T M 9 - 2 3 2 0 - 2 7 9 - 1 0 - 1M983 Tractor Operating Procedures (Cont)(1) Push swing lever (1) up to rotate crane clockwise. Pull lever (1) downto rotate crane counterclockwise.(2) Pull boom lever (2) down to raise boom (3). Push boom lever up tolower boom.C A U T I O NWhen boom is being extended, hoist lever must bepushed up to allow space between sheave at end ofboom and sheave at load hook to prevent cable frombreaking.(3) Push hoist lever (4) up to lower load hook (5).(4) At same time, push extend 1 + 2 lever (6) up to extend first andsecond stages of boom.(5) Push extend 3 + 4 lever (7) up to extend third and fourth stages ofboom (3).(6) Push hoist lever (4) up to lower load hook (5). Connect load straps orrigging to hook.(7) Pull hoist lever (4) down to raise load hook (5).(8) Pull extend 3 + 4 lever (7) down to retract third and fourth stages ofboom (3).(9) Pull hoist lever (4) down to raise load hook (5).(10) Pull extend 1 + 2 lever (6) down to retract first and second stages ofboom (3).(11) Pull hoist lever (4) down to raise load hook (5).2 - 3 39
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