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GL1100 Brake bleeding question

557 Views 6 Replies 4 Participants Last post by  ghostvet, 
C
Just overhauled the brakes on my naked '82 GW: master cylinders, calipers rebuilt, new pads and SS lines that I bought from Andy. Also speed bleeders at each caliper.

When I did the bleeding I pumped and pumped fluid into a clean jar and it seemed to go on forever and there was still tiny bubbles. Closing the bleeders off the rear pedal was spungy. So I pushed it down hard and wedged a peice of wood between the pedal and the cylinder and left it over night. Next morning I took the wood out and the pedal was nice and solid. Or at least way more solid than the night before.

My question is: why does this work? Has the amount of air suspended in the fluid been reduced somehow? The brakes feel pretty good now so am I done?

Brian
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newday777
Did you bench bleed the master cylinders at the banjo bolts to get the main air out of the master cylinders before bleeding at calipers.

Speed bleeders have been known for 'tiny bubbles tiny bubbles', oh wrong time for that song! Some have said to wrap the bleeder threads first with thread seal tape.

Some have posted that works to get the final air out if left overnight. The air goes into the reservoir.
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Ken Bergen
newday777 said:
Speed bleeders have been known for 'tiny bubbles tiny bubbles', oh wrong time for that song! Some have said to wrap the bleeder threads first with thread seal tape.
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That may have been true once upon a time but the current models have thread sealant which prevents the entry of air.
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newday777
Ya mine came with it too, but still get them Tiny Bubbles!
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C
newday777 said:
Did you bench bleed the master cylinders at the banjo bolts to get the main air out of the master cylinders before bleeding at calipers.

Speed bleeders have been known for 'tiny bubbles tiny bubbles', oh wrong time for that song! Some have said to wrap the bleeder threads first with thread seal tape.

Some have posted that works to get the final air out if left overnight. The air goes into the reservoir.
Click to expand...
No, didn't bleed the mastercylinders. So do you loosen off the banjo bolt and pump until fluid comes out?

The speed bleeders come with some kind of sealer on the threads but near the end I took the speed bleeder out, cleaned the threads and wrapped them with teflon tape. Didn't seem to make a difference though.

Brian

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newday777
Yes, just crack open the banjo bolts after you pump it up, hold until you tighten back up, then repeat, just as if it were a bleeder until no air. Catch fluid with a rag and small pan, of course.
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ghostvet
Not sure what speed bleeders are... but maybe you should try this... It is amazingly fast, and inexpensive (USD$25.99)...



http://www.harborfreight.com/brake-bleeder-and-vacuum-pump-kit-92474.html



Just a thought...
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