Bevin restored this 1956 Case VAC-14 for her FFA Ag. Mechanic Project. She used parts from Steiner’s in this restoration. She has currently won state competition in Ag.
Rob, in our technical department, recently found a document that provides really good troubleshooting information on antique tractor gauges. This pdf will explain the basic types of gauges
Internally resisted coils have an internal ballast resistor that does not reduce voltage until it warms up about 2 to 5 minutes. Cold it will read the same voltage