149 Starter Generator/Charging Woes

[kweimann]

Working on a friend's 149 did 12 v test and S/G ramps up then brakes when F terminal is energized. VR hasn't worked in years. Was told the Armature stud on the S/G should be putting out 14 or more volts, it's only putting out 3 volts. Any ideas? VR is not connected, battery new and fully charged. Grounded the field terminal and the ammeter jumps to full charge so I thing the S/G is ok. Thanks

 

[mgonitzke]

Armature is the starter side...shouldn't be output from that with the tractor running. 14V+ from the FIELD terminal would be normal. Everything else you describe indicates the starter/generator is functioning properly. Not sure what the question is here.

 

[kweimann]

Ironically, I get 3vdc from EITHER terminal to ground.

 

[kweimann]

Armature is the starter side...shouldn't be output from that with the tractor running. 14V+ from the FIELD terminal would be normal. Everything else you describe indicates the starter/generator is functioning properly. Not sure what the question is here.

Why only 3 vdc from the field terminal?

 

[lpalma]

Good reading...

 

[kweimann]

Well, I ordered the Correct, albeit Expensive Voltage Regultor off of Ebay and now she is charging just fine. A word to the wise, when I first started it up she spiked at 17 volts. I ran it for a few minutes like that, shut it off, then restarted it a few minutes later and she was at 14.7/14.8 vdc charging. All good now,

Link to the video


Link to Ebay ad for the regulator
https://www.ebay.com/itm/285144797340

Thanks,
Kenny

 

[Eric Wittersheim]

Thanks Kenny,
I'm going through the same thing my self with a 129. I ordered a regulator from the ebay link. Fingers crossed it fixes my problems like it fixed yours.

 

[kweimann]

Customer called me yesterday, she's working and charging great!

 

[Eric Wittersheim]

Unfotunately for me the new VR didn't change my problems. I will look to get my starter generator rebuilt.