How to fix dead Ultegra 6870 GS rear derailleur

A step by step guide how to take Shimano Ultegra RD-R8050-SS apart, diagnose faults, and reassembly it. Please take extra care when working with power tools, knives, and soldering irons. Always wear appropriate PPE. If in doubt, please contact professional. Ultegra RD R8050 SS video:    • Shimano Ultegra RD R8050 SS Disassembly, D...   www.bettershifting.com - Everything you want or need to know about Shimano Di2 components and much more. www.recyclist.cc - 2nd hand bike parts Video chapters 0:00 Intro 0:28 BetterShifting.com 0:48 Servo removal 3:41 Servo internals & assessment 5:38 Gearbox disassembly 7:42 Motor bracket reassembly 8:32 O-ring service 9:23 Gear box reassembly 14:20 Gear position reset 15:22 Sealing back servo casing 15:55 Derailleur reassembly 17:07 Adjustments & cam disc installation 21:50 Outro Disclaimer The information contained within this video is for general information purposes only. Di2_GP assumes no responsibility for errors or omissions in the contents of the video In no event shall Di2_GP be liable for any special, direct, indirect, consequential, or incidental damages or any damages whatsoever, whether in an action of contract, negligence or other tort, arising out of or in connection with the use of this video or the contents of Di2_GP YouTube channel. Di2_GP reserves the right to make additions, deletions, or modifications to the contents on the video at any time without prior notice. #di2 #diy #rideshimano #shimano #cycling #broken #shifting #howto