Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Can't get all the air out of Right Front Caliper brake line
So, I'm bleeding the integrated foot brake pedal system on my '87 GL1200A.

So far I've put 5 full master cylinders full of fresh fluid through the line to the right front caliper and I still have air bubbles coming out of it ! ! !

What the heck, just how long is that line that it can take this much fluid and still not be flushed out?

Any advice would be welcome.

Thanks!

'87 GL1200A - Black/Grey
'06 GL1800 - Arctic White
'81 CB750C - Blue/Blue
U.S. Navy SWO (1967 to 1976)
Quote this message in a reply
#1 05-17-2017, 02:29 PM
Why did you need to bleed the brakes?
Did you have the caliper off?
Is it just to change the fluid?

Give us some history, we can't guess what you did?

If your getting air out, it must be getting in, give us a clue

The only stupid questions are the one's that are not asked.

Quote this message in a reply
#2 05-17-2017, 06:07 PM
It was time to do it. Two years on the existing fluid, plus the foot pedal was starting to feel a bit spongy. So, just changing fluid. No parts removed.

After five MCs full of new fluid I have nice clean fluid coming out of the caliper bleed, but still with air bubbles in it.

No, I did not let the fluid level in the MC get too low and suck air into the line.

I think maybe I'll bleed the rear caliper now and see if that makes any difference going back to the front later. The FSM says to bleed the right front caliper first and then the rear caliper, so I'm following procedure.

***

'87 GL1200A - Black/Grey
'06 GL1800 - Arctic White
'81 CB750C - Blue/Blue
U.S. Navy SWO (1967 to 1976)
Quote this message in a reply
#3 05-17-2017, 06:41 PM
Are you using a vacuum bleeder?
If so the air is likely entering through the bleed screw threads in which case you're done and good to go.

Ken.
Quote this message in a reply
#4 05-17-2017, 08:23 PM
(05-17-2017 08:23 PM)K Bergen Wrote:  Are you using a vacuum bleeder?
If so the air is likely entering through the bleed screw threads in which case you're done and good to go.

Not using a vacuum bleeder, but I'm beginning to think that the air is coming through the bleed screw threads like you say.

Giving up for the night. Will pick up on it again tomorrow and see how it goes.

***

'87 GL1200A - Black/Grey
'06 GL1800 - Arctic White
'81 CB750C - Blue/Blue
U.S. Navy SWO (1967 to 1976)
Quote this message in a reply
#5 05-17-2017, 09:07 PM
I vote that these are air bubbles from the bleed screw threads. When did the fluid change-out this season, the 0.25 inch tubing that I had was a little too large for the bleed screw and would come off easy. You can try to put some lubricant on the bleed screw threads to seal off the air coming through. Good luck.

- P
Quote this message in a reply
#6 05-18-2017, 08:25 AM
Well, the job is done, the brakes all buttoned back up, and all is well. The pedal is firm now and the mushiness gone.

Air must have been coming in around the bleed screw threads as suggested by some.

I think I'll get a set of speed bleeders for the bike and replace the original bleed screws with them. Perhaps they'll fit a bit tighter, plus make the job easier as well.

Thanks for the help!

'87 GL1200A - Black/Grey
'06 GL1800 - Arctic White
'81 CB750C - Blue/Blue
U.S. Navy SWO (1967 to 1976)
Quote this message in a reply
#7 05-19-2017, 07:49 AM
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Front brake problem bagelboy 4 693 05-11-2015 10:35 PM
Last Post: bagelboy
  front right caliper ironhead1970 3 561 02-26-2014 11:14 PM
Last Post: old gold
  Front Brake Huge Improvement wilmas2cool 7 824 11-23-2013 09:33 AM
Last Post: wingandaprayer
  1985 GL1200I Front Brake Bleed WAC1972 15 1,508 10-11-2013 05:23 AM
Last Post: admin
  Front right brake problem charron.bob 1 233 04-21-2013 06:32 PM
Last Post: charron.bob
  Front Brake Bleed gclave 3 237 01-26-2013 05:42 PM
Last Post: gclave
  Stuck brake line worfccrmc 3 226 07-02-2012 04:27 PM
Last Post: seabee
  Front fork oil leaking from air discharge line wingandaprayer 7 450 06-25-2012 06:40 AM
Last Post: wingandaprayer
  rear brake line Usblack129 5 382 06-16-2012 08:30 PM
Last Post: Usblack129
  Left Front Caliper seals Mr. Ed 3 241 05-24-2012 04:47 PM
Last Post: 861200GW

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us | GL1200 GOLDWINGS | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication
google-site-verification: googled4b4fe31e07b65d8.html