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TM 5-2420-224-20-1
To perform some maintenance procedures, the crane must be placed in a three-point stance
(1). The outer boom (2) is positioned on the ground using caution not to damage hook on boom
end. The amount of extension will depend on the task being performed.
Turn engine off. Move control levers in both directions 3-4 times.
Turn engine off. Depress air relief valves (1) and hold until all air has escaped from air tanks (2).
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