TM 9-2350-287-10UPPER REAR DOOR CYLINDER: Hydraulically opens and closes the upper rear door (ballistic shield).FLOW-CONTROL VALVE: An adjustable valve that enables smooth closing of the upper rear door (ballistic shield). Thisvalve is preset at the factory and should not require adjustment.PILOT CHECK VALVE: Prevents dangerous door drop if hydraulic line ruptures.DUMP VALVE: Enables the operator to close the door if hydraulic power is lost. This is accomplished by opening thedump valve and then shifting BALLISTIC SHIELD directional control valve, located on the hydraulic control panel, to thedown position.1-15
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