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BB, although you may well need a new one, I wouldnt give up on the old one just yet if it were mine. I would first check, maybe remove clean n wire brush its (VR) mounting and hardware to insure a good ground connection to the Generators frame and also that the Generator is well grounded to the tractor. Then you might wanna remove, clean n wire brush all its wiring connections and reconnect everything. Then repeat the tests I posted to determine if its a VR or a Generator problem: When running, ground the Gens Field post and if it charges then, the VR may be bad,,,,, or the wire from Gens Field to VR's FLD Terminal is open,,,,, , or the VR has a poor ground. If still no charge, leave Field grounded and jump the VR's BAT and GEN (or ARM) terminals together and if it charges then, the VR is likely bad (cutout relay) or mis adjusted. Another possibility that could cause non charging until you hammer n vibrate things (when you hit VR you may be vibrating Generator) could be worn Generator brushes or corroded stickign hold down brush assemblies. See if tapping the Gen away from the VR makes her charge?? If so, inspect the brushes and insure the hold down assemblies are working and pushing the brushes tight down against the commutator. If all the tests indicate the VR is well grounded to the Generator and the Gen itself is well grounded and the VR's connections are all good, but it takes tapping on the VR to get her to charge, it likely has some burned or sticking relays and contacts and needs replaced. Its been my experience that once relay contacts get burned and carboned up and/or begin to stick, even if you can get them working or you have to hammer on it to make them work, its not much count and is gonna need replaced. The tests above and the Motor tests I gave you in my original post pretty well tell you if its a VR or a Generator problem, so if the Generator is good (charges if VR by passed per above plus passes Motor test) and even if all grounds n conenctions are good you still have to beat the VR to make her work, its probably time to invest in a new unit. Post back or e mail [email protected] any questions. Good luck n God Bless John T
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