B-110 starter/generator check?

[macallis180 296]

My "new to me" B110.

Put a new ammeter on as old one had broken needle. Does not show charge or discharge when running.

Which terminals should I check with a voltmeter to see if generator is working? Or if the regulator is working or not working?

Thanks.

[Chris727 2,021]

Check for voltage at the "A" terminal on the starter-generator. It should be something like 15-16 volts.

[macallis180 296]

Chris: When I check, should I have one probe on the A terminal, and the other on the wire that feeds to the regulator?

THanks.

[macallis180 296]

Should I check this with one probe on the A terminal and the other on the terminal on the voltage regulator?

Thanks.

[PhanDad 3,617]

No, the other probe to ground. The voltage regulator should hold the produced voltage to that level to avoid frying the battery.After checking for 15-16v at the "A" terminal, check the "+" terminal of the battery. It should read the same as you measured at the "A" terminal. If not, then there's an issue in the wiring back to the battery. Could be a blown fuse as shown in one of these wiring diagrams (push button start vs solenoid start):

Also, the battery will only show charge just after starting the tractor when the S/G "replaces" the amps used in starting (assuming a fully charged battery). The S/G will provide current to any accessories directly without the current passing through the ammeter.

[macallis180 296]

Will have to check, hopefully Monday, as weekend is busy with things other than tractors!

Thanks, Bill for all the info.

Will get it figured out - step by step.