The items of diesel concrete mixer machine to check and maintain yearly：
1. The lubricating oil of reduction gearbox must be completely replaced.
2. The pressure oil of discharge gate pump must be completely replaced.
3. To check the degree of wear and leakage about sealing element of four spindle noses of stirring shaft, and accordingly that to determine whether the spare and accessory parts of sealing system need to be replaced.
Note: The appearance of concrete mixer need to keep cleaning.The concrete mixer in the mixing process, must be used to clean the interior. The concrete residues that stick in the interior, blades, shaft arms, spindles are required to completely remove after working everyday.