*Check the appearance: ensure that the appearance is smooth and free of damage, and the paint surfaceis clean to prevent accidental vehicles from happening.

*Real manufacture date: judging the real date of the excavator by checking the production date of themain components such as glass, engine nameplate, hydraulic pump nameplate, etc.

*Working device: check the wear of the bucket and pin shaft of the whole excavator, check and repair themain components such as the chain plate, chain rail, oil cylinder, oil pipe, etc.

*Hydraulic system: Check the main hydraulic components such as hydraulic main pump, throttle valvemotor, rotary reducer, etc. to ensure that there is no leakage and work normally.

*Engine: Observe the exhaust gas and water temperature of the engine through idle speed, mediumthrottle and deep throttle, check the radiator to ensure that the cooling function, the power output is stablethe radiator no water leakage.

*Vehicle circuit: Check the vehicle lights, instrument panel, and electrical components in the cab to ensurenormal operation and no fault codes.