Cub Cadet LTX1050VT not charging

[mjw357]

Wife went to start tractor this afternoon, no go. Checked battery, 11.8v or something. Jumped it to start, 10.something across terminals. So the ignition/headlights are pulling it even lower while running, obviously not getting anything from the charging circuit. New battery as of last September.

Have battery on charger as I type this. Engine is B&S 24HP twin. Single black wire running up under flywheel area. Green connector to yellow wire to regulator/diode. Red wire running from regulator/diode out to tractor. Reg/diode is about 2" square by 1", bolts to engine shroud.

What voltages am I looking for? Easy way to test alternator/stator?

 

[mechanic mark]

http://service.mtdproducts.com/Training_Education/769_04590b_LTX/769_04590b_LTX.pdf see electrical troubleshooting page 187, also make sure all connections are clean & tight including ground straps & cables, try moving them by hand. Let us know what you find, thanks.

Post all numbers from engine data plate, model xxxxxx, type xxxx, trim xx, code xxxxxxx.

 

[mjw357]

Thanks for the reply.

This manual references two white wires coming from stator, and shows a 3-wire type regulator.

I will try starting the engine and testing for AC voltage from the stator, then checking the output of the regulator. From What I have read and tested so far, I am leaning towards a bad regulator.

EDIT: Started mower, black wire just above idle about 30vac, at full throttle 42vac. Connected regulator, at full throttle, only getting about half a volt DC.

So, bad regulator I suppose?

 

[ILENGINE]

Make sure you are getting 12 v from the battery at the wire that connects to the voltage regulator.

 

[mjw357]

Post all numbers from engine data plate, model xxxxxx, type xxxx, trim xx, code xxxxxxx.

B&S model 44M777
type 0720 B1
code 081219YG

There is 12.8v at red wire.

Ordered replacement for part # 491546.