If special emergency hydraulic pump can be twisted the knob to the short circuit state, make the hydraulic oil but pilot valve directly to the operating handle oil. This state is important to note: at this time no switch lever, has been in the open state, don't touch the stop lever operation. 6. The light doesn't work the sudden extinction of lights in the night work sometimes encounter situation, be sure to keep calm at this moment. First of all check the bulbs have any damage, then check the fuse are in good condition. If these are no matter use, it will call the repairman. Watching the guizhou libo excavator maintenance point no.6 middle school teacher was telling the excavator working meet sudden failure phenomenon, you learned how to deal with?