Shimano Nexus 8 Speed Hub Reassembly - Putting It Back Together...
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- I was challenged by my viewers to try to re-assemble the Shimano Nexus 8 Speed Hub that I disassembled in my last video. The hub is a Shimano Nexus SG-8R20. Fortunately, I had my video of taking the hub apart, which helped me in figuring out how to put it back together again.
Shimano Nexus 8 Speed Hub - Dissection! Evisceration! Destruction!:
• Shimano Nexus 8 Speed ...
Here is the Shimano service manual:
si.shimano.com...
For assembling the shift spring assembly, this video by Dan Burkhart was greatly helpful:
Shimano Alfine shift spring overhaul
• Shimano Alfine shift s...
* editing goof at 16:55 to 18:34 with one clip, and then a reshot version of the same clip. I redid it because I thought I could show it better. A little peek behind the curtain of shooting one of these videos.
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9:05 - the spring does not sit correctly. It must be completely symmetrical, no skew allowed.
Here is an old old video on Inter 8:
th-cam.com/video/H7JqCCkhSUU/w-d-xo.html
Next time... Google.com-> Shimano Nexus (model name) service manual and you everything from A up to Z including which one grease and where...
You only do that if the parts are free and your time is worth nothing. No warranty for this job.
Hey RJ. I had a shifting problem with my Nexus 8, so I found this vid while I was looking for a possible solution. Thanks for such this detailed video, I learned a lot!
Such a detailed and comprehensive comment yet no more than a 'heart' comment reply. People way too busy nowadays if you ain't bringing value to them.
Yes is roller clutch like one on fly reels or fishing reels. If you reverse the clutch you transfer the fly reel from right hand to left hand.
the diagram si.shimano.com/pdfs/ev/EV-SG-8R20-2236G.pdf
@@bozhidarvorukov7348 This pdf is really useful!
Roller or sprag clutch. Too much grease shouldn't be a problem. The accumulated rust on the bearing retainer and perhaps other places might be the culprit.
Great to hear, I have always thought of getting one of these.
You have the patience of a saint!
Re assembly is even more impressive lol, goog job !
Next stop, brain surgery!🤯 😂
Enjoyed the video thx 👍
13:42 in the video on the drive side after you put the cone on you put the washer thing with lugs which should locate on the things sticking up well mine isn’t sticking up so can’t locate and which way round is the washer indent down or facing up plz help lol
i bought the alfine 8 speed from ebay and its missing every part on the outside. I hope to god it works
Conclusion drawn from this video:
To repair this hub, follow the steps below:
1) Remove hub shell (see TH-cam video above.) Stop.
2) Soak hub in degreaser for 24 hours.
3) Flush with water. Drain. Blow out any remaining water with compressed air.
4) Soak hub in naval jelly for 24 hours.
5) Flush with water. Drain. Blow out any remaining water with compressed air.
6) Place in oven at 150 degrees for one hour. Let cool.
7) Soak hub in Shimano hub oil, per instructions. Let drain.
8) Grease cup & cone bearings where possible.
9) Reassemble hub shell & associated parts. Adjust & lock down.
Voila, no disassembly required!
I was sat thinking exactly the same as I was watching this :-D
Its crzy there is a dislike in this video!!come on this is amazing...
I was going to do this but when you come back. There is something wrong i was like should i 🧐 but dude thanks alot SUB!,! I have no problem what so ever but when i put gear 5 backword pedaling making noise its kinde something happening or touching. . Only happends after 4 to 8 gear. Is this normal just got the bike recently second hand.
Thank you
Sorry, no idea. Maybe a lube would help.
Hello, i have 7 gear Nexus and it is not working. When i step on a pedal something goes loose and gear doesnt make wheel move. It works only when i push it with slight force. I found out that plastic mechanism wasnt locked and it didnt want to lock, found out that between this and gear there is a metal ring which shouldnt be there. I removed it and it locked but still doesnt work properly. I did not see any ring like mine in your video and got no idea where it schould be.
Sorry, but what is in the video, is all I know. I haven't messed with these things much.
