How to Bleed Hydraulic Brakes - Shimano® Flat Bar Levers
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- Опубликовано: 9 июл 2024
- This video will go over how to bleed Shimano® hydraulic disc brakes featuring flat bar levers using the Park Tool BKM-1 Brake Bleed Kit.
Questions or comments? Leave them below!
For Shimano® Hydraulic disc brakes with drop bar levers, see: • How to Bleed Hydraulic...
For a text-based version of this procedure, see: www.parktool.com/en-us/blog/r...
See all our disc brake videos in our Disc Brakes Repair Help playlist ▶︎ • Repair Help: Disc Brakes
Video contents:
00:00 Preliminary Info
02:00 Bicycle Prep
04:20 Bleed Kit Prep
04:57 Bleed
06:25 Bleed Kit Prep - Spent Fluid Container
07:04 Bleed
08:52 Burp the Brake
09:37 Reset Bicycle
10:45 Clean Kit
➤ Tools & materials used:
BKM-1 Hydraulic Brake Kt - Mineral - www.parktool.com/product/hydr...
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Хобби
I counted at least 4 steps that no other brake bleed tutorials I've seen on yt have included (doing the 42 degree angle, flicking the brake line, applying brake pressure and doing the quick open/close thing, burping the brake... etc). I definitely prefer this type of tutorial versus the "good enough" kind.
You have me convinced to just goto the bike shop
Loool 😆
I bought a kit and now I regret buying the kit.
Just took my bike into a REI and they got it done for just a little more than what the kit was worth. Yeah, I will never bleed my own brakes again.
This is why i still stick to mechanical cuz its easier
I work on cars and this just seems like too much, imagine tilt the car at a 30 degree angle. Remove the caliper to bleed it. lol
Simple and easy to follow. Takes the mystery and expense out of bike maintenance.
I can do it
I can learn a new skill
I can save money
I can justify buying more tools
Same here, although I’m not sure about having saved money. I spent like $700 worth of tools to save around $50 at my local bike shop.
Admittedly, those tools will continue to save me money, but it will be at least 3 years of DIY servicing until I break even 😅
@@onegrapefruitlover you don't need $700 worth of tools, you need the tools you use for your bike/s
I have around $100 worth of tools they all fit in a box and I can take apart and service everything on my bike, often, on other people's bikes as well.
If you don't have an air fork, you don't need a shock pump, for example.
This is by far the best instructional brake bleed video I have ever seen. Bravo guys!!
I swear this channel has the most thorough instructions, everything else is just down to individual technical skill + experience.
I see skilled senior with humble vocabulary and moustache, I susbscribed instantly😎
That senior is Calvin, he is a Park Tools legend, author, mechanic trainer, total expert.
@@wammo12345
Very awesome 🙂
Senior? Calvin is 27 years old!
Respecto boomero
Hi Luke you have to do it for you in your room I have
The serynge holder is the unsung hero of the bleeding procedure.
Any flashlight holder will do same job
Or zip tie
@@starballs2009 Velcro straps are good for temp situations. Come in handy to keep lever pressed when needed too
@@smallhatshatethetruth7933 yeah velcro is definitely better than a zip tie but both will work fine even for pressing the lever
Toe straps. They’re great for all sorts of things besides strapping your toes.
I want this guy to live in my garage!
Sounds like a kidnapping scenario.
Don't forget to ask to bring the tools as well
I'd sleep with Calvin
@@fergusdonaghy3124 Calvin is a Shaolin Monk and swore an oath of celibacy. Sorry to disappoint.
a lot bullshit in this video. compare only what is indicated in the shimano videos
Lots of people (including myself) miss the point where you put a strap on the lever then open and close the bleed port. This is vital for a firm lever! If you miss this point you'll have a brake with no air but not enough fluid and pressure to give a firm feel.
thank you! I've got no air bubbles left in my system but cant get my brakes to feel firm going to try this.
@@molley17 cool! How do they feel?
Brilliant, thanks for making this process so so clear for a beginner.
Best brake bleed video on youtube. I've watched a bunch and this is clear, crisp, to the point, professional, and with some great detail on stuff that other videos skim over. Thank you!!
Couldn't ask for a more perfect explanation, thanks!
Just followed this process for the rear brake on my Giant Anthem, as it was feeling very spongy, and it worked like a charm! This was very clean compared to other methods I’ve done in the past too!
Yup, me too. Previously, I followed a different video and never got that firm feel. Just did front and back on my Anthem Advanced following this video exactly and my brakes are perfect for once!
OMG. I actually did it and it works great. I couldn't believe it. Best video tutorial ever!
Love the in depth. Done it so many times now but watch this instruction everytime again
Thanks for your excellent videos they’re all so informative.
