Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors


B-110 starter/generator check?

Recommended Posts


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?


Share this post

Link to post
Share on other sites

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.


Share this post

Link to post
Share on other sites

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.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Who's Online (See full list)

    • CarlH
    • abu507
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • SonOfCreepfeed


      Thinkin' about this old girl.

      · 3 replies
    • Dean McFadden

      Dean McFadden

      Good morning peeps! I’m always searching for helpful information with my AC collection. Hope to find out new information and pass on my own experience in restoration. Here are some pics of my babies. I’m still looking for front rims for the 410 so yesterday I put the 310 wheels on took it for a drive. Working pretty good but still needs some carb work. Gotta get the 310 running next. Have a great day!😁

      · 1 reply
  • Adverts