@@RJTheBikeGuy I repaired it, the issue was the gear, 3 internal teeths got used and the gear was rotating without giving further movement, additional ring couldnt be placed cause gear moved out not making space for it to fit in place. Thanks for answear anyway, looks like you care about audience :)
Thank you so much for the teaching, but you really should wear gloves when playing around with these kinds of oils and lubricants.
As a Merchant Marine Engineer for more than two decades I’ve overhauled all manner of complex machinery (motors, pumps, purifiers, valves...) but this really challenges your attention to precise assembly. I watched you take this apart, and I was reminded of the old engineering saying that “assembly is never the reverse of disassembly”. Anyone can take stuff apart. Putting it back together is always the challenge.
Bravo RJ, I could have used you on the ship.
Now you're an authorized Shimano IGH mechanic. LOL! Nice job RJ!
actually no, he didnt fix it.
I find it amazing how they design these things! So complicated
Indeed, they take epicicloidal gearsets found in automatic transmissions to a bike, i freaked out the first time i saw this.
Gears...thats for autistic avants to design I think. Have you ever seen how they design the gears for watches...with those special challenges..what do they call it again... Anyways...with simulation software it is much more easier to design very complicated small mechanics...
Yes indeed. Crazy skilled Japanese people just going hard on quality engineering and design.
Yeah complicated as fuck.... Without knowing assembly procedure there's no chance to get it working back after disassembly.
yet so cheap
and they said nobody could put Humpty Dumpty back together again! Well done!
Great video,thanks a lot!
A note:
When you installing the ring gear at 21:07 you must have been timing the planetary gears.Each of the three cog there is a little sign on it.The three sign must be standing in the same position during the ring gear installing.
This video show it at 7:20
th-cam.com/video/zyE5AUhWHOI/w-d-xo.html
maximum respect
I wanted to say the same xD. Otherwise the mechanism will get destroyed after couple of spins of crank :/.
Shimano makes a tool to hold the gears in proper timing. Well worth it if you’re doing more than one or two. Also the drifts to set the collar and seals are worth it. I’ve used shimano white igh grease but next time I’m trying some automotive transmission fluid
Also, use regular axle grease on the wheel bearings
My kinda guy! The service manuals for SG-8R20 are available through Sheldon Brown's page, but I'm guessing you already knew that. The axle group (with pawls) appears to be a lowest replaceable assembly.
I enjoy repairing stuff on my bikes because they are always very simple mechanical things.
This thing however is just unbelievably complicated. Thanks for showing how to take it apart and back together. Even if it still won't work properly, you are my personal hero!
it just needs one more spring and clip to be a nuclear bomb... dear lord... After this, I can rebuild the manual gearbox of my car in a heartbeat...
You're giving up way too quickly! You can do it!
Is there any literature explaining how that mechanism is supposed to work? If so, you should be able to troubleshoot it. As complicated as they look (and they are), they are fairly straight forward.
Perhaps there are indentations that allow the pals to fall and are have dirty grease in them which is preventing the palls from dropping all the way?
In any event, I really hope you return to this hub.
help him and find the doc, you have an internet connection.
The corrosion on the body holding the pawls indicates to me that there's corrosion within that body as well. Plus a bunch of old grease and grime. And the sprag clutch bearing retainer was a mess. Those steel parts need more than just degreasing. Wire brush to remove corrosion would be a must in my opinion.
That was the most suspenseful video/movie I have ever watched! Will RJ succeed? Will be not? You did it!!! Take a huge bow RJ! That was so interesting. Can't wait for the sequel where you do battle with those stubborn prawls!
If anyone can do it RJ definitely can. RJ you're the man love the videos keep them coming
..Man..that was impressive!......awesome work R.J..
RJ you are the best as always👍
the complexity of this hub is a-pawling and your stick-to-it-tive-ness to be applauded. keep at it. get those pawls aworking and astonish us
Thanks for the great video. THE PAWLS ARE WORKING FINE! They don't get pulled down! They just get overridden by the shell because it moves faster in higher gears so the lower gear pawls just slide underneath while the correct pawl grips. I think if you tried this hub it would work fine!
