rdeanrj58 68 #1 Posted December 2, 2018 So I put a used VR on my S/G 867. With my meter hooked to battery it shows 12.5 with engine off. When running at less than half throttle it shows 17. I feel that is too high. Is there a way to adjust regulator? I tried playing with the adjustment screws on the points but it made no difference 1 Share this post Link to post Share on other sites
slammer302 2,155 #2 Posted December 2, 2018 If it's the old starter generator style the voltage regulator has adjustment screw somewhere inside. 1 Share this post Link to post Share on other sites
953 nut 54,850 #3 Posted December 3, 2018 The starter/generator section of this manual gives a lot of information on the regulator, hope this is helpful. Share this post Link to post Share on other sites
rdeanrj58 68 #4 Posted December 3, 2018 Yes thanks 953 nut . That looks very helpful. I will dig into it tomorrow evening 1 Share this post Link to post Share on other sites
Sarge 3,462 #5 Posted December 3, 2018 Make absolutely certain you have clean grounds in the whole system, especially between the engine/frame/battery/starter-gen. Without them, the regulator cannot properly react to the system voltage from the battery and can shoot the charging voltage too high - cooking the battery. It's the same issue with the later stator systems, they have to be able to correctly read the battery voltage. Adjusting the regulator cutoff voltage setting for a starter-gen can get a bit complicated - but it could be from someone filing the contacts as well in the past. Sarge 1 Share this post Link to post Share on other sites
rdeanrj58 68 #6 Posted December 4, 2018 Well I checked out everything it said in the manual to the best of my ability. And checked the ground connections. Still the same thing. Putting out 17 volts 1 Share this post Link to post Share on other sites
953 nut 54,850 #7 Posted December 4, 2018 Guess it is time to buy a new VR. Share this post Link to post Share on other sites
rdeanrj58 68 #8 Posted December 4, 2018 Guess so. Know any sources for these 4 terminal regulators? Besides eBay Share this post Link to post Share on other sites
wallfish 16,927 #9 Posted December 4, 2018 39 minutes ago, rdeanrj58 said: Guess so. Know any sources for these 4 terminal regulators? Besides eBay https://www.tractorsupply.com/tsc/product/tisco-voltage-regulator-vr1816?cm_vc=-10005 Share this post Link to post Share on other sites
pfrederi 17,583 #11 Posted December 4, 2018 You can use a 3 terminal regulator just as well...They are usually cheaper/ more available. 1 Share this post Link to post Share on other sites
rdeanrj58 68 #12 Posted December 4, 2018 Does a 3 terminal actually work? I bought a tractor once that had a 3 terminal and it wasn't charging. I thought it was because it had the wrong regulator Share this post Link to post Share on other sites
pfrederi 17,583 #13 Posted December 5, 2018 15 hours ago, rdeanrj58 said: Does a 3 terminal actually work? I bought a tractor once that had a 3 terminal and it wasn't charging. I thought it was because it had the wrong regulator Three terminal ones work just fine. Put one on my friends 856. Share this post Link to post Share on other sites