Yeh this was a awesome explanation and by far the best directional video that is done in a very easy to understand tutorial!
Perfectly demonstrated...thank you
Respect for u sir! U are profesional mechanic😎
As always, a fantastic education.
Very good and helpful vid. Easy to follow once you get going. Just finished doing a full bleed. Old oil was SO dirty.
it's a year since this video dropped, and ya'll just save me a $100 visit to the bike shop. Thank you Calvin & Truman for these amazing video how-to's.
brilliant Kelvin, you are a park tool god m8,
i have been thinking about doing this for a couple of weeks now but my mtb is pretty new & not had much riding done on it, also wondered if bleeding would be the same as a car, either way so glad that this video is out there, thanks kelvin,
Top quality video. Thanks!
Excelente video, muy buen kit de sangrado como todas las herramientas Park Tool. Greetings from Spain
Great video
Nice work,,,with all the tools and gadgets in the world
PRO! I'm bringing all my brakes to Calvin after watching this vid.
Lots of bleeding, Lever etc... 👍🏾🤠 Great jobs fallaz.
Good looking bleed kit Calvin
Bicycle tool companies must have the record for the number of bespoke specialty tools required to do any kind of maintenance.
And they always cost a whole lot more than viable off the shelf alternatives. Bike tool companies make Macgyvers out of us cheap wrenchers. My bottom bracket needs a pin spanner and I'm so close to just trying out a fork with some bent tines.
Y'all are definitely not mechanics 😂
Best tutorial on RUclips
Great video,great mechanic and an awesome’stache!
VERY PROFESSIONAL.
very informative. Thanks. I look forward to bleed my breaks when its a time...
Brilliant!
Nice work
this is so professional
Wow.. this seems like a lot of fun :) I think I’d gladly pay someone to do this for me.
That's why he has 513k subscribers
Great video thank you
Thanks a million
bang on i was struggling to get that last bit of air out of the system with my shimanos and just tilting the bike and the resovior helped a lot, thanks
Can you do just this part first to see if it corrects the issues? Then do a full bleed later if brakes are still unresponsive?
@@danielbromley849 Yes.
Anyone else caught out by "bring the lever away from the grip as far as it will go"? Turns out my lever fully detaches! And it feels very difficult to reattach.
Yet to resolve, but hopefully I can work out what to do soon.
As with everyone else, otherwise immensely grateful for this and all of your videos!
Happened to me; luckily it was only a couple of mins of finagling to get it screwed back in (had to squeeze the brake a bit and screw it at the same time).
Much more in depth than the GCN guide on this subject.
Best tutorial
Hey dude, just saw your clips on de- airing hydraulic brakes. I got a good laugh. Wasting of time and money. I have been doing major brake service for trucks and cars. I just did my brakes for my Cannondale. Just top up from the top and release from the bleeder below. That's it. Less then 3 minutes. The lines are packed and good to go.
Great thanks!
Greetings from Bucharest România 🇧🇪
Please don't be intimidated by there being so many steps in this bleeding process. It's a lot easier than it looks, get those hands dirty.
Gotta be honest bro.... this is intimidating. I just got my first downhiller with hydro brakes and have never serviced hyydros.... 30+ years of mountain riding and I’ve always had rimmy’s for brakes .... wayyyyy more easy to maintain but hydro discs are the sh*t !
Found this one first, felt a bit intimidated due to seemingly many steps. Followed the Mountain bike global network one.. straight to the point and into the action. Very easy.
@@oneangryme I agree that most of the time this is more than needed, but I'm really happy to have the extra steps laid out. I do my wrenching at 140 ft above sea level. My local rides max out at a few hundred feet, and I don't use the brakes for more than a few minutes at a time, but sometimes ride at 8- 10,000 ft. Brakes that work fine in the desert sometimes get quite dodgy when I get to Telluride, Durango or Big Bear without the extra attention to detail.
It is true that not all these steps are needed all the time, but they assure a better bleed - especially if you are having trouble with the Shimano wandering bite point problem.
I mean, it’s basically a fairly simple process - first push clean oil from bottom to top, then push clean oil through again from top to bottom while removing all the air.
Calvin is the Jeff Cavalier of bike mechanics.
Thank you
Very clever 😇
He's the best
When the caliper work is done, do you put back the brake pads and the front wheel right away or after finalizing the lever work?
Best video
Thanks for Bucharest România 😇
Il profesore 👍
brahhhp! thank you!
Brilliant! Thanks!
A clear cup! Simple yet genius! 😂
Great video. I have been wondering why not to use syringe attached to the caliper to create little vacuum in the system and get oil from funnel at the lever to the caliper instead of just pushing the lever and opening bleed nipple?
Because you already have the lever on that side as a pump. And because syringes don’t pull a vacuum very well and if they did it would cause bubbles, rather than bleeding them out.
