TM 9-2320-386-10 3-34 3-12. POWER STEERING ASSIST SYSTEM SERVICE General. Closing the manual shutoff valve must be done prior to inspecting and servicing the components of the power steering assist system. In the event of a cata- strophic failure of the power assist steering system, the manual shutoff valve can be closed and operation of the vehicle continued using manual steering. WARNING Manual shutoff valve must be closed prior to inspecting or servic- ing the power steering assist system. Small parts under pressure may shoot out with high velocity, causing injury to personnel. a. Raise and secure hood (para. 2-23). b. Close manual shutoff valve (1) on firewall (2). c. Turn steering wheel (3) back and forth to exhaust remaining air from power steering assist system. d. Check for loose, broken, or cracked air lines, and power steering assist compo- nents. Tighten loose fitting(s). Notify unit maintenance if power steering assist com- ponents are damaged. e. Open manual shutoff valve (1). 2 ~ 3 1