16:55 start clip 1
17:50 end clip 1
17:50start clip 2 (is the same clip)
18:34 end clip 2
Hehe Editing goof! I saw the first clip had the unit out of frame, so I reshot it, and apparently forgot to remove the first clip. A peek behind the curtain.
Thank you for the detailed video. I was able to fix mine after many attempts. The second spring insert is the trickiest part, and it is what was wrong with mine. The spring has to be inside the upper flange tabs, and outside the lower flange tabs after you tighten it one turn, but it does not want to do that! Several times I thought I had it, but I couldn't get both sets of four gears to work. Upon inspection, I could see the spring was crunched up in the space, but not properly, so the mechanism that gave you the second set of gears was not moving properly. Finally, I had to ask my wife to help, and with four hands available, we got it in correctly, and now it works. Thank you!
6 months ago, I tried to service the same hub. Guess what, I've had the same issue and I gave up after a while. Anyway, cheers for your effort of putting everything back together!
If you did not impale one of your fingers with a spring during reassembly, it was not reassembled correctly!
I am living on German- Netherlands border, and I am a big fun of Dutch bikes (Gazelle, Batavus, Sparta). And, first, I liked Shimano system, everything is hidden inside. But now, I have 3 bikes in my garage with broken Shimano systems. Not everybody knows how to adjust/regulate them regularly, but then it is too late. BikesShops either do not repair such systems or it costs too much (about 55 Euro/hour + taxes). You also cant fix it by yourself even if you are a technical guy. You do not have proper keys to open (they cost 20-30 Euro for a key), standard keys do not work, everything is incompatible! Then you need special expensive oils. So, my conclusion, such Shimano system serves you 3-5 years, and then you should utilize the whole bike because it makes no sense to repair it. So, only a small part - Shimano hub is broken and you need to throw away the whole bike, which still has excellent condition. Stupid.
Therefore, I do not recommend such Shimano systems. Buy bikes, like they sell in Germany, where all gears are outside.
You can buy new hub or new wheel with hub.
That was coooooooool
These hubs are really cool and a wonderful piece of engineering, it looks like NASA stuff.
Thanks man, you Rocks
I am wondering how do Shimano workers assemble this in factory.
Probably assembly-line method. Each worker only installs one or two parts, then sends it along to the next worker.
I always wondered this myself. What a job if it is manually assembled. I imagined it to robots.
roses are red
violets are blue
dont say first
think of something new
Not a suprise it costs a small fortune to get one of these fixed at a store. Nice job getting this back together! I know it's not easy, I've done one with 7 gears and it's a real PITA.
To me it looks like either the tabs on the turning thing that push down the pawls, or the parts of the pawls that get pushed down are worn out, which causes them to stay up too much. I guess the grime and sand that was in there before might've done that damage.
Amazing job on reassembly and explaining all the workings of the hub at the end!
Great deal of knowledge... patience and integrity..RJ you are a very smart man.
Man, as a cyclist and bike mechanic I absolutely love ur vids. I very very rarely enjoy any TH-cam video longer than 20 mins, but you 40min+ vida makes me thrive
I really enjoyed watching. Two years ago I fucked up a very dirty shimano 3 speed hub from my sons bike. I thought, well I can do this! I Watched reassembling videos but at the end it diden't work. Finally I bought a 2nd hand inner work for less and finished the job. Could not sleep for 2 nights, felt very disappointed in my skills. Your video reminds me about that my struggeling moments with the shimano hub. BUT, I really got BIG respect for the engineers who invented these hubs with so much parts, all designed with a purpose and all work together. Me myself, I am am audio/video composer but when I got a BMW R60/5 (1971)from my dad 15 years ago, I started to appriciate the wonderfull world of mechanical enginering. Great Video !!!
Imagine servicing these allday. Haha. Would drive you mad.
Thanks for another great video. I obtained a Nexus hub for just about free but was it frozen and rusted. I took a little apart, and got it shifting, but the pawls would not engage. More disassembly and eventually all working good. Your video was the best on TH-cam with careful and clear explanation of the assembly. This was probably the most complicated assembly I have ever performed and would of never got it completed without your detailed video. Thanks, RJ!
