How to identify good or bad planetary concrete mixer

BONA manufacturer teaches you when buying planetary concrete mixer from what can accurately identify this concrete mixer is good or bad from the following aspects:First, the operation of the transmission system to be flexible, there is no abnormal noise;Second, belt conveyors, bucket elevators and other transmission to the cantilever Dragline smooth operation to be flexible, braking can be high, there is no unusual noise, no card chain;Third, the metering system also checks is also very important to check the metering system sensitivity and accuracy;Fourth, reducing machine elevated temperatures should note that to reach a temperature of qualified book;Fifth, to smooth out the material, the material does not appear plot , flash and so on; sixth, valve leakage phenomenon can not occur.