cut out to voltage regulator

make sure regualtor is an A circuit job.

With it all hooke dup.. grounding the field shoul make quite a charge at mid throttle.. if not.. I'd say genny is shot..

The genny on my Allis G is only a 7a job.. these things aren't power houses.. and they do wear out..

Carry it to a mom n pop rebuilder shop

soundguy

The only true test (if battery is okay) is what the battery voltage is doing and a good genny n VR ought to raise it from 6.3 volts to at least 6.5 n more indicatimg its charging. Those open circuit genny voltage tests dont tell me much.

The only other VR by pass test is to jump the VR"s internal Cutout Relay when shes running by momentarily connecting its BAT and GEN/ARM terminals together to see if she charges and the battery voltage raises then and if so but NOT otherwise, then I suspect the VR"s cutout relay isnt ever closing.

Still sounds more like a weak genny for now, check for a 3rd brush and adjust it to max charge n try her with the gennys field dead grounded and the internal cutout relay by passed n if still no charge (IF battery is okay) after cranking and light use which ought to run the battery down a bit, I suspect the genny is weak.

You could also remove the belt n try to motor the genny n see how it performs??

John T

First thing Id do is by pass the VR functions to see just how well the genny charges then at the max possible charge condition. To do that dead ground the gennys Field post to the case n see how many amps she charges then????? ?? If its still low I suspect either the genny is weak,,,,, ,or the belts loose,,,,, ,,,,,or the genny dont have a good frame ground. If it charges MUCH higher then (with gennys field dead grounded), that tells me the genny is okay so the problem is either, the VR,,,,, ,,, or the wire from Field on genny to Fld on VR is bad,,,,, ,,, or the VR isnt well grounded to the genny.

This assumes the battery itself is good and capable of accepting a charge, is it okay and/or has it been load tested????? ?

If its a three brush genny and you convert from a cutout relay to a VR, I set the third asjustable brush to the MAX charge position which is as close as possible to the other brush next to it. If its far away that limits the gennys output.

JS had good tips on basic genny maintenance, the commutator must be clean n bright, the brushes not worn too low and the brush hold down spring assemblies need to be clean n free so they hold the brushes tight down against the commutator.

Let us know

John T