Some aircraft have a manual fire wall shutoff valve operated by cable linkage.
Some aircraft use the needle-type shutoff valve in their landing gear and bomb bay systems.
This needle-type valve consists of a handle, stem and valve, and body. Turning the handle in a clockwise direction places the valve on its seat within the body, stopping the flow of fluid. These shutoff valves are used during maintenance to shut off hydraulic fluid to the subsystems, thus allowing maintenance personnel to work safely in the wheelwell and bomb bay areas. Also, by closing the particular valve a desired amount, the speed of the operating unit can be controlled to aid in observing the sequence and full operation of the components being operated. Fluid coolers are installed in systems in which the temperature of the fluid is likely to exceed the maximum allowable limit.