TM 9-2350-267-10CREW CONTROLS AND INDICATORS - ContinuedUpper Rear Door - ContinuedUpper Rear DoorSwitch-BottomOperation of this switch is identical to topswitch.The bottom switch is positioned just in-side the left of the lower rear door, wellwithin reach of personnel outside vehicle.Upper Rear DoorDump ValveValve is used to permit opening and clos-ing of the door if hydraulic system fails.Opening the valve allows hydraulic fluidto bypass flow-restrictive devices in cir-cuit.The valve should be used only in emer-gencies to open or close door manually.2-13
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