F2 Charging System ?
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=155687
Printed Date: 27 Apr 2024 at 5:31am
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Topic: F2 Charging System ?
Posted By: FREEDGUY
Subject: F2 Charging System ?
Date Posted: 17 Nov 2018 at 6:47pm
| We survived the corn harvest season with NO mechanical break downs, although there was an issue with human error(mine) resulting in the seperator clutch slipping to the point of plugging the feeder beater. After harvest, the Battery gauge now starts at the "normal" 14 'ish volts and after the engine is running, climbs to 16 volts somewhat quickly but not instantly/ I took the alternator in to our local/trusted shop and it checked out OK. The tech thought the "sensor" wire has a bad connection somewhere between the alt and gauge, which I have verified after re-installation and multi/meter testing. Is there any ONE place you guys have seen an issue pertaining to this circuit? Thanks |
Replies:
Posted By: DougS
Date Posted: 17 Nov 2018 at 7:46pm
| What does a real volt meter show at the battery? |
Posted By: MACK
Date Posted: 17 Nov 2018 at 9:54pm
| I would replace the V regulator in side the alternator for no more than one cost. MACk |
Posted By: SteveM C/IL
Date Posted: 18 Nov 2018 at 9:24am
| Mine did that when the battery was getting bad. New battery fixed it. |
Posted By: FREEDGUY
Date Posted: 18 Nov 2018 at 5:12pm
When the engine is running and the 2 pole connector hooked up to the alternator, 15.8 volts,when I disconnect the "plug", the volts come down to 13.3?
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DougS wrote:Posted By: Mikez
Date Posted: 19 Nov 2018 at 8:45am
| What engine does the F2 have in it |
Posted By: DougS
Date Posted: 19 Nov 2018 at 1:25pm
13.3 would be about right if measured just after removing the charge source. What is the voltage at the sense input to the alternator or regulator? If this is 15.8 volts, you have a bad regulator. If the is zero or anything much below 15.8, you probably have an open wire or bad connector in the sense circuit. |
Posted By: FREEDGUY
Date Posted: 19 Nov 2018 at 5:30pm
|
Mikez, 433T with 2 batteries hooked in series?? To Doug, I am unsure how to test what you are asking, LOL!! I am by no means a "tech" and am really proud of myself for not getting sparks flying doing testing on a running alternator LOL!! When I took the alt in to be checked out, they did put a " jumper" wire in the 2 pronged terminal ??
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Posted By: DougS
Date Posted: 19 Nov 2018 at 7:29pm
| Someone tell me: Does the F2 alternator use an internal or an external regulator? FREED: Who tested the alternator? I’m on my cell phone right now and I can’t easily go back and read your original post. If you didn’t take the alternator (and regular, if it has an external regular) to an automotive electrical shop, do so. Don’t take it to an automotive parts store for testing. |
Posted By: AC7060IL
Date Posted: 19 Nov 2018 at 8:05pm
If your batteries are hooked in SERIES (ground hooks to negative terminal of 1st battery then positive terminal of 1st battery is hooked to negative of 2nd battery & positive of 2nd battery hooked to starter), then they'd be two 6 volt (3 cell caps on each battery) to equal 12 volt that's required. Or... In most cases two 12 volts are hooked in PARALLEL (negative ground is hooked to both battery's negative terminals & starter's positive is hooked to positives of both batteries. This setup gives a strong 12 volt total. |
Posted By: FREEDGUY
Date Posted: 19 Nov 2018 at 9:29pm
|
7060,they are 12 volt batteries hooked +to+ and -to- so parrallel,my mistake. Doug,it was bench tested at a local independent repair shop that specialize in electrical components, thanks. Btw,it was mentioned about battery issue,can a battery be tested? If so,I am very certain we don't have that equipment on hand,LOL!! We've owned the machine for 11 years and I don't recall changing them.
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Posted By: farmboy520
Date Posted: 20 Nov 2018 at 6:34am
| Unhook the batteries and check the voltage of each battery independently. A good battery can read from 12.7 to 11.5. If you have a battery tester, test each battery with the load switch and see where your voltage is at after that. A weak battery would show up after the load test. |