2008 NEWMAR DUTCH STAR Engine And Engine Cooling Problems

I OWN A 1998 NEWMAR DUTCHSTAR ON A FREIGHTLINER CHASSIS WITH A 3126 CAT MOTOR. THE ISSUES OUTLINED BELOW BEGAN WHEN LOWERING THE JACKS. THEN SPREAD TO LOW SPEED RPMS AT DIFFERENT PERIODS OF OPERATION, CAUSING A TOTAL ELECTRICAL SYSTEM SHUT DOWN, (TO INCLUDE LIGHTS, POWER STEERING, POWER BRAKES, ENGINE, A/C, RADIO, ETC), THUS CAUSING A UNSAFE OPERATING CONDITION. OVER TIME THE ISSUE BEGAN DURING DIFFERENT OPERATIONAL PERIODS WHEN DIFFERENT ELECTRICAL DRAWS WERE PRESENT (SUCH AS WHILE USING LIGHTS, DEFROST AND WIPERS, ENGINE FAN COMING ON, ETC.). THIS ISSUE HAS ALSO BEEN OBSERVED WHEN THE ENGINE TEMPERATURE OF 182 DEGREES OR HIGHER IS REACHED. IN ALL CASES, AFTER APPROX 90 TO 120 SECONDS, THE POWER WILL RETURN AND ALLOW THE ENGINE TO BE RESTARTED. THIS IS A ONGOING ISSUE WITH NO KNOWN CAUSES, MINUS THE LISTED EXAMPLES OR ADDITIONAL UNKNOWN CAUSES. NONE OF THE 3 MAJOR MANUFACTURER'S OF THIS RV...