Why does everyone say this thing is too complicated? You are putting an 8 gear transmission in a rear bicycle hub. Thats not easy. Size is very limited and you want it reliable and ideally not to inefficient. The Rohloff Speedhub is a planetary bicycle transmission as well (although with 14 gears) and it is the most efficient internal bicycle hub in the world. Looks quite similar to this one.
Shifter sleeve was the part operating the paws. There is something wrong, Maybe cleaning helps. You found out how to do it, assembling the nexus hub, Congratulations :) !
Really appreciated this vid for my Nexus 8 service. More parts than I thought which would have been impossible to put back together without this video.
I am amazed at your determination. You have inspired me to take apart one of these Nexus 8 myself! the model I have to try with is one generation newer than the one you have I believe? It is an 8 speed but some of the ring clips seem a bit different. Either way I have had shifting issues such as slipping gears regardless of cable adjustment. Numerous Nexus 8 have had gear 5 fail and I wonder if it has to do with the clutch engagement you showed. Thank you so much RJ. You are my favorite TH-cam bike mechanic
Excellent and informative. Glad you rose to the challenge! Could it be that the pawls are not meant to be greased? Oiled only?. Just a thought that the grease may be taking too much room in the system and gumming things up.🤔
I don't think that is the problem.
Definitely still useful and all the more interesting because you didn’t contrive a happy ending for us. Real life. In a garage.
Well done Dr. Science, I mean RJ. I have a had a couple of these hubs apart, same situation, "something" not functioning properly.
Very informative video, thank you for sharing it.
Be well,
Stephen
27:00 Nothing is wrong with the shifter pawls. They're not supposed to pop down immediately as you go from say 2nd to 3rd. What the pawls do is prevent the sun gear in each ratio from rotating backwards, which it needs to do in a lower gear (eg when in 2nd, 3rd gear's sun is spinning backwards). In the higher gear (3rd) you lock the sun of 3rd, and the sun of 2nd will rotate forward. This will just cause it to click over the pawl, hence the pawl for 2nd can remain up. This also improves downshifting as it doesn't have to raise the new gear's pawl, only lower the last gear's. OK, that's a really bad explanation, so in summary, it's supposed to work like that.
Did you adjust the shift cable tension properly? (line up the yellow indicators in the window in 4th gear)
What an amazing piece of machinery! Thanks RJ!
That's why I keep coming back to watch your videos! great job!
can't believe they invented something like that
RJ. I have posted 2 videos "Nexus 8 Response to RJ" which show the shift patterns for my 2 stripped hubs. They appear to show the same behaviour as your reassembled hub.
I know 5 years has passed, but it looks like your shifting problem is due to: The notches on the pawl control collar (28:50 to 29:00) are too long (more degrees of rotation on the collar). If they were shorter, they would push the pawl back down after its time to rise has passed. This may be due to wear from no lubrication, or somebody filing them longer? I have an Alfine 8-speed (SG-S501) and its notches are half that long! Your pawl springs look ok because we can see them raise each pawl when its turn comes. Let me know if you would like me to send some photos of my hub (disassembled). Great videos, thanks!
The second that he opened the casing and I saw the brown grease I knew that rust had formed from water ingress. This hub gear is an incredible feat of design and engineering, but it is obviously a nightmare to service. Because of the size restraints the tolerances are small so once it corrodes as indicated by the grease colour there's a very high probability that it's game over. Shimano states that this hub must be serviced every two years, which should mean a full disassembly, comprehensive cleaning with ultrasonic, regreasing and the oil bath and reassembly - quite frankly that is economically unviable. It is manufactured to sell and then fail after 5 or 6 years. Compare that with an old Sturmey Archer 3 speed which will probably last for at least two centuries of use. This is a very poor product for the consumer and a good product for Shimano's profits. It's extraordinarily impressive and sadly embodies what has gone wrong with our society.
I wouldn't touch one of these with a barge pole.
All the best everyone. 👍
7 speed looks similar, but note that the cog wheel looking plate at 13:30 has an outside and inside and the shift arm will not fit if this plate is turned wrong.
That was the case for the 7 gear hub.
