460 Generator Voltage Output

[mdemeyer]

Hello.

Does anyone happen to know the voltage output for a 460 generator?

I had mne rebuilt and it only is putting out 12.4, so I bought one, rebuilt, and it's putting out even less. My mechanic says it should be at leats at 13.5.

It's a 12 volt system.

Thanks!

 

[Powerpack50]

Not wanting to upset anyone but for what it is worth the last time I was asked to look at a charging problem turned out to be the multi meter that was being used was reading way to low. Using my works meter thats calibrated regularly showed the system was charging fine. The starting problem turned out to be a high resistance earth lead connection. If its a dynamo as opposed to a alternator could be the regulator is off. Its the regulator that sets the output voltage. Your mechanic is right 13.5v is a minimum 13.8v would be better.

 

[El Toro]

Should be around 14.0 volts. Check the charging voltage at the battery with a volt meter and the engine at 1/2 throttle or better. Hal

 

[Allan in NE]

Full bore, they will put out about 18.5 volts.

Regulator ought to hold 'er down at around 14 "ish".

Allan

 

[John T]

The open unloaded output of a genny dont really tell ya all that much, its the voltage to which it can raise a good battery battery when coupled up to it via the Voltage Regulators Cutout Relay and the ammeter etc. If the genny n VR and wiring is alllllll good a battery voltage should rise to at least 13 and up to the 14 n a lil over range.

Check for a good tight belt and good grounds on the Genny and VR and see what a voltmeter does attached to the battery with tractor setting (ought to be around 12.6 volts) and then running at RPM it should rise over 13 at least, depends on battery condition

If all else fails run through my Troubleshooting Procedure

John T
John Ts Troubleshooting Procedure

 

[mdemeyer]

Well, it looks like my problem is definitely related to the generator. Everything else has been checked according to my mechanic. After running the tractor all day, it just died, no battery power. Battery charging now.

when I had the generator rebuilt, they did not replace the armature but re-wroed it. Output was at 12.4. So, I order a new-rebuilt one ($300+) which as I mentioned is even putting out less volts. My mechanic says it the armature, so I need to find a new one.

Does anyone know of a place that has armatures, not rewired but new? My tractor parts place had a real hard time locating one for the 460.

Much appreciated!!!

 

[Janicholson]

Use a jumper wire with allegators on both ends.
Connect one end to the engine on clean metal (ground it).
Start the tractor and run it at 1/2 throttle.
Attach the other end of the jumper to the F terminal on the generator. This makes it charge full voltage. (you can leave it on that way for a half hour or more, so do not worry)
Now look at the amp gauge, it should read a goodly charge rate (about 12 amps or so).
If it does, the gen is good, and the regulator, or regulator ground is bad.
(this assumes all connections are correct, and good/shiny bright)
Armatures are at times faulty, but not often, and not two of them. I would ask that you start a new topic when this is checked. Generators are not common knowledge repair any more. JimN

 

[mdemeyer]

Jim:

Thanks very much. We will give this a try tonight and I will post back tonight with the outcome.

Much appreciated!
Michelle.