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J D 455--engine & mower quit after short use time and battery low or dead

j d 455

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#1 stogey#1 OFFLINE  

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Posted June 18, 2015 - 11:28 AM

After mowing 3 hrs, my wife shut off our JD 455 then it would not start and battery was very low. boosted batt and got running agin.

 

checked alternator when running--output 12.99 volts. after about 15 minutes mowing---engine stops dead. try to start--no go. checked batt voltage 9.75 then rapidly increasing up to normal range.

 

boosted batt again to start---running and mowing then shut down again---same results.

 

Questions :  battery seems ok---alternator seems ok  possible bad cell in battery ???

 

any suggestions would be greatly appreciated. I would like to try and fix myself if possible.

 

Thank you, all for any input or suggestions. Take Care.

 

Larry


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#2 crittersf1 OFFLINE  

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Posted June 18, 2015 - 12:57 PM

:welcometogttalk: 12.99 is NOT charging. That's battery voltage.


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#3 Marty'70 ONLINE  

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Posted June 18, 2015 - 01:10 PM

:welcometogttalk: 12.99 is NOT charginzg. That's battery voltage.


Ditto. 12.99 is just above battery voltage. Check regulator or alternator.

#4 stogey#1 OFFLINE  

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Posted June 18, 2015 - 02:14 PM

Thank you Critters and Marty !!!! 

 

That's what I thought also but I did not know what the charging number should be-----few years back a repairman replaced the original JD alternator with a $ 115.00 Chinese model. Only lasted maybe 4 years at 8 hours per week cutting.

 

Guess I will pull the old J D one out of storage and see if I can get bearings for it and put it back in. Even though the original was rattling like a snake, it was still working. I'll have to look for a rebuild kit for it.  Tractor is a '96 model and only has 1460 hrs.

 

Thank you again gentlemen for your help and advice. Take Care

 

Stogey # 1



#5 Bill 76 OFFLINE  

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Posted June 18, 2015 - 03:30 PM

What marty and critters said 12.9 is just battery voltage---charging voltage is around 14.5 volts


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#6 DennyIN OFFLINE  

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Posted June 18, 2015 - 05:22 PM

Probably a dumb question, but the 455 is a diesel, I can understand why the mower would quit with low battery voltage, but why would the diesel engine quit?   


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#7 WHdbJD OFFLINE  

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Posted June 18, 2015 - 06:34 PM

Probably a dumb question, but the 455 is a diesel, I can understand why the mower would quit with low battery voltage, but why would the diesel engine quit?   

I'm not a diesel mechanic, but I'm going to guess that the voltage was not high enough to hold the fuel 

selonoid open?


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#8 olcowhand OFFLINE  

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Posted June 18, 2015 - 07:29 PM

I'm not a diesel mechanic, but I'm going to guess that the voltage was not high enough to hold the fuel 

selonoid open?

 

Yep, that's it.


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#9 WNYTractorTinkerer OFFLINE  

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Posted June 18, 2015 - 08:53 PM

It may also be causing the power module's relay to stop telling the fuel S/off to open.  Pull off the right side cover and look behind the radiator.  With the PTO switch off and the brake depressed a green LED is lit on the board that means it is OK to run.  The Fuel S/off solenoid is on the left side of the engine and when the green light is turned on you will hear a loud click and see the rod extend to open the fuel flow.  That's pretty much all there is to it..  


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