1, the operation of the transmission device should be smooth, the connection between the parts should be reliable; Gear meshing should be good in gear transmission mode, lateral clearance should not be greater than 1.5-3mm, radial clearance should not be greater than 4-6mm, radial run-out of large gear should not be greater than 3mm; The radial run-out of pinion shall not be greater than 0.05mm; JZM, type, rubber roller and raceway should be in good contact, there should be no run-out and deviation, the roller and raceway wear should not exceed 30% of the original thickness;

2, the belt should be appropriate, stress should be uniform, there should be no fracture; Chain, sprocket wheel should not bite teeth;
3. The roller and supporting wheel of the upper hopper shall be in good condition and wear shall not exceed the provisions;
4, reducer box operation should not be abnormal sound, sealing should be good, there should be no oil leakage;
5, the concrete mixer with tires, the tire pressure should comply with the provisions of the specification, the bolts should be intact, complete, not loose;
6, clutch power transfer should be effective, separation should be; The brake should be sensitive and reliable. The above contents are sorted out according to the problems encountered in the actual work of students, for reference, if there are problems, please timely communication, correction.