Thank you for the video! You saved a life today... The life of my wife's bicycle :)
At 17:30 I believe the part you call a "ring bearing" is actually a roller clutch (a silent freewheel implemented by those rollers riding up ramps). It is not a bearing, rather a one-way clutch, or freewheel. Great video, thanks.
Большое Вам спасибо. За интересное ! Нужное !И очень понятное !Видео пояснение сборки Shimano Nexus 8 Speed
There's 115 parts in a Rolex Submariner watch movement. I'm thinking this dingus is getting close to that number. I don't know if it's fair to count individual ball bearings though. But they are technically moving parts. And if one bearing cracks....
you where so close, I stumbled on this and got hooked. Never knew these existed, now I can see how they work. Pretty awesome device. Thank you.
8:50 - Is this a full turn or only 3/4 of a turn? I had a really hard time to figure out, just how this spring has to be seated correctly. There was always some windings sticking out?!
Had to give up on this hub.
"I'm not done with it now"; that's not what you want to hear after an instruction video. Sounds like "try it yourself:...🤔
Im amazed at all the people praising you like you have accomplished over-unity! You are knowledgable, tenacios and patient but you didnt invent the damn thing! Sheesh people! The wonder here is in the precision and metalurgy of this incredible mechanism which owes its origins to the great thinkers of our past...watchmakers, mathematicians, blacksmiths and those that made weapons of war. All we have to do as careful mechanics is pay attention to how it comes apart then work backwards and have the right tools and dexterity. Man people just love to pat themselves on the back.
17.02. i need to replace that ring, found a broken piece of it when i diambled the gear my gear jumps over in 4 and 8 and make a noisy metallic sound
R.J. I do not thing the pawls staying up is a problem, because you are shifting up the gears, so the hub shell speed relative to the axle is increasing per revolution of the input. As long as the pawls are free to "ratchet" the motion of the shell will not cause any issues. It will just push them down out of the way. I have just rebuilt an SG C 6000 8R and it displays the same behaviour but works fine. Cheers.
I don't think they ratchet like that. I think one pawl at a time is supposed to be up and hold one of the three gears inside, basically making it a sungear: th-cam.com/video/k8qAn2D05R8/w-d-xo.html. And the other two gears will turn freely.
@@RJTheBikeGuy The position of the pawls (up/down) is governed by the internal ramps cut into the fingers of the shifter barrel. This is all one part and therefore the relative positions of the pawls is set by the barrel. Unless the barrel is twisted or distorted, it is tricky to see how the relative up/down positions of the pawls can be affected. Given the tiny clearances available within the mechanism, I doubt a distorted barrel would turn at all. I wonder if the pawls are further pulled up as they catch? The slight downward movement of the "used" pawl may give it sufficient clearance to be fully disengaged even if it is not fully retracted. I love these hubs and your videos. They are a delight to ride. The sgc 6000 I mentioned before was junked because it was slipping. That was free and just had gummed up roller clutches fron the incorrect grease. I run ATF in mine and avoid laying the bike over. Works a treat. Cheers. Keep up the good work.
You are right. The pawls are working fine. I hope RJ tries the hub because it will probably work. RJ fixed it! (I am NOT being sarcastic). RJ, I would love to hear from you! Roger Duncan.
Good video,thanks RJ. Just a swag, but I'd guess that the spindle that controls the gear pawls was over rotated and is 1/8 to 1/4 turn out of position. Probably trying to get to 9th gear
Nah. If you look at 27:04, when it's in 1st gear, it's at the very beginning of possible rotation. It can't go back any farther.
تحياتي.براغواليك.بوط.
فيتاس.بيكلة.خطير.
بيسراحة.خاص.فوق
الباك.هد.الحركات.القوية
In the first video you didn't have a clue what you were looking at, now you have all the tools and can do the majority of maintenance on those, as well as a decent amount of troubleshooting. Very impressive and inspiring to watch.
Thanks again!
Hey how did you manage to get the carrier unit back together? Just asking
Kudos to whomever designed this thing, but rebuilding one deserves a beer
How do you dip the hub with the spokes? You mean you have to remove all the spokes from the wheel before doing this? and rebuild the wheel again? how is this realistic?
