 134
Re: Delco 10SI Alternator

Happy New Year

Thanks for the replies. Glad to hear that you re-used them,
as I already have the unit buttoned up.
Hints of information I found on the Net suggest that those
resistors help the 3 wire units "excite" faster, and
they are not needed for the "one wire" setups.
tomfg is offline   Reply With Quote
Old 01-01-2012, 10:42 AM   #5
sigshooter
Registered User
 
sigshooter's Avatar
 
Join Date: Aug 2011
Location: Tahlequah, Ok
Posts: 1,235
Re: Delco 10SI Alternator

Quote:
Originally Posted by tomfg View Post
Happy New Year

Thanks for the replies. Glad to hear that you re-used them,
as I already have the unit buttoned up.
Hints of information I found on the Net suggest that those
resistors help the 3 wire units "excite" faster, and
they are not needed for the "one wire" setups.
Maybe I can wire up one of those resistors to my wife........ to help excite her faster
__________________
1965 long bed ( grandpas old truck )
1964 long bed BBW Custom Cab
1966 Short stepside
1964 long bed
1965 long bed Custom Cab, factory air, V-8, powerglide
sigshooter is offline   Reply With Quote
Old 01-01-2012, 01:26 PM   #6
tomfg
Registered User
 
Join Date: Dec 2003
Location: Land Of 10,000 Misquitos
Posts: 134
Re: Delco 10SI Alternator

The alternator rebuild seems to be a sucess, and is regulating now.
Started it up, and on fast idle it was reading 14.94, and came
down slowly to about 14.8 something. Ran it thru the paces
with the high beams, and heater blower on high.
Still want to take it out on the road and see what happens
at cruising speed, but it's snowing and blowing......
maybe tomorrow.

Let me know if the "excitation" thing works....... believe
I have some parts in the garage to rig up something.
tomfg is offline   Reply With Quote
Old 01-01-2012, 01:45 PM   #7
Wrenchbender Ret
Registered User
 
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
Re: Delco 10SI Alternator

Your gage must be reading high. It should not charge much if any over 14 volts.
Wrenchbender Ret is offline   Reply With Quote
Old 01-01-2012, 04:53 PM   #8
tomfg
Registered User
 
Join Date: Dec 2003
Location: Land Of 10,000 Misquitos
Posts: 134
Re: Delco 10SI Alternator

On the kit I purchased, it states that the
"regulator set point: 14.7 volts"

I believe my VOM meter is close, as it
was reading 12.56 volts at the battery
before I started the engine.

After I ran the the truck awhile, and the
heater, lights, etc., the voltage settled
in at 14.74 according to what I wrote
down. I'm anxious to see if it regulates
below 15 volts when I'm doing 55.
tomfg is offline   Reply With Quote
Old 01-02-2012, 01:22 AM   #9
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
Re: Delco 10SI Alternator

May I ask where you bought your rebuild kit for your alternator?
__________________
Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
Captainfab is offline   Reply With Quote
Old 01-02-2012, 08:53 AM   #10
tomfg
Registered User
 
Join Date: Dec 2003
Location: Land Of 10,000 Misquitos
Posts: 134
Re: Delco 10SI Alternator

Purchased it off of EBay..... Chinese parts. Hope it
last a few days. Wonder if US parts are still available
for these units. May get a spare alternator to
rebuild and have on hand....... fun project anyway.
tomfg is offline   Reply With Quote
Reply

Bookmarks

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

Forum Jump


All times are GMT -4. The time now is 11:35 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com