clutch master cylinder rebuild


Information and questions on GL1200 Goldwings (1984-1987)
Post Reply
ironranger
Posts: 15
Joined: Mon Jun 18, 2018 2:25 pm
Location: Sault Ste. Marie, ON, Canada
Motorcycle: 1984 GL1200I Interstate

clutch master cylinder rebuild

Post by ironranger »



Last week while riding I lost all my clutch hydraulics. Put a new kit in the clutch master cylinder and have tried to bleed it. Loosened the banjo bolt first to clear the air out of the master cylinder and then tried to bleed it. Didn't work --so tried a reverse bleed. Nothing so far. Have used 1/2 quart brake fluid so far. Any other suggestions would help. 84 Interstate Thanks


ksigurdsen
Posts: 21
Joined: Tue Dec 10, 2013 7:49 pm
Location: West Palm Beach, FL
Motorcycle: 1984 GL1200A Aspencade

Re: clutch master cylinder rebuild

Post by ksigurdsen »

I have used a 2-step process on my 1984 Aspencade. 1) Use a master cylinder bench bleeding kit to get the bubbles out of the master cylinder. Put a plastic fitting (in place of the banjo fitting / brake hose) then loop the clear tubing back into the reservoir. You can see the air move as you press the piston. I use a screw driver to stroke the piston fully, not the clutch lever. 2) Connect the banjo fitting / brake hose back then use a Mighty Vac vacuum bleeder to get the air out of the brake line via the slave cylinder. There are other ways but this is the one I prefer.
Attachments




User avatar
WingAdmin
Site Admin
Posts: 22508
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer
Contact:

Re: clutch master cylinder rebuild

Post by WingAdmin »

ironranger wrote: Mon May 17, 2021 9:00 pm Last week while riding I lost all my clutch hydraulics. Put a new kit in the clutch master cylinder and have tried to bleed it. Loosened the banjo bolt first to clear the air out of the master cylinder and then tried to bleed it. Didn't work --so tried a reverse bleed. Nothing so far. Have used 1/2 quart brake fluid so far. Any other suggestions would help. 84 Interstate Thanks
When you say you "lost all your clutch hydraulics" - what do you mean by this? The clutch fluid leaked out? The clutch stopped working? You said you rebuilt the master cylinder but that it's still not working and you can't bleed it. Is it possible the problem is with the slave cylinder?
ironranger
Posts: 15
Joined: Mon Jun 18, 2018 2:25 pm
Location: Sault Ste. Marie, ON, Canada
Motorcycle: 1984 GL1200I Interstate

Re: clutch master cylinder rebuild

Post by ironranger »

I did not lose any fluid or have any leaks. The clutch lever just finally had no resistance to hydraulics.
I assumed the master cylinder seals had failed. I considered the slave cylinder but I am unaware as to how to verify that is the problem. Will have a vacuum bleeder in a couple of days and will try that.
Thanks
ironranger
Posts: 15
Joined: Mon Jun 18, 2018 2:25 pm
Location: Sault Ste. Marie, ON, Canada
Motorcycle: 1984 GL1200I Interstate

Re: clutch master cylinder rebuild

Post by ironranger »

Many thanks to ksigurdsen----tried your two step method and it works perfectly. Thanks for all your help. Took less than 20 min. Would suggest this method for all Goldwing owners.
Iron Ranger-now I can ride again.


Post Reply