Author Topic: Brake bleeding issue  (Read 2639 times)

Offline HunterTodd

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Brake bleeding issue
« on: June 08, 2014, 01:23:28 PM »
Hi all,

I am currently changing the brake fluid at 36000 kays.  The left front caliper bled easily but the upper right front nipple was corroded and I couldn't get a good vacuum seal on it. So I bled it the old fashioned way by pumping the lever.  probably about 50 times or more.

It bled OK but as I was doing it a couple of drops of brake fluid dropped onto the rubber I have covering the tank.  I checked I hadn't dropped any fluid but I think it came from underneath the master cylinder. 

The lever holds pressure and I am hoping that it is just an accumulation of fluid which got past the seals as I pumped  the lever through its entire range and not a sign of a bigger leak.

Any opinions?




 

Online Brock

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Re: Brake bleeding issue
« Reply #1 on: June 08, 2014, 02:03:33 PM »
It can splash out of the reservoir, it may have been that
Brock
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Offline saaz

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Re: Brake bleeding issue
« Reply #2 on: June 08, 2014, 04:50:18 PM »
Brake fluid can squirt up if you pump too fast. Leaving the rubber seal on can help.

It can splash out of the reservoir, it may have been that
John
(Ridden on and forever in our hearts)
1996 Honda ST1100P
2014 Triumph Trophy SE
Ozstoc, STOC #7239, Farrider #461 Ulysses #061681, IBA #59143 and some others
 

Offline HunterTodd

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Re: Brake bleeding issue
« Reply #3 on: June 08, 2014, 05:25:08 PM »
I had the whole area masked off but some may have got down beside the tape.  I will pull the handle off when I am finished just to check.

But I have discovered a more pressing issue.

I am trying to bleed the proportioning valve and can't get anything out of it. Either by vacuum or by squeezing the front brake. The pressure stays up when I squeeze the brake. I have all but pulled the bleed nipple out.

I watched a you tube video of it and I don't seem to be doing anything different.  Is there trick I have missed?
 

Online alans1100

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Re: Brake bleeding issue
« Reply #4 on: June 08, 2014, 05:46:19 PM »
Check the manual as to how to set the LH calliper up for bleeding brakes

Bleeding procedure steps:
1. Left front caliper. Outer (top) bleeder. Fed from front reservoir.
2. Right front caliper. Outer (top) bleeder. Fed from front reservoir.
3. Proportional control valve. Left front caliper with secondary rear master cylinder must be tipped. Fed from rear reservoir
4. Rear caliper. Center (forward) bleeder. Fed from rear reservoir.
5. Right front caliper. Center (lower) bleeder. Fed from rear reservoir.
6. Left front caliper. Center (lower) bleeder. Fed from rear reservoir. After re-installing from step three above.
7. Rear caliper. Outer (back) bleeder. Fed from rear reservoir

From here  http://www.st-riders.net/index.php?topic=7667.0
« Last Edit: June 08, 2014, 05:54:12 PM by alans1100 »
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Offline saaz

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Re: Brake bleeding issue
« Reply #5 on: June 08, 2014, 05:48:43 PM »
This seems to go through the procedure, just as Alan has now posted

http://www.st-owners.com/forums/showthread.php?68913-ST1300-Brake-Fluid-Replacement
John
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1996 Honda ST1100P
2014 Triumph Trophy SE
Ozstoc, STOC #7239, Farrider #461 Ulysses #061681, IBA #59143 and some others
 

Online alans1100

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Re: Brake bleeding issue
« Reply #6 on: June 08, 2014, 05:56:16 PM »
I have been hesitant in doing this myself but when it's time to do the next pad change (best time to do it) I'll have a look at it then.
1999 :bl11  2004 :13Candy

FarRider #921- BR15, BR17, CR1

 

Offline HunterTodd

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Re: Brake bleeding issue
« Reply #7 on: June 08, 2014, 07:01:22 PM »
i just figured it out

it is fed from the rear reservoir but why wont it vacuum bleed
 

Offline HunterTodd

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Re: Brake bleeding issue
« Reply #8 on: June 09, 2014, 01:38:27 PM »
Bleeding Done.

 Helps when your  read the instructions although to be fair I was going by the manual and there is a vital point they miss.


Vacuum bleeder was not really successful. I couldn't get the tube to seal on the nipple. only bled 2 out of 7 that way. Found bleeding the good old fashioned way with a $10 self bleeder from Super Cheap worked best for me.

Was a bit disconcerted when I got to the last nipple. All the others bled clear blue fluid but the one in the rear bled a container and a half (about 50 to 60 mls) of brownish liquid which I assume to be water.  I ran about five reservoirs full of clear fluid before I finished but I wonder what the state of the inside of the calliper is after pulling that much crap out of it.  Funny the other nipple in the caliper bled clear but I will have to wait and see I guess.

All in all I would say a brake fluid change if you remember the golden rule of not letting the fluid drop  is more tedious than difficult. It would have definitely helped to have an extra person to pump the foot brake when I was working on the left hand side of the bike. I reached over the bike and used a stick to pump the pedal but your arm gets cramped after a while.

Next week I do a coolant change, drop the oil and a clutch master and slave cylinder overhaul. (If the damn parts arrive!!!)

And then after that hopefully I can ride the bloody thing!!!!!!


 

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Re: Brake bleeding issue
« Reply #9 on: June 09, 2014, 02:40:12 PM »

Helps when your  read the instructions although to be fair I was going by the manual and there is a vital point they miss.


I've just gone though the 1100 manual for ABS brake bleeding and there doesn't appear to be a bleed step for the proportional control valve (PCV) and nor do they mention anything about placing the LH front calliper in a specific position. For more information I went to the section that deals with how the ABS/TCS/LBS is set up and how it works and there isn't a bleeder on the PCV.

It seems the 1300A had a slight change to the braking system by adding a bleeder to the PCV so it maybe one less step when I go to do mine at the next pad change.

One thing I did pick up on was to allow 500cc of fluid when doing the secondary master cylinder and the outer pots on the rear calliper. So I better buy another container of brake fluid.
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Offline HunterTodd

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Re: Brake bleeding issue
« Reply #10 on: June 09, 2014, 03:41:23 PM »

Helps when your  read the instructions although to be fair I was going by the manual and there is a vital point they miss.



One thing I did pick up on was to allow 500cc of fluid when doing the secondary master cylinder and the outer pots on the rear calliper. So I better buy another container of brake fluid.

You've got me worried now Alan, I will have to check the bottle but I went through not quite three bottles for the whole process.  I don't think that they would have been 500cc bottles.

The PCV is where I fell over. It is fed from the rear master cylinder.  It fact only the two upper nipples on the front discs are fed from the front. You don't get much out of the PCV  if you pump the front!

Now that I have done it I will be much more confident the next time which is another 18000 kays away I think.

I would be interested to hear if you get any crud out of your system.


 I
 

Offline saaz

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Re: Brake bleeding issue
« Reply #11 on: June 09, 2014, 04:12:16 PM »
Sounds like it is well worth doing properly if all that junk was collected in there. It may save any problems later on, as some of those valves have caused problems in older ST1100s.
John
(Ridden on and forever in our hearts)
1996 Honda ST1100P
2014 Triumph Trophy SE
Ozstoc, STOC #7239, Farrider #461 Ulysses #061681, IBA #59143 and some others