01-01-2021, 06:59 AM
I use a radiator pressure tester to put 15 psi in the coolant tank at the radiator filler neck. Make sure the coolant tank is lipping full. Turn the pump(s) ON and they will prime right away.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area