This is a sequel to my problem with getting my generator to charge the battery on my MF 65.
After determining the old VR cutout relay (A to B) was bad, I obtained a new VR and tested it:
induce 12v to A, hear relay click, read 12v on B and L;
induce 12v to B or L, silence, read Zero v on A.
installed VR, checking grounds and that each terminal reads correctly as wires installed. When complete, prior to polarizing generator in preparation for start, terminals B and L read hot, A and F not, and ammeter is neutral.
Polarized generator: ground F, jump A to B, heard click and got spark. Ammeter reads full discharge -30A
Disconnect neg batt cable, when reconnected ammeter reads neutral.
Start tractor, as it comes up to speed ammeter reads -20A, tried accelerating to 1800 rpm, no change.
Shut down, switch off, ammeter reads -30A, until neg cable removed.
Am I far off in thinking that one of the relays in the VR is a reverse current cutout and that it should be opening when the generator isn't turning? If so, what makes it open when it should?
Any other ideas on what would be causing this discharge?
After determining the old VR cutout relay (A to B) was bad, I obtained a new VR and tested it:
induce 12v to A, hear relay click, read 12v on B and L;
induce 12v to B or L, silence, read Zero v on A.
installed VR, checking grounds and that each terminal reads correctly as wires installed. When complete, prior to polarizing generator in preparation for start, terminals B and L read hot, A and F not, and ammeter is neutral.
Polarized generator: ground F, jump A to B, heard click and got spark. Ammeter reads full discharge -30A
Disconnect neg batt cable, when reconnected ammeter reads neutral.
Start tractor, as it comes up to speed ammeter reads -20A, tried accelerating to 1800 rpm, no change.
Shut down, switch off, ammeter reads -30A, until neg cable removed.
Am I far off in thinking that one of the relays in the VR is a reverse current cutout and that it should be opening when the generator isn't turning? If so, what makes it open when it should?
Any other ideas on what would be causing this discharge?