Need diagram on how install rebuild kit in 1973 Harley FLH rear master cyclinder.

Question edited for clarity, full 'year make model'.
Question moved from Computers and Internet.

Check out the videos.

https://www.google.com/search?q=1973+harley+davidson+flh+electra+glide+replace+carburetor

Service Manual. Not the best quality, but there are others
https://www.google.com/search?q=1973+harley+davidson+flh+electra+glide+service+manual

1970-78 Electra Glide/Super Glide Service Manual

https://www.ratbikeservice.com > dwnld > 1970-7...
PDF
The maintenance and repair information in this manual applies to the 1970 through early 1978 (up to January 1, 1978 production) Electra Glide/Super Glide Models.
251 pages

This is unusual as I ride a 1994 model and have yet to have to rebuild the master cylinders. But, if they are leaking, it's time for a rebuild. You can buy the rebuild kits either through Harley or aftermarket. Simply disassemble the master cylinders, lightly hone the bores with a flex hone, and install the new kit. Make sure you use the correct type of brake fluid and do not mix different types of fluid. This may be what is wrong with your master cylinders now, mixed brake fluid. If it looks like someone blew their nose in your master cylinders, that's what happened. In this case, once you get the master cylinders rebuilt, you need the bleed the system throughly to clean out the calipers and hose as well.

Good Luck
Steve

brake fluid should be changed a least once a year so check to see what type of fluid you need and bleed the system i myself use a mini-vac for this. make sure you do this several times and push your brake pedal slowly to get pressure do not pump, this creates little air bubbles.only crack the bleed screw enough for the fluid to pass thru. If this does not cure your problem you may need a new master cyclinder and or rebuild kit for the calitper good luck