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Tractor Talk Discussion Forum

farmall cub charging system

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minifarmer

11-06-2005 20:47:50




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can any one tell me what outputs to test &where to determine if it is charging correctly?




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Keith-OR

11-07-2005 19:49:47




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 Re: farmall cub charging system in reply to minifarmer, 11-06-2005 20:47:50  
third party image

Here is a flow chart that might help you..hth
Keith



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John T

11-07-2005 06:22:21




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 Re: farmall cub charging system in reply to minifarmer, 11-06-2005 20:47:50  
Mini, does it have a working ammeter??? If so what does it show?? If not running and you turn on lights or ignition (if a distributor instead of a mag) if the ammetrs wired correct n working, it should swing over to the - discharge and then if shes working when shes running if shes charging, it ought to swing over to the + charge direction.

Or else if it has no ammeter or its stuck, if its charging the lights should glow noticeably brighter form idle to wide open. Thats about the same test Old referred to as placing a voltmeter on the battery. It should read near 6.3 volts setting but rise to 7 or more at wide open if shes charging.

Is it a 2 wire cutout relay system or a full fledged 3 wire Voltage Regulator??? Regardless, make sure the belt is good n tight and that the gennys has a good ground and when running dead ground the gennys Field post to case/frame n see if she charges then??? If so but not otherwise, the light switch is bad or not well grounded or the wire from the gennys Field to the switch is bad/open if its a 2 wire cutout relay system, or if its a VR, the Field Control relay is bad or the wires missing from the genny to the VR's FLD post or the VR's not well grounded.

This is a start so see what you find n post back n we can go from there. I will then give you more troubleshooting methods as needed. Are you sure the battery is good and capable of taking a charge??? maybe its the problem???

If its charging, the battery voltage will rise at RPM and/or the lights glow brighter and/or the ammeter will indicate charge..... ..... Does the battery always start the tractor or does it run down n need charged now n then?? (must have a genny or battery problem) If it stays up n always starts she must be charging !!!

Lemme know

Good Luck n God Bless

John T

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old

11-07-2005 07:03:23




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 Re: farmall cub charging system in reply to John T, 11-07-2005 06:22:21  
Somethings wrong John we agree again, you just explain it better then I can. I never have been very good at explaining thing in type/words in this type of place. If I'm talking to a person face to face I do a lot better. So did you ever figure out about how old, old is?? LOL



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John T

11-07-2005 08:36:47




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 Re: farmall cub charging system in reply to old, 11-07-2005 07:03:23  
Old, I kinda figure were near the same vintage from what you said before. Im a 1947 model myslef, you older then me ?????

Actually, I explain stuff better in writing then face to face cuz it gives me time to think it through. Being wordy is somethign I cant help though, after I retired from engineering I went back to Law School and now have a small semi retired country law practice and after all WORDS are the only thing a lawyer has to sell.

Take care my "old" friend

John T

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old

11-07-2005 09:07:23




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 Re: farmall cub charging system in reply to John T, 11-07-2005 08:36:47  
Well your not quite 10 years older then I am but close. LOL



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old

11-06-2005 21:22:45




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 Re: farmall cub charging system in reply to minifarmer, 11-06-2005 20:47:50  
Can't help you much but maybe a little. First check battery voltage with the engine not running, should be around 6 volts give or take a little. Then start the engine and check battery voltage again. If the chargeing system is working right you should get around 7 to 8 volts but the 8 is on the high side.



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Britton Floyd

11-07-2005 12:40:14




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 Re: farmall cub charging system in reply to old, 11-06-2005 21:22:45  
That would be correct if the battery is fully charged. If the battery is low or has a bad cell it will never get up that high even if the system is working fine. Most of the problems I've had with 6 volt systems ahve been a bad ground. Good start would be to clean all the grounding points then reconnect cables. If it grinds slow it can be a dirty starter flange. I discovered this by accedent on time, took off a new starter for the tenth or so time but this time I cleaned both the starter mounting flange and the engine mounting flange before bolting it back up. That cured a ten year old slow turn over problem.

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minifarmer

11-09-2005 07:19:49




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 Re: farmall cub charging system in reply to Britton Floyd, 11-07-2005 12:40:14  
thanks to all who replied this should help



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