TEST OR INSPECTION
If system air pressure is below 85 psi (586 kPa), start vehicle engine and allow system
air pressure to build to at least 85 psi (586 kPa) (TM 9-2320-347-10). Shut off vehicle
engine (TM 9-2320-347-10). Turn battery disconnect switch to ON position (WP 0007).
Push and release agent discharge button on roof turret control handle (WP 0004),
check if roof turret valve operates to open position.
If roof turret valve does not operate, troubleshoot Roof Turret Does Not
Operate When Selected (WP 0116).