Y- 6
Y- 6
Assembly Adjustment (Crane Operation) ○Method B (Case where the machining surface on the swing bearing cannot be used) 1. If the machining surface on the swing bearing is not exposed, place bubble levels on the base plate on the swing table with the boom directed to over-front. Then extend the jacks to set the machine level in lateral and longitudinal directions. (*3) After leveling the machine, make sure that the jack floats are not shaky. 2. In this condition, swing the boom by 360° and check the movement of bubbles in the levels. If the swing table plane is level, bubbles hardly move during swing of the boom. If the bubbles move during swing of the boom, estimate the inclination of the swing table plane from the movement of the bubbles and operate the jacks for fine adjustments. 3. Repeat the above-mentioned check and fine adjustments until the bubbles in the levels hardly move during swing of the boom. After final fine adjustment, reset the bubble levels (*4) and swing the boom by 360° again to check the movement of the bubbles.
*1: "Swing table plane" refers to the virtual surface on which the upper structure of the crane swings. In mechanical structure, it corresponds to the machining surface on the swing bearing. *2: Apply this procedure when readjusting. *3: Level the machine by extending the jacks. If jacks are retracted for adjustment, the jack floats may become clear of the ground. *4: If the place where bubble levels are placed is not parallel to the swing table plane when performing the method B, resettable bubble levels are required.
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WY05-2021E
