The paper's main focus will be on clean hydraulic hose assembly techniques and how to clean the assembly during fabrication. We will highlight different cleaning methods that are available and how effective they are. Hose Fabrication Equipment and its effect on generating internal contamination will be highlighted. ISO 4405 & 4406 cleanliness codes will be discussed. We will also show via video in the beginning of our paper the Cause & Effect that contamination has on a hydraulic system. The audience must grasp and understand contamination's cause and effect to realize how important clean hose assembly techniques are to their customers.