What size Alternator do I have? - Ford Truck Enthusiasts Forums



1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

What size Alternator do I have?

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-23-2011, 11:16 AM
freef2504x4 freef2504x4 is offline
New User
Thread Starter
 
Join Date: Jan 2011
Posts: 14
freef2504x4 is starting off with a positive reputation.
What size Alternator do I have?

I got my new truck home yesterday and it needs a belt to the alternator. I looked it up on line and it asks what size the alternator is. Where do I look for this information on the truck?
Its a 86 f250 4x4 ext cab with 460 and no A/C, auto trans.
I would use the old belt, but it is missing.
Is there a tag or sticker somewhere?
Reply With Quote
  #2  
Old 01-23-2011, 11:25 AM
LARIAT 85's Avatar
LARIAT 85 LARIAT 85 is online now
Postmaster
 
Join Date: Dec 2004
Location: Florence, SC
Posts: 2,795
LARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to behold
It should be a 60 amp alternator, but a 70 amp was also optional, probably if the truck had A/C.

Just take your old alternator off, and go to CarQuest and ask for a replacement 60 amp alternator. If the replacement is too small, your truck has the bigger 70 amp alternator.
Reply With Quote
  #3  
Old 01-23-2011, 12:01 PM
human_fly_ human_fly_ is offline
Junior User
 
Join Date: Oct 2003
Location: Canada
Posts: 63
human_fly_ is starting off with a positive reputation.
Quote:
Originally Posted by freef2504x4 View Post
I got my new truck home yesterday and it needs a belt to the alternator. I looked it up on line and it asks what size the alternator is. Where do I look for this information on the truck?
Its a 86 f250 4x4 ext cab with 460 and no A/C, auto trans.
I would use the old belt, but it is missing.
Is there a tag or sticker somewhere?
There is a production stamp on the top or the back of the alternator indicating the amperage your alt. will handle.

Lariat is right about 60 vs. 70, but find the stamp on your specific component and it show the number followed by the capital letter A:
for example: 60A - for 60 Amps; or 70A - for 70 Amps.

Hope this helps.
Reply With Quote
  #4  
Old 01-23-2011, 12:01 PM
cadunkle's Avatar
cadunkle cadunkle is offline
Posting Guru
 
Join Date: Oct 2005
Location: NJ
Posts: 1,043
cadunkle is gaining momentum as a positive member of FTE.
The guy just needs a belt, not an alternator.

To the OP, it should be stamped on the case of the alternator. Worst case just tie a string so it fits around the pulleys and measure that. Belts are normally sold and marked by width and length, so it should be easy to see which is correct. Odds are you have a normal small case alternator (65 amps or less).
Reply With Quote
  #5  
Old 01-23-2011, 12:12 PM
bashby's Avatar
bashby bashby is offline
Post Fiend
 
Join Date: Nov 2005
Location: Charles Town, W bygod Va
Posts: 7,357
bashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to all
I imagine the 2 belts it calls for are real close to the same size, good chance either one would work. I'd probably just buy both and return the one that doesnt fit as well.
Reply With Quote
  #6  
Old 01-23-2011, 12:58 PM
LARIAT 85's Avatar
LARIAT 85 LARIAT 85 is online now
Postmaster
 
Join Date: Dec 2004
Location: Florence, SC
Posts: 2,795
LARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to beholdLARIAT 85 is a splendid one to behold
I realize he doesn't need an alternator, cadunkle. He needs an alternator belt, and depending on the alternator size, his application uses one of two different belts: one fits a 60 amp alternator, the other fits a 70 amp alternator. I couldn't find any stamp on the case of my alternator when I replaced mine a year ago, so I just took the alternator with me and the 60 amp version is what mine turned out to be.

Since you don't know what size your alternator is, you will still have to look at both available alternator belts to see which one fits. I don't think the belts have a measurement size on the packaging. Sometimes the belt sizes can be pretty close, and it is hard to tell what size is actually needed just by looking at them. That is why I suggested taking the alternator with you so that you may first find out what size alternator you have, then you will know for sure what the correct belt is.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Belts for 300 I-6? What year do I have? 86stepsideF150 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 10 08-27-2016 11:39 PM
Leece-Neville alternator, belt too short? hydrolocked 6.0L Power Stroke Diesel 15 10-21-2015 02:00 PM
2 Belt Alternator Pulley on 71 F250 with 360 Big Skier 1967 - 1972 F-100 & Larger F-Series Trucks 18 06-18-2008 12:39 PM
powermaster alternator? (uh-oh) monkei 1978 - 1996 Big Bronco 13 02-26-2004 04:40 PM
powermaster alternator? (ummm) monkei Electrical Systems/Wiring 1 02-19-2004 07:58 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
2003, 2010, 2011, 99, alternator, altonator, amperage, diesel, f150, f250, ford, size, sizes, sizing, truck, xlt

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 07:19 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.