Thoroughly clean the connection points and their surroundings with petrol.
Put the removed parts on a clean lining and cover. Use film or paper. Do not use rags with lint!
Exposed elements should be carefully covered or covered if they are not to be repaired immediately.
Install only clean parts. Remove spare parts from the packaging just before installing them.
With an open system: If possible, do not work with the compressed air system. If possible, do not move the car.