@@wtbm123 Did that. But when checking the stator while running, it only has about 32V (AC). My tractor is an 87 JD, Kohler 14 HP. You and others are over 40V. Not sure if that's bad enuff to kill a $150 Napa battery, only 1 yr old
Went through the same thing with my 316. Voltage regulator rectifier was OK. The melted A/C connector like you had was the problem. Cleaned up the connector everything was OK. So maybe your old voltage regulator rectifier is still OK.
Nice diagnostic Terry. Before I put my kubota tractor away for the season I noticed in testing my battery voltage was 16 volts . I've never seen a voltage that high . It does have a simular system that produces ac voltage then rectified to dc . Have you seen these fail producing too much voltage ? I just replaced the battery two months ago . I'm figuring reading 16 volts with the engine just turned off at the battery is too high , any thoughts.
It does sound like a poor regulator, i would expect about 14 volts charging and the battery should slowly drop down to 12.7 to 13 volts after sitting off for 10 mins. Dam im in waffling mode lol.
@@zx8401ztv That's what I thought as well. 16v I've never seen testing any machine running or a battery . I'm boiling my new battery it seems over the last two months 😅 Next spring I will have to investigate or fly Terry up to my place.
Great video Terry, very informative and easy to follow. I pretty much have the same situation as you did, with one exception. When I test for AC voltage across the w stator wires(at full throttle) im only seeing about 25 V. Wondering if I should go ahead and replace the Voltage Regulator before digging further into the stator. Thanks
@@wtbm123 iam not sure I got it with the motor already taken out of the mower and and apart for a oil leak and was just wondering if I should try and find a replacement stator while I have it apart
@@wtbm123 it's looks good to me I no it should put out around 40 AC volts when running but like I said motor is out of the mower I did put power to the motor and just turning it over iam putting out 7 ac volts iam half tempted to try and bolt it to the bench and try to start it and see how many ac volts it's putting out before putting the motor back in the mower
On my JD 318, does the battery wire that goes to the center terminal on the voltage regulator stay hot all the time or only when key is on. My is hot all the time. Any thoughts.
I am thinking with key on . Some tractors have power there all the time , but thinking just when key is on . I will test soon and if wrong i will let you know
I was just stopped in where the tractor in video is and i checked for power on center wire . It does have power with key in OFF position . I was wrong when i said only with key on . Sorry
You can put both leads on battery terminals , or neg on neg battery terminal and pos of meter on center wire of regulator . At half throttle or above should be 14 - 15 volts , But that also depends on the health and state of charge in battery . If battery is fully charged , you may just read in the mid to high 13`s . And when you shut off the engine it should drop back into the 12 v range . 12.6 being a good battery but may say 12.7 or something just after it was shut off. . Sorry about not showing it better .
The unloaded generator did produce a high voltage, i thought that the regulator died because of that, and an imperfect battery conection while it was running. Maybe the generator produces much more voltage than needed, the regulator will have to dissipate that unwanted energy in heat (The regulator case). I suspect the regulator case does not have enough mass to absorb the heat. Imagine how cool it could be if a thick aluminium plate with the regulator hole shape in the middle. Mount the regulator in the plate hole and it would last 400 years.. ok longer lol :-D Sometimes i suspect things are rigged to fail hmm lol. Hell dont i waffle on a lot lol.
Those regulators have a high failure rate. Most are cooled by the cooling fan , but i see people mount them to frames and stuff . I always wondered if they over heat easy that way .
These are the only videos I will ever comment on because somehow, someway, your diagnostics always help me solve my problem with my 318. Thank you
Thank you , Glad it helped , Just showing what i have done to diagnose and fix the JD . Glad others are also keeping the old tractors going.
Great diagnostics Terry. 👍👍
Thanks 👍
Thanks for your help with this video! I was able to diagnose my tractor which, as it turns out, only had a switched wire😅
Glad it helped
Needed this for my 214. Well done. Thanks for posting.
Hope you get it all sorted out and thanks for stopping by.
@@wtbm123 Waiting for mail delivery, to find out. I'll let you know, when it happens. Thanks.
Wasn't the regulator. I put on a new one, just because it was the original. Now I have a new JD replacement. Next, to do your other checks.
@@joequillun7790 Make sure 12 v gets to the center terminal , and that the regulator is grounded .
