Linked brake bleeding, anyone else have to do this?

mtnpat

Joined
Jun 5, 2009
Messages
60
Location
Virginia
I recently rebuilt all 3 brake calipers on my 96 ST1100 ABS with linked brakes and had a problem getting a proper bleed when just following my Clymer service manual or reading online tech articles. After rebuilding calipers, mounting and reconnecting brake lines, I filled both brake fluid reservoirs and went one by one to each of the 9 bleeder nipples but was only able to suck fluid and air from 8 of them. Using a vacuum bleeder I could not pull anything from the rear bleed screw on the rear caliper, see below:

9739e0b5-be5b-4685-9657-0edfdac3fb1e_zps9f22e9af.jpg


After reading how linked brakes work on the ST, I realized the secondary master cylinder on the front fork needed activating for this particular brake circuit to work (rear caliper, two outer pistons). So I did this to activate the circuit and allow me to pull air and fluid through.

f339fe61-4af4-4e95-80d6-4035fced3f23_zps0fbd31a1.jpg


In the end I was able to get a successful bleed on this circuit and am happy with it, just wondering if others had to do this when working with linked brakes and a system completely purged of fluid?

Thanks

-mtnpat
 
mtnpat said:
I recently rebuilt all 3 brake calipers on my 96 ST1100 ABS with linked brakes and had a problem getting a proper bleed when just following my Clymer service manual or reading online tech articles. After rebuilding calipers, mounting and reconnecting brake lines, I filled both brake fluid reservoirs and went one by one to each of the 9 bleeder nipples but was only able to suck fluid and air from 8 of them. Using a vacuum bleeder I could not pull anything from the rear bleed screw on the rear caliper, see below:


After reading how linked brakes work on the ST, I realized the secondary master cylinder on the front fork needed activating for this particular brake circuit to work (rear caliper, two outer pistons). So I did this to activate the circuit and allow me to pull air and fluid through.


In the end I was able to get a successful bleed on this circuit and am happy with it, just wondering if others had to do this when working with linked brakes and a system completely purged of fluid?

Thanks

-mtnpat
Click to expand...

Thanks for the info. I'm getting ready to do my '01.
 
Finished the brakes the other day. The same thing happened. Couldn't draw new fluid down from that bleeder too. Think I read somewhere that it has to do with the secondary master and not to worry about it. Bleeding the brakes worked just fine.


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Thanks for the post... I haven't had the pleasure of working on a 1100 with linked brakes yet, so I will keep it in mind if and when that day comes.
 
Is there a thread here anywhere with the linked brake bleeding sequence? I had problems bleeding that rear nipple as well.
 
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