Tadano GR-700N, Руководство по обслуживанию

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Y-6 Y-6
Assembly Adjustment (Crane Operation)
56
WY05-3911E
○ Method B (Case where the machining surface on the slewing bearing cannot be used)
1. If the machining surface on the slewing bearing is not exposed, place bubble levels on the base plate
on the slewing 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, slew the boom by 360° and check the movement of bubbles in the levels. If the
slewing table plane is level, bubbles hardly move during slewing of the boom. If the bubbles move
during slewing of the boom, estimate the inclination of the slewing 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 slewing of the boom. After final fine adjustment, reset the bubble levels (*4) and slew the boom
by 360° again to check the movement of the bubbles.
*1: "Slewing table plane" refers to the virtual surface on which the upper structure of the crane slews.
In mechanical structure, it corresponds to the machining surface on the slewing 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 slewing table plane when performing the
method B, resettable bubble levels are required.