PB3000 User Manual
9
Chapter 3 Troubleshoot
1) If the boom fails to fall into a level position, adjust position A; if the boom fails to be lifted upright, adjust
position B. See Figure 3-1.
2) If the boom shakes during falling or lifting, adjust position C. The shaking that occurs during lifting is caused by
the overlarge spring force. In this case, loosen the screws. If the boom shakes during falling, tighten the screws.
See Figure 3-2.
3) Use the motor handle to lift the boom in the case of a power failure, See Figure 3-3.
Figure 3-1 Figure 3-2 Figure 3-3
Position C
Position A
Position B
Handle
