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techtalk:ref:wheels07 [2025/10/14 16:14] – [Bore Damage] hippysmacktechtalk:ref:wheels07 [2025/10/15 14:22] (current) – [Flared Fitting Gasket] hippysmack
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 ====== REF: Wheels, Brakes & Tires ====== ====== REF: Wheels, Brakes & Tires ======
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-====== Master Cylinder Repair ======+====== Caliper / Master Cylinder Repair ======
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 ====== Bore Damage ====== ====== Bore Damage ======
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 {{:techtalk:ref:tools:master_cylinder_bore_repair_3_by_bustert.jpg?direct&300|}} ((photo by bustert of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/165507-master-cylinder-boring-out-from-9-16-to-11-16?t=1780101)) \\ {{:techtalk:ref:tools:master_cylinder_bore_repair_3_by_bustert.jpg?direct&300|}} ((photo by bustert of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/165507-master-cylinder-boring-out-from-9-16-to-11-16?t=1780101)) \\
  
-====== Flare fitting Seat Repair ======+====== Flare Fitting Seat Repair ====== 
 +===== Flared Fitting Gasket ===== 
 +A flare fitting gasket is used to prevent leaks from temperature fluctuations and vibration that can loosen flared tube fittings. \\ 
 +It installs over the flared "cone" of a flared fitting / tubing and provides a seal between the mating flared connections. \\ 
 +Flare fitting gaskets are available in both 37° and 45° angles, various materials, various tube sizes and from various manufacturers and suppliers. \\ 
 + 
 +These are not actually designed to repair damaged flare seats but have been used for that application on motorcycles as well as cars and trucks. \\ 
 +It is also not meant to refurbish a leaky or damaged flared tubing end. \\ 
 +With brake lines having double flares, it is bettter to cut off the damaged or stressed flared tubing end and re-flare the tube. \\ 
 + 
 +In general, you should match your gasket material to your fitting material. But, if you have a brass fitting, you can use a copper gasket. Gaskets without a coating are best for fittings that are exposed to harsh chemicals, such as antifreeze, which can dissolve the threadlocker coating. Threadlocker-coated gaskets offer a more secure hold than uncoated gaskets, so they’re best for areas with high vibration. ((https://www.mcmaster.com/products/flared-tube-fitting-gaskets/)) \\ 
 + 
 +A Parker brass 45° flared fitting gasket is basically an uncoated flared brass washer. Suitable for use in air, water, and oil applications. \\ 
 +The 1974-1977 pie caliper below has a damaged flare seat that was repaired using a 3/16" flare gasket. \\ 
 +So if the flared seat is damaged and leaking and before trashing the caliper, there's a chance it can be sealed using one of these. ((Fizzle of the XLFORUM)) \\ 
 +Just drop it down (big end) over the existing flare and install the flared tubing and threaded nut as usual. \\ 
 +{{:techtalk:ref:wheels:1974-1977_xl_brake_caliper_damaged_flare_seat_repair_by_fizzle.jpg?direct&400|}} ((photos by Fizzle of the XLFORUM)) \\
  
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Trace: • MiscRes: Harley and Buell Tech Tips (TT), (TA), (BB)