Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Sears SS16 Onan will not charge battery

sears ss16

  • Please log in to reply
7 replies to this topic

#1 Gary from Muleshoe ONLINE  

Gary from Muleshoe

    Member

  • Member
  • Member No: 6921
  • 34 Thanks
  • 89 posts
  • Location: Muleshoe, TX

Posted September 16, 2016 - 03:36 PM

I have checked all output from the stater, it is 33 vac, full throttle, put new regulator on, grounded it well with a ground wire, still will not charge. Where do I need to go next? Chieffan has been a big help for me on this already. I am wondering if the stater is putting out to much voltage?



#2 Titus OFFLINE  

Titus

    Bush Hog Hoarder

  • Senior Member
  • Member No: 4216
  • 1,735 Thanks
  • 2,250 posts
  • Location: Coventry RI

Posted September 16, 2016 - 03:44 PM

How old is the battery?



#3 GWest OFFLINE  

GWest

    Tractorholic

  • Senior Member
  • Contributor
  • Member No: 130
  • 450 Thanks
  • 408 posts

Posted September 16, 2016 - 04:07 PM

If this is a 3-terminal regulator turn the ignition key to the RUN position with the engine not running.

Measure the voltage across the battery posts.

Now move the red test lead to the DC terminal on the regulator. You should have the same voltage reading. If you don't the path the charge current takes to get to the battery is compromised. 

This type of regulator must see battery voltage before it can regulate current. The battery voltage turns them on so to speak.

 

Garry


Edited by GWest, September 16, 2016 - 04:13 PM.

  • MH81 said thank you

#4 jms180 OFFLINE  

jms180

    Tractorholic

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 1266
  • 921 Thanks
  • 1,213 posts
  • Location: Harvest Alabama

Posted September 16, 2016 - 06:35 PM

I agree with Garry could be open circuit before current gets to battery maybe bad switch



#5 olcowhand ONLINE  

olcowhand

    Red Tractor Nut & Diesel Addict

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Sponsor
  • Contributor
  • Member No: 20
  • 35,637 Thanks
  • 29,838 posts
  • Location: South Central Kentucky

Posted September 16, 2016 - 07:02 PM

When you turn the key on, the wire from the key switch going to the regulator should read battery voltage.  If it isn't, then somewhere between there & battery is a broken circuit.  Your AC voltage from the stator is fine.



#6 Gary from Muleshoe ONLINE  

Gary from Muleshoe

    Member

  • Member
  • Member No: 6921
  • 34 Thanks
  • 89 posts
  • Location: Muleshoe, TX

Posted September 16, 2016 - 09:16 PM

Thanks guys, I will check that out in tomorrow.

Sent from my SM-G900P using Tapatalk
  • olcowhand said thank you

#7 GWest OFFLINE  

GWest

    Tractorholic

  • Senior Member
  • Contributor
  • Member No: 130
  • 450 Thanks
  • 408 posts

Posted September 17, 2016 - 06:57 AM

I should have included that not all models use the ignition switch for the charging circuit in case you go there looking for it and it is not there. If it is there the key must be in the RUN position to connect it to the battery.

 

Some models have the +DC wire going directly to the battery through a fuse and possibly tapped in at the starter solenoid battery cable.

The Onan's on the Wheel Horse tractors have a 20 amp stator and use a 30 amp fuse. Don't know if they ever used any other stator size in other applications.

 

Garry


Edited by GWest, September 17, 2016 - 07:01 AM.


#8 Gary from Muleshoe ONLINE  

Gary from Muleshoe

    Member

  • Member
  • Member No: 6921
  • 34 Thanks
  • 89 posts
  • Location: Muleshoe, TX

Posted September 19, 2016 - 09:02 PM

I did some more checking tonight and there is no voltage between battery and regulator. Also with engine running full throttle regulator is on putting out 10 vdc with wire to switch disconnected and connected.

Sent from my SM-G900P using Tapatalk





Also tagged with one or more of these keywords: sears ss16

Top