The BEST Shimano Brake Bleed Tutorial

preview_player
Показать описание
YouTube is littered with video tutorials on how to bleed Shimano hydraulic mountain bike brakes. However, we wanted to share the real, professional way to properly bleed and flush a Shimano MTB brake that a highly experienced mechanic would perform. This method ensures that all of the bubbles are bled from the system, and also ensures that the dirty, contaminated mineral oil is flushed out and replaced.

In this video, Mike shares some projects around The Lost Co, chats with the shipping crew, and looks to see what bikes the mechanics are working on. Alex then shares how they perform a Shimano brake bleed and flush by doing a gravity bleed to flush out all of the bubbles and old, dirty fluid.

- - - - - - - - - - - - - - - - - - - - - - - - - - - -

The Lost Co // Bellingham, WA

360-306-8827

- - - - - - - - - - - - - - - - - - - - - - - - - - - -

0:00 - Intro
0:44 - Bugging the Shipping Crew
1:53 - Mechanic Check
2:44 - How to Bleed Shimano Brakes
15:56 - BYE! WE LOVE YOU!

#mountainbike #mtb #mtblife
Рекомендации по теме
Комментарии
Автор

Have you ever performed a gravity bleed? Or do you always use a syringe?

TheLostCo
Автор

Last step if you really wan to nerd out: Loosen the brake lever and tilt it 45 degrees or as far as you can with out spilling what's in bleed cup, pump the lever a couple times while lightly tapping body with wrench or something. watch a couple bubbles hiding in the lever release into cup. loosen lever and repeat same process 45 deg in the opposite direction. usually find some tiny bubbles fwd and backwards tilt. Then you all done:) OH and I always top off a drop of oil into bleed hole after removing reservoir to be extra sure you don't accidentally trap a bubble in there when replacing that little o ring bolt. keep rag handy for over flow.

outlastproductions
Автор

Always making sure the free stroke is unscrewed when bleeding, seen this done so many times without and why people say shimanos free stroke is garbage, it not its just not been let out durn a bleeding! Glad to see this one is unscrewed definitely professional 👍

Emtbtoday
Автор

Mike you are way better at making videos than you realize.
This video is gold to me. XTR

Todd
Автор

A tip to prevent air retracting in from the caliper side. Crimp the hose as it's in your waste container and hold that crimp with a soft rubber band. As you push down on the lever, the pressure will bleed out the fluid into the waste bucket and when you release the lever the hose will then collapse into the crimp position and not let any back flow of air travel back toward the caliper. That's also how you do a one-person bleed on a car as well. You could leave the bleed valve open and the pressure of the rubber band will do the work.

jayhavey
Автор

Have been working as mechanic for 15 years. I serviced thousands of shimano brakes and never used gravity bleeding for mtb brakes. One syringe full of oil pushing the fluid from caliper to lever, the brakes always work with no issues.

tomekborucki
Автор

I was actually about to attempt a gravity bleed, because I don't have a syringe. I've donr it this way on my cars many times, and was hopeful it would also work on my bike. Glad to see it does.

ctsingletrack
Автор

Learned a little, always did a gravity bleed . Little tips to get more air out . Thanks great video.

edritchie
Автор

Shimano brakes are the GOAT…for ease of maintenance and reliability. 👌🏽

ZRMTB
Автор

Great Video, Like the haircut. FYI I'm the mail carrier with the Fox 36 fork issue that called the other day.

TRUTHBMXracing
Автор

This is a great method. A good bottle/tube set up the same as in the video is the key to success.

JNineBar
Автор

No joke you are nearly the only ones on Youtube showing how its realy done
It makes me so aggressiv seeing so many mechanics doing it wrong.
Props to you guys

paulblo
Автор

The countermeasure spring isn't for top out, it's a negative chamber helper. Helps overcome the friction that exists before the seals are moving (stick-slip).

okatbikes
Автор

Interesting. I thought I was supposed to keep caliper blocks in the whole process, but it seems this is not the case. I take it you push the calipers out just before you put the wheel back on which would push oil back up into the cup till you do a lever bleed?

CGDreamsTutorials
Автор

Totally get the top-down method for dealing with the dirt, but why not use a syringe to pull it down faster and speed things up a bunch?

HaggisPower
Автор

So I noticed he did not use a bleed block to keep pistons pushed in. Is this because he has the bleed port open so when he grabs lever its not actuating the pistons since the fluid just flows out? Secondly, he is puts the caliper back together and puts wheel back on. So how does he make the lever feel good? I am assuming since he still has the cup on the master cylinder he just keeps squeezing the lever until the pistons engage with the rotor, and the cup allows more fluid to be sucked to give it great feel. Let me know if I got all the right. Great video.

shredntread
Автор

Great tutorial, definitly gonna try the gavity bleed next time my brakes need some love.

Pithlitthedark
Автор

I just did this bleed, worked perfectly. Now we need a SRAM one so I can do my Code RSC's as good.

JJ_MTB_
Автор

As a mechanic I always had best results using a power bleeder pushing fluid from caliper upward and push twice as much needed. It flushes completely and pushes out all debris

rickywoods
Автор

I've done all this, got rid of loads of bubbles spent ages getting the last stragglers out of the lever, felt great with the wheel in and the cup on.
Undid the cup, full to the brim, fitted the screw, spongy again.

cornishcactus