Asome video
Great video
I just scored the BKM bleed kit
Thanks
What an amazing video, n here's me thinking I know how to bleed brakes adequately! Fantastic covered everything, so easy to follow
Probably the longest, most pain in the ass bleed procedure ever...
Love all the Park Tool Videos! Greetings from Germany where we love precise engineering-Instructions!
I do have one question:
I have Shimano SLX M7100 brakes. After the whole process, my front brake lever is responding super directly/sharp as I prefer it to do so.
My lever for the rear brake is responding slightly softer.
I read a few times that this is very often the case, that rear brake lever is always a bit softer when braking.
Is that true? Or is it more likely that there is somewhere still some air bubbles hidden.
The only "mistake" that i can come up with is, that my bledding nipple was facing to the ground when I did the part with quickly opening and closing the bleed nipple while a strap is pulling the lever. But the syringe was facing upward just like in the video.
Might this have been a factor, why the rear lever reacts minimal softer/less sharp After the whole process?
Thanks in advance!
Minor thing but I'd resist putting the lever bled port in the same pot as the pads. Lessen the chances of contamination.
Although a very thorough educational video, this is a tedious process and for someone like me who would be doing this once a year, the probability of meeting an accident is quite high. Therefore, I'd let the mechanic at the bike dealership do it for me who probably bleeds ten brakes in a day and, hence, has good muscle memory for the job. But I will be watching him do it and make him follow the procedures in this video.
@@ghilbid I highly doubt he would do that like in this video... He will likely just push the fluid from the bottom and that's it.
I came here to say this
After doing the bleed I like to put a little positive pressure in the system with the syringe. I can adjust the travel of the lever before engagement this way. The Shimano adjustment at the lever doesn't do squat and I hate a lot of travel before the brakes engage and having to keep the levers so far from the bar.
Kit paid for itself after two bikes. I'll be doing this every spring. Got the process down to 15 min.
My favorite feature of the kit is the stop plunger. Though make sure to pull it out before pushing fluid up from the caliper, launched the plug across the garage lol
Good video, very helpful. Got quite lot messier at my first try today 😂
But it worked well.
What i dont get,m why bleeding twice??
Very good instructions! Thanks for the service and comprehensive video!
Certain lever set screws / bite point adjustment screws, when set to their maximum extent, close the hydraulic system. Find the max point as described at 2:04, then reverse a turn or two to be safe. Your shop floor will thank you.
Omg you hero! I only wish I had seen this comment earlier. Could have saved me much frustration and mess! I couldn't understand what I was doing wrong having never bled brakes before. This solved my issue completely :)
Me too! My god I was wondering why nothing would drain out the caliper, it took hours and mineral oil everywhere until I worked out it!
Great tutorial, thank you! Question: Why is the funnel adapter purple and not Park Tool Blue?
I think it is because there is multiple funnel adapters as it is a universal bleed kit so they are colour coded
Very thorough but I'll have to watch a couple of times. A lot of sequences. I do not have disc brakes thankfully.
I thought I had it rough with my road bike calipers. My condolences.
Are we supposed to do the bottom to top bleed (step 4) and the top to bottom bleed (step 6), or are those intended for 2 different systems? In other videos I see people doing one type of bleed or the other, then going to the brake burping step. This video seems to suggest that we need to do both... is that correct?
On 1:46 the brake is installed INCORRECTLY! There's a 160mm rotor but a +20mm adaptor for a 180mm rotor. The pads won't touch the rotor braking surface sufficiently if ridden like that!!
What is wrong then?
@@xGodfreyy The adapter should be left off. Or alternatively a 180mm rotor should be installed.
Don't diss Calvin
After the bleed was done he left it out when he reinstalled the caliper
I think they did that for demonstration purposes
I bleeded my brakes yesterday before watching this, most videos just speak about pushing oil from bottom to top only, which will end up you having spongy and weak brakes, the steps of pushing again from top to bottom, pressing and quickly opening/closing couple of times, adjusting 30 degrees other side to get all bubbles, etc, today's evening I will try to fix my brakes again, wish me luck :D
Note: I am also suffering from a case where 1 piston is extending more than the other one, not sure why, I cleaned and lubed them but still there 1 piston that is popping out more than another one
To really fix it then remove the pistons check how they look and maybe replace the sealing rings
Hi all, i have LT-Woo system and my rear caller is faulty, i would like a recomendation on what shimano system can i place, need rear hydraulic brake set plug and play for less than R1000. Thanks
So I applied the break to check the pistons moving after removing the bleeding block, before putting back the pads. It doesn't seem to have caused any problems - I pushed the pistons back with a scissor. Do you think I need to bleed again or nothing to worry about?
