1) engine parts shall be carried out according to the relevant provisions of general operating procedures.
2) the signal should be sent out before the engine is started or operated.
3) check the leakage of the hydraulic system; the tire type excavator should check whether the tire is in good condition and the pressure is in accordance with the regulations; check the transmission device, the brake system, the rotary mechanism and instrument, the instrument and the test operation, and confirm that the normal rear is allowed to enter the operation state.
4) the detailed understanding of the construction and site conditions. Check the stability and stability of the excavator's downtime soil. The tyre excavator should be supported to keep it stable and reliable. Check the stability of cutting and trench side slopes to prevent overturning of excavators.
5) no personnel in the area should be allowed to stay in the excavator area, and no independent personnel are allowed to enter the cab.
6) excavator operation site should have dump trucks in and out of the road.
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