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Cub Cadet 782D Stopped Charging


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#1 bigspoon OFFLINE  

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Posted December 20, 2013 - 08:01 PM

Need to know, how to test an alternator on a Kubota d600. I checked the voltage from the two wires coming out of the Alt. I'm getting around 30vAC full throttle. Measured voltage coming out the rectifier/regulator get only 12.5 vDC. I should be getting around 14-16 VDC coming out reg. Got to battery @ full throttle

#2 JDBrian OFFLINE  

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Posted December 21, 2013 - 07:47 AM

Sounds like the rectifier/regulator may be faulty. However I would check for bad connections from the battery to the engine chassis and at any connectors. Check for a blown fuse. I'd also check the battery voltage when disconnected from the regulator and on a charger to make sure it doesn't have a shorted cell and won't come up past 12.5volts. A bad battery could be the issue. 



#3 bigspoon OFFLINE  

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Posted December 21, 2013 - 08:02 AM

I've put an extra ground wire from battery to engine and then cleaned all other connections Ive check the battery w/o engine running reads 12.5volts. I've also measured volts coming out the rectifier and only read 12.8 volts. I'm leaning toward bad rectifier

#4 olcowhand ONLINE  

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Posted December 21, 2013 - 09:29 AM

Voltage regulator/rectifier MUST have a good ground to work.  If that is good, then likely the regulator is shot.  One off a Kohler or Onan should work just fine, as they use the same AC voltage & 2 stator wires.


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#5 bigspoon OFFLINE  

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Posted December 28, 2013 - 01:10 PM

Finally got some time to T-shoot the non charging issue. Measured voltage A/C out alternator a its above specs @ 27vac checked wiring to reg/rectifier good. Ground good voltage to reg good. Voltage coming out reg bad reading only 12.7vdc. Looks like the reg is bad.

On a side note I did replace the glow plugs and put a 350cca battery in and it does start a whole lot easier, just need to replace the reg so I can charge that mighty little battery lol.




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