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Old March 23rd, 2016, 11:25 AM   #1
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Bleeding the rear brakes 2013 Strada

Did a quick search and found info on the fronts but not the rear brake. Is this a reasonable diy with a vacuum pump or should I take it in for service. I have no pedal at all on the rear.
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Old March 24th, 2016, 12:08 AM   #2
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DIY, can be a pita, but can be done, best results are with it removed from disc and elevated, turned so bleed nipple at the top. then bleed as normal.
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Old March 24th, 2016, 12:24 AM   #3
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Sounds like a PITA from what I've read. However if you've got zero pedal feel anyway, what have you got to lose? If all else fails it's gonna go to the shop anyway right?
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Old March 24th, 2016, 07:28 AM   #4
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DIY, can be a pita, but can be done, best results are with it removed from disc and elevated, turned so bleed nipple at the top. then bleed as normal.
Removing the caliper is as simple as two bolts, the only difficult part is making sure to keep the small reservoir topped off. Not super difficult for one person, but two people would make this easy as cake.

Use a good quality DOT 4 fluid and you'll not have to do it again for a long time. A DOT 5.1 would also be good, but it's more expensive, harder to find, and usually have to be replaced more often (absorbs moisture quicker).

DIY all the way.
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Old March 24th, 2016, 07:57 PM   #5
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I'm going to give it a try. Anyone use a vacuum pump to pull fluid through the system toward the caliper?
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Old March 25th, 2016, 08:35 AM   #6
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Quote:
Originally Posted by monocog007 View Post
Removing the caliper is as simple as two bolts, the only difficult part is making sure to keep the small reservoir topped off. Not super difficult for one person, but two people would make this easy as cake.

Use a good quality DOT 4 fluid and you'll not have to do it again for a long time. A DOT 5.1 would also be good, but it's more expensive, harder to find, and usually have to be replaced more often (absorbs moisture quicker).

DIY all the way.
Aren't there also a few screws running under the swingarm that hold the brake line in place?
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Old March 25th, 2016, 08:36 AM   #7
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I'm going to give it a try. Anyone use a vacuum pump to pull fluid through the system toward the caliper?
Give it a try just using the pump without removing the caliper - I'd be curious to hear the results.
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Old March 27th, 2016, 11:59 AM   #8
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I bled the rear brake without using a vacuum pump and they've never caused an issue. How I did it:

1. remove rear tire with bike on center stand,

2. remove bolts holding the caliper and the brake line stay on the bottom of the swing arm to free up the caliper,

3. zap strap the caliper as high up on the bike as possible so it's the highest point in the system,

4. install a metal shim to keep the pads separated. a wrench approx same thickness as the rotor works well,

5. install the vacuum pump reservoir to the caliper bleed nipple and secure it so it won't fall off the bike (this just keeps it a clean job),

6. pump the brakes up and crack the bleeder nipple as you would any other brake system.

Once you see the new fluid running clear through the line without bubbles, bolt everything up again.

I've heard of people not having much success using a vacuum pump to suck the fluid through the system.. Might have been technique, might be something in the system preventing this type of bleeding.. I honestly don't know.

Last edited by zibbit u2; March 27th, 2016 at 12:04 PM.
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Old March 28th, 2016, 07:40 AM   #9
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I was curious as to whether using the pump without unbolting everything, would be successful.

I think one problem people have is clearing the abs circuit. If you don't push the calipers all the way open, any bubbles, contamination, in the ABS circuit will remain. Normal bleeding, front or rear, won't clear the circuit.
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Old March 28th, 2016, 09:57 AM   #10
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I flushed the brakes on my Hyper by pushing new fluid in and old fluid out.

Difference between DOT3 < DOT4 < DOT5.1 is it's boiling temperature and from left to right is least to greatest.

Never use DOT5** It is silicone based and can't be mixed with the other glycol based brake fluids.

I attached a small hose to the bleed nipple and bled everything mounted together. I didn't have any air trapped in the system so results may vary. If you have air trapped somewhere in the system, there is no reason you can't remove it with manual methods. You can always help it out by trying to raise the caliper high in the system to try and get the trapped air out.

I wouldn't bother with a manual vacuum pump. The proper vacuum pump uses compressed air and you just open the bleeder and keep topping off the reservoir as the pump pulls all the fluid through.

Here is one that I like:
http://www.amazon.com/Mityvac-6830-B...SEMEH16KM4QNZX

Last edited by Mbalducci1990; March 28th, 2016 at 10:00 AM.
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