1. The pipeline shall be arranged in a neat line, easy to install and maintain, the assembly shall be firm, and the pipe bending shall be smooth and unwrinkled, etc.
2. The foundry cylinder shall not have the holes and pores, etc., which will affect the quality and performance of the product and the defects of the casting, and shall do the pressure test according to the regulations.
3. The parts should be kept clean during assembly. All working media (gas and oil) entering the core machine should be considered to ensure cleanliness and working oil should meet the prescribed standards.