11-12-2022, 07:18 AM
Jack, the next try is to remove the radiator cap on top of the heater, fill the coolant tank with distilled water to completely full. Attach a radiator pressure tester and pump up to 15 psi and turn on the pumps. That will prime the pumps.
If pumps are running and fans blowing cool air then priming followed by another rap on the check valve will get you going. Only rap the valve with pump running.
If pumps are running and fans blowing cool air then priming followed by another rap on the check valve will get you going. Only rap the valve with pump running.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area