@@wtbm123 Did that. But when checking the stator while running, it only has about 32V (AC). My tractor is an 87 JD, Kohler 14 HP. You and others are over 40V. Not sure if that's bad enuff to kill a $150 Napa battery, only 1 yr old
Thanks for this helpful instruction. This info will be very helpful
Hoping it helps at least one person someday . Thanks for stopping by
Went through the same thing with my 316. Voltage regulator rectifier was OK. The melted A/C connector like you had was the problem. Cleaned up the connector everything was OK. So maybe your old voltage regulator rectifier is still OK.
Thank you for stopping in and commenting
Nice diagnostic Terry. Before I put my kubota tractor away for the season I noticed in testing my battery voltage was 16 volts . I've never seen a voltage that high . It does have a simular system that produces ac voltage then rectified to dc . Have you seen these fail producing too much voltage ? I just replaced the battery two months ago . I'm figuring reading 16 volts with the engine just turned off at the battery is too high , any thoughts.
It does sound like a poor regulator, i would expect about 14 volts charging and the battery should slowly drop down to 12.7 to 13 volts after sitting off for 10 mins.
Dam im in waffling mode lol.
@@zx8401ztv That's what I thought as well. 16v I've never seen testing any machine running or a battery . I'm boiling my new battery it seems over the last two months 😅 Next spring I will have to investigate or fly Terry up to my place.
Yea 16 after shut off seems high . 14.6 - 14.9 is usually what i see running .
Myself i would probably change the regulator , if nothing else just to know. Most are cheap , not sure how much they would be for a kubota
I agree
Great video Terry, very informative and easy to follow. I pretty much have the same situation as you did, with one exception. When I test for AC voltage across the w stator wires(at full throttle) im only seeing about 25 V. Wondering if I should go ahead and replace the Voltage Regulator before digging further into the stator. Thanks
When testing stator you are not going through the regulator , Also make sure the regulator is grounded . The regulators do go bad .
I have .03 on AC wires and no short to ground on either AC wire is .03 acceptable?
Is it charging ok . I have seen some still charge , When running at higher rpm do you get AC voltage on the stator wires.
@@wtbm123 iam not sure I got it with the motor already taken out of the mower and and apart for a oil leak and was just wondering if I should try and find a replacement stator while I have it apart
@@mikesautomaintenance5780 Is it stil copper color or are there dark places forming on it.
@@wtbm123 it's looks good to me I no it should put out around 40 AC volts when running but like I said motor is out of the mower I did put power to the motor and just turning it over iam putting out 7 ac volts iam half tempted to try and bolt it to the bench and try to start it and see how many ac volts it's putting out before putting the motor back in the mower
On my JD 318, does the battery wire that goes to the center terminal on the voltage regulator stay hot all the time or only when key is on. My is hot all the time. Any thoughts.
I am thinking with key on . Some tractors have power there all the time , but thinking just when key is on . I will test soon and if wrong i will let you know
I was just stopped in where the tractor in video is and i checked for power on center wire . It does have power with key in OFF position . I was wrong when i said only with key on . Sorry
It was good until the end. Couldn't read the meter to show how much it was charging or where you connected your leads to check the regulator output.
You can put both leads on battery terminals , or neg on neg battery terminal and pos of meter on center wire of regulator . At half throttle or above should be 14 - 15 volts , But that also depends on the health and state of charge in battery . If battery is fully charged , you may just read in the mid to high 13`s . And when you shut off the engine it should drop back into the 12 v range . 12.6 being a good battery but may say 12.7 or something just after it was shut off. . Sorry about not showing it better .
On my 2305 it blew a diode, and took the alternater with it.
Thank you for sharing , it may help someone out there with the same issue.
The unloaded generator did produce a high voltage, i thought that the regulator died because of that, and an imperfect battery conection while it was running.
Maybe the generator produces much more voltage than needed, the regulator will have to dissipate that unwanted energy in heat (The regulator case).
I suspect the regulator case does not have enough mass to absorb the heat.
Imagine how cool it could be if a thick aluminium plate with the regulator hole shape in the middle.
Mount the regulator in the plate hole and it would last 400 years.. ok longer lol :-D
Sometimes i suspect things are rigged to fail hmm lol.
Hell dont i waffle on a lot lol.
Those regulators have a high failure rate. Most are cooled by the cooling fan , but i see people mount them to frames and stuff . I always wondered if they over heat easy that way .
Not charging oh no that's not a great thing
Just glad it was only the regulator
@@wtbm123 that is the truth for that matter because of the price of part's plus the shortage 😧😳