Quick view Add to Cart Replacement of Shunt Field Coils in Jack & Heintz Generators - Parts G300-4BT and G300-6BT Document Part Number: T.O. No. 8D6-5-6-507 Number of pages: 8Part Number: T.O. No. 8D6-5-6-507Revision Date: 5-Mar-1959 MSRP: Was: Now: $15.00