Case 430 12v generator

[Dave F.]

When I start the 430 (gas) I usally have to rev the engine up to get the gen lite to go out it takes it a while to go out. Is this the brushes in the generator need replacing? or is it a voltage reg, problem? If its brushes where can I get them & bearings its a prestolite generator. Thanks Dave F.

 

[JGarner]

I am not an expert in electrical items but here goes with my understanding.

This is the reason Detroit and then everybody making engines with "battery recharging devices" switched to the alternator. The alternator creates a 12V+ current no matter how fast it spins so it is putting out voltage to your VR and ultimately the system including the battery from the minute the engine starts.

A generator is RPM dependent. It doesn't get up to full charge current until the engine and consequently generator RPMs increase. When you start the tractor energy stored in the battery is diminshed (used)a bit dependeding on how long you have to crank to start and the generator light comes on when it starts showing the diminished voltage stored in the battery. Also takes battery energy to run at this point when idling. When you rev her up and the genertor begins to put out more current than the battery has stored it goes out and the battery is now being charged. The generator light is actualy a voltage sensing circuit and come on when system voltage is low than approximately 12V.