Nothing to worry about, but don't use a scissors to push back the pistons - especially if you have ceramic ones.
So I just picked up a bleed kit at my local shop, but It didnt come with a syringe or tube thingy. Could I (in theory) just put the funnel with the mineral oil into the levers and squeeze them?
You will never get all the air out, especially for the rear brake, where the hose is longer. But truth be told, the brakes will probably still work acceptable, if you manage to make the lever feel firm when you squeeze. Just take care on the first ride, start slow until you're sure you can rely on the brakes.
I've got a question. Watched quite a few vids on this and nobody mentioned bringing the lever outwards. What is the reason for this ? Trapped air ?
I'm squeezing the syringe but the liquid is not flowing. Are you sure the bleed screw needs to be turned only 1 half turn?
Thank you, this video has been extremely helpful in convincing me not to get hydraulic brakes.
Buen video una consulta es lo mismo para slx??
Thanks! The process is the same for SLX.
Me after watching this DIY video: Yes hello. When’s your next available appointment?
What about the free stroke screw?
Wow, this is so much more work than my mechanical disks :(. Buying a new bike so going to have to put up with this I guess.
The mineral oil can be left in the system relatively long, it don't get contaminated with water like Dot 4 in cars.
Or just buy a sram brake and save yourself like half the steps. I now have shimano and i just realized ill just let the mechanic bleed the shimanos.
@@florianohl4035 too late lol
I don't get it... First you fill up the brake line from the caliper up to lever with clean fluid. After that you let the fresh fluid run from lever to caliper into a disposal bag? Why do you do it 2 ways?
Haha thought the same thing. I was like what did i just watch?
Michiel Nooren: because It’s often a bear to get all the air out. It’s an indictment of the design of bicycle brakes.
I only do it caliper to lever. So far so good.
Yeah me aswel.! find it much easier and get better results.! Its nice to flush a couple of seringes of fresh fluid through anyway and seems to get most of the air out doing that..then do the rest from the lever
Maybe you get the bubbles out that you accidentally injected with the syringe? But it does seem like a a double check.
Why do you start with the "reverse" bleed from the caliper to the master cylinder?
That was a rocket science
Shimano also has a good manual for this procedure, the video looks more complicated (since it covers different brake types) than it actually is.
Hydraulic brakes using mineral oil (no Dot4) don't need bleeding really often, Dot 4 mixes with water (from humidity) over time but mineral oil mixes only marginally with water and can be left in the brake for years. Since it's normally a closed system you typically don't get air in as long as you don't disconnect brake hoses.
Especially simpler models like the MT200 are also simple to bleed, they adjust the play of the pads by themself and if the pads are worn you just have to push the piston back (for example with a screw driver between the worn pads) and put new pads in.
Do you think you can use normal mineral oil that you can get at the store?
How are you supposed to do the last step with a caliper that has a bleed port but no bleed nipple 7:54? Since it takes a threaded fitting and doesn't have the ability to open and close quickly, there's no way to pressurize the hose?
Not sure why but you complicated the process
You are unsure? Did you happen to go to the manufacturer's website and read there version of the process? It is exactly as described here. Step 5 on and everything. He's not complicating it, he's following the manufacturer's directions. We could get away with it without doing a gravity bleed, but when you're a major company like Park tool putting a video up about how to, it's best not to contradict the manufacturer.
Do a video for Magura brakes!
Coming soon!
May I ask what is the point of the last step: Holding the brake lever with a cable tie and rapidly opening and closing the bleed nipple?
Why is it this is only needed for the Shimano and not tektro?
I've done it this way for my bike (Shimano) but was going to do it for my friends bike which has tektro. Just figure not learning a new process?
This right there is why you should take the bike to a local bike shop.
Yes, sir.
This is just a bike, no a car with ABS systems (even there the brake fluid can be changed at home)
Honestly while this is a great video, it's over complicated. I could see doing this if you can't get the normal version to work. Lookup the shorter shimano bleed videos, one of Santa Cruz's race mechanics has a famous one. It's way easier than this and almost always works. But for a total technical process, park went through literally everything.
wow what a PIA!
What if using the syringe intead of the plastic bag to make the oil flow up and down until no more bubbles exit the system?
That is usually done mostly.
Because you need to release the pressure inside the circuit and you do it when you open it to the atmosphere, you can only do that with an open system like the plastic bag, if you use the syringe the circuit continues closed and the oil will not go out
@@mariomata9663 Why is it necessary to use a 2nd syringe for a SRAM brake system?
(see park tools other video)
ruclips.net/video/bOUbUtaYaOE/видео.html
Is it due to the brake fluid?
Mario Mata He can do this if the plunger is removed from the syringe.
I tried to bleed my brakes but when I try to inject the caliper with my syringe I can't. Somethings blocking it and I have no idea.