07 Cali Vintage Brake Fluid Change |
Post Reply |
Author | |
Gugge
Guzzino Joined: 25 May 2014 Location: United Kingdom Status: Offline Points: 9 |
Post Options
Thanks(0)
Posted: 20 Jun 2014 at 16:18 |
Hi, I am just about to change all my brake fluid as part of the 24k service and just seeking advice. I plan to to take the reservoir cover off, fit a hose to the bleed nipple on the caliper and open it, then pump the brake lever until all fluid has drained into the chosen receptacle. Then tighten the nipple, fill the reservoir, then bleed the nipple to eliminate air, then finally tighten the nipple and top up reservoir.
Then do the same with the left/rear brake system, doing the front caliper first, then the rear.
Any advice greatly appreciated. PS. Overuse of the "n" word is purely intentional |
|
Gugge (pronounced Gooogie)
|
|
Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
Post Options
Thanks(0)
|
the only thing different I do is use a syringe to drain the reservoir first.
|
|
V85 TT Trzvel BMW R45
Too old to die young |
|
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Online Points: 17641 |
Post Options
Thanks(0)
|
I never pump the system empty I always add new fluid and keep pumping until I see the lighter coulered new fluid coming out the other end. Saves getting air in the system.
|
|
Brian.
Better 5 minutes late in this world than years early in the next. |
|
Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
Post Options
Thanks(0)
|
OR empty sys and use a syringe to fill FROM the caliper upwards easy to do BUT make very sure the tank ect is well protected fluid squirts a fair way and is ver very corrosive
|
|
The Older i Get, The Better I Was
|
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
Personally I use Brian's method, I also open then close the nipple each time, that is, closing before lever/pedal is released. Clear plastic bleed tube secured in a jar (e.g. through a hole in a screw-top lid) and jar held higher than caliper, if not higher or same height as master reservoir. As said repeat and keep topping up reservoir until clean fluid appears in the tube. Job's a good 'un...
|
|
"Chicken nuggets don't dance on a Tuesday."
|
|
Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
Post Options
Thanks(0)
|
Prefer kens method, less fuss
|
|
V85 TT Trzvel BMW R45
Too old to die young |
|
Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
Post Options
Thanks(0)
|
Not only less fuss BUT no way do you get an air bubble behind the caliper common on older bikes, and it takes less then a minute to do the front brake
|
|
The Older i Get, The Better I Was
|
|
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Online Points: 17641 |
Post Options
Thanks(0)
|
But if you do it my way you never get any air in it.
However the syringe method is far better if filling from empty. On the car I would use a pressure system to blow the old fluid out with new, Ezibleed is one such system. If I could get a spare M/C cap I would do the same on the bike. Such a shame they are always non standard. So easy and mess free.
Edited by Brian UK - 23 Jun 2014 at 08:14 |
|
Brian.
Better 5 minutes late in this world than years early in the next. |
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
Yes if you're just replacing old fluid with new, no way should any bubbles be getting in. E.g. must never let the reservoir 'run dry'. And DO NOT 'empty' the system first! When you buy a bottle of new fluid, let it stand a day or so first in case any bubbles have formed in it due to it being shaken about in transit bringing it home. Edited by Mike H - 23 Jun 2014 at 23:01 |
|
"Chicken nuggets don't dance on a Tuesday."
|
|
Gugge
Guzzino Joined: 25 May 2014 Location: United Kingdom Status: Offline Points: 9 |
Post Options
Thanks(0)
|
Thanks for all the advice; I went for the Brian methodology on the front right caliper and all went to plan. But I started to do the front left/rear brakes and when I took the left side panel off the bike, I was confronted with the "balancing" valve, for want of a better word, which I assume divides the brake pressure between front and rear? But on it was yet another bleed nipple.
The manual makes no mention of this nipple when changing the brake fluid or bleeding the brakes; but do I need to bleed it or just forget about it? The manual also says I should remove the rear caliper and hold it horizontally, but why do that to the rear one and not the front ones? All very cerebrally challenging on this barmy Saturday afternoon. Think I'll lie down for half an hour.
|
|
Gugge (pronounced Gooogie)
|
|
Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
Post Options
Thanks(0)
|
Well if you use the reverse bleed method it is easy peay
|
|
The Older i Get, The Better I Was
|
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
Not sure if my manifold has a nipple ~ I presume not, so I just bleed front & rear calipers alternately. Start with rear I think.
|
|
"Chicken nuggets don't dance on a Tuesday."
|
|
Gianni
Senior Member Joined: 16 May 2014 Location: Muswell Hill Status: Offline Points: 676 |
Post Options
Thanks(0)
|
I suggest that one ALWAYS installs new pads before bleeding the brakes. If the existing ones are still serviceable then swap back after bleeding.
Reasoning is that if you bleed with worn pads and top up the reservoir, when new pads are installed it is possible to lock the system up because the calliper pistons move back and force fluid back into the master cylinder reservoir and can fill it completely - and as we know brake fluid is incompressible. Source - I learnt the hard way with my Quota!
|
|
Le Mans 1, Spada, Cali 1, T3 Mongrel, Le Mans V, Quota x 2, Stelvio TT
|
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
He's right, he's not wrong
|
|
"Chicken nuggets don't dance on a Tuesday."
|
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |