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A full fledged regulator (versus a 2 wire cutout relay and light switch control) wont help a weak genny charge much better assuming the wiring and light switch control are all okay HOWEVER it can do a better job of automatically keeping it charged and preventing overcharge. If you have a 3 brush genny you can adjust the third moveable brush closer to the fixed brush beside it which will increase the charge rate. I will paste a portion of my Troubleshooting Procedure for non charging below so run thru it and make sure the belt is good n tight and shes wired right n the conections are good and it will help determine if weak or non charging is a genny problem or not. If youre gonna change to a VR Id go ahead n set the third brush to max charge anyway first. TO DETERMINE IF ITS A GEN OR VR OR CUTOUT RELAY PROBLEM 5. a) VOLTAGE REGULATOR SYSTEM: With the tractor running, temporarily ground the Gens Field post to case. If she charges then but NOT otherwise, the VR may be bad, or a wires missing from VR's Field post to the Field terminal on the VR, or the VR isn’t well grounded. b) IF IT’S A CUTOUT RELAY SYSTEM and she charges only if you dead ground the Field but NOT otherwise, its either a bad switch or the switch isn’t well grounded or else the wires bad or open from the Gens Field post up to the switch. INSURE THAT GOOD SWITCH GROUND AND WIRING 6. If she still don’t charge, leave the Field grounded and jump a wire across from the VR or Cutout Relays BAT terminal over to its GEN terminal (jump by passes the cutout relay) and see if she charges. If then but not otherwise, a VR's cutout relay isn’t working correct (maybe points burned/carboned) or a Cutout Relays NOT working or not wired correct. 7. With the 2 steps above, you have basically by passed the VR or Cutout relays functions, so if she still don’t charge, you're left with a bad battery or wiring or the Gen itself. 8. MOTOR TEST. You can Motor test the Gen. If its grounded and you remove the belt and apply hot battery voltage direct to its ARM Post and have the Field Post dead grounded to frame, it should motor n run well (Armature n Brushes and Commutator likely okay). Then, if you next remove the Fields ground and it speeds up some, the Fields probably good. If it passes both those tests, it should charge, and if not, it may be a wiring or battery or grounding problem. The hot battery voltage may be taken off the VR's BAT terminal or the starter post or the battery itself for this test. John T
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