In order to ensure that the fluid is not lost during replacement of any line or any hose, one must first ensure that the master cylster reservoir cap is removed and sealed using cellophane to ensure there is no air leakage. Plug or cap hoses and lines immediately after disconnection to ensure that dirt does not access the system and a rag should be placed under any fitting to support spilled fluids. When unloading a flexible hose, loosen the nut of the fitting of brake line then loosen spring clip that offers the hose. When unscrewing fitting nuts it is better to use a flare-nut wrench of the correct size to ensure that corners are rounded off. Wipe the fitting and area around with clean cloth and make special notes on connections in case of more than one fitting. In replacing brake lines, it is important to use the right parts, not copper tubing, and prefabricated steel brake line with flared ends and installed fittings are a good choice. When you are to use straight steel tubing, make sure to bend it without kinking it with a bending tool. Installation At the time of installation, do not over tighten fitting nuts, a well-functioning joint will not need a lot of force. Make sure that lines and hoses are correctly laid, not kinked, clipped or bracketed and there is enough space between them and moving or hot parts. Once installed, take off the cellophane on the reservoir, bleed the hydraulic system and wipe off spilled fluid, and verify that it is not leaking.