1 Reasonable structure excavator long reach front are designed on base of lever principle and stress analysis, it is wise and reasonable to reinforce some critical areas, such as hinges, and you can see multi-plate or gussets welded on these areas. most supplier designed stiffener plate inside of boom arm that play a important role for distribute stress and increase product lifetime.
2, Material used for boom arm: with many years of experiences of making long front,we think a kind of at least 350 Mpa steel is needed, and sometimes higher strength material is required for big machine.
3, check welding, good welding line is evenly, 1-2cm high, and before welding, bevelling steel plate that can increase welding area
4,paiting, good painting can protect steel from quick rusting that will extend product lifetime, it is also necessary to repaint if painting scratched during transportation.
5,Pin Hole: make sure pin hole is concentric circle, perpendicular to boom left and right size plates.
6,Hydraulic pipeline: all pipeline are absolutely clean and there is dust cap on pipe ends.
