This paper describes

This paper describes the taper roller bearing essentials luffing crane tires and precautions

  (1) Boom decrease (from arm). Pull back the joystick, foot pedal control luffing speed. Observe Change
Motor current, the current value <55A, the amplitude of continuous operation with a load; current exceeds 55A Time (Jm: <70A), the starting time should be less than one arm of the operating cycle time of 15%.
     (2) Boom increase (drop arm). Push the joystick forward, feet stepped on the accelerator pedal to control the speed. Note that the first case at idle push the handle, and then gradually increase the throttle, voltage <80v.
     (3) lL stop luffing jib (keep working range). The handle is placed in situ (middle position), to ensure amplitude limit device to work properly and Renzi Jia should rise to the highest position (ground 4413mm).