Joined
·
2,824 Posts
imported post
Still working on the 1980 GL1100. Many thanks to all of you with the help. The old girl is still not ready for certification, but getting close. All fluids have now been dumped and replenished. The brakes up front went very well with no problems, everything works and is now clean, lubed and up to snuff. The rear brakes showed their ugly side. The master cylinder looked like it was never off. There was more crud, crap and nasty stuff in it,not recognizable The rebuild went well, refit went well and so did the line drains, out for a quick test put her away and then discovered the circlip popped and then redid the whole thing again.
If you decide to clean up and redo your master cylinder for the rear end of a 1980 GL1100 take your time with it. The internal cups and plunger are simple yet well built, be sure to stay clean and wash it out with clean brake fluids and forget about using any cloths to wipe internally, simply pour your brake fluid over it.
The bellows (rubber cup) should be packed with high tempurature anti seize compound, and don't worry about the excess brake fluid draining out of the unit when you re install, do make sure you clean up well when done and be patient when bleeding the rear system, the plunger is tiny and it will take a while to get fluid back to the brake. You may even want to let the air bubbles rise so take it easy and take your time when bleeding.
Be careful when cleaning the interior of the cylinder since it will mark easy with any wire brush so be cautious and again take your time. A dental pick and soft copper or brass brush helps with the sticking crud.
Still working on the 1980 GL1100. Many thanks to all of you with the help. The old girl is still not ready for certification, but getting close. All fluids have now been dumped and replenished. The brakes up front went very well with no problems, everything works and is now clean, lubed and up to snuff. The rear brakes showed their ugly side. The master cylinder looked like it was never off. There was more crud, crap and nasty stuff in it,not recognizable The rebuild went well, refit went well and so did the line drains, out for a quick test put her away and then discovered the circlip popped and then redid the whole thing again.
If you decide to clean up and redo your master cylinder for the rear end of a 1980 GL1100 take your time with it. The internal cups and plunger are simple yet well built, be sure to stay clean and wash it out with clean brake fluids and forget about using any cloths to wipe internally, simply pour your brake fluid over it.
The bellows (rubber cup) should be packed with high tempurature anti seize compound, and don't worry about the excess brake fluid draining out of the unit when you re install, do make sure you clean up well when done and be patient when bleeding the rear system, the plunger is tiny and it will take a while to get fluid back to the brake. You may even want to let the air bubbles rise so take it easy and take your time when bleeding.
Be careful when cleaning the interior of the cylinder since it will mark easy with any wire brush so be cautious and again take your time. A dental pick and soft copper or brass brush helps with the sticking crud.