1. When using a new mixer truck, the bolted connection between the cement tank support and the vehicle chassis should be fastened in time. In the early use process, regularly check the connection between the cement tank support and the vehicle chassis to confirm whether it can be used normally.

2. The capacity, quality and slump of the conveyed concrete shall comply with the regulations in the vehicle instruction manual, and lubricating oil shall be added in time.

3. For concrete mixer trucks parked in the open air, the mixing drum should be rotated in the discharge direction before charging, and the water in the cement tank should be drained to ensure the quality of the delivered concrete.