You are better off buying a new one. New ones are improved. Same with electric cars, every 2 year new motor and improved batteries.
Mechanic work is a lot like trail riding. You make it all the way over the mountain and then get thrown by one little bump.
looking forward to when you do get it figured out!
This thing is a little bit tricky x n = This thing is very freaking complex LOL
Hi from Romania.
What grease use you ?
I use Total with calciu and litiu.
Do you think thumb shifter will work as a replacement for the revo shifter?
How did the inside of the hub get so dirty? Is there no attempt at sealing?
Can you imagine the kind of brain you need to design these mechanisms.. 😵💫
Супер, але ще б українською або російською...
What could be the problem: no tension at all in the cable barrel cj-8s40?
Good video. I learned to rebuild these from the Russian video but it’s nice to see another viewpoint
I guess u got have certain kind bike frame
Axle stananary
It is said these internal gears hubs should last a lifetime! So why need to open and repair?
I do not try to do teardown my 7 speed hub, it would not ever be whole again after that.
work Like Automobile 9 Speed planitory gear box
As always it's the cost of a rebuild versus a brand new unit....
Jesus Christ! Who designs these things? They can't be humans!!
@ 0:55 - You can use a dish washer to clean that stuff, power dry.
Step 1: Buy a single speed. Step 2. Get in shape.
I just discovered during my Shimano Alfine 8 sp. install today, after spending more time than I am willing to admit to get the shift assembly onto the hub, I was trying to put a square peg into a round hole! No matter how many videos I watched today, including this one, turns out I have the needed parts for a Nexus, NOT a Alfine, and the two are similar enough to not be noticeable (until you know what to look for) in watching a video, or many videos! I ordered my Alfine hub off Amazon , and right below they had a "needed small parts kit," but that kit is not for the Alfine. Just a heads up....
pls explain shimano nexus sg5r30 reassemly thank you
Amazing understanding for machinery,mechanism and gadget!
There’s no mentor about bicycle mechanism like you in Japan , though SHIMANO is made in our nation Japan😭
Thank you so much indeed. May god bless your hand and soul.
Domo Arigatou❗️
Great video RJ. I was a bike mechanic when I was younger. When one of these things showed up at the shop it really separated the guys that thought they knew (me) from the very very few that did. Your video was a great aid to me while servicing a nexus 8 with lots of drag. Thank you for putting this together.
My god,That circle spring installed:)
N8 was revived
And my soul too
Perfect video RJ, the other Shimano ones are almost all Russian.
I now have a Nexus 7i with a nice trigger shifter. Perfect gears for medium hills, city and highway. It came with 44/22T, too slow for me. Now going to try 18T. The stupid roller brake makes it way slower than my finicky shift SA XL-RD5w. This 5w IS the fastest hub I've ever had, done 46 mph on a 8% hill.
But I want to tell everyone to not be so afraid of a little play in ANY bearings. The 7i came tight and so did every pedal I ever bought. The 7i coasts way farther now, it was worse than my Rohloff ever was. LOL.
.....NEVER GIVE UP!!
I have a odd question about the grease your using on everything. I was told not to use grease on internal bike hubs and to use oil. I guess the grease tends to fail quicker and cause the hub to start locking up and acting strange ect ect.
Shimano make some great products but in my opinion the nexus hub is not one of them. I buy and sell 2nd hand bikes and practically every nexus equipped bike I have owned has had mechanical issues . They just simply do not seem to be robustly constructed
I was given a bike last year that started out needing a shift cable. It's a strange shaft drive set up, and I've never even seen such a thing so I was more than happy to take it off someones hands. Before I was able to get a cable, it was stolen and long story short I did find someone riding it a week later on a flat tire nonetheless but at least I got it back. Unfortunately some idiot decided to "fix" it enough to ride, though never even replaced the shift cable, and in the process lost a few parts. I took it to a bike shop hoping they could figure something out and it's been a year with no luck. I picked it back up today and see that though the shaft drive is strange, the rear hub is just a shimano nexus 7 with a ring and pinion type design instead of a sprocket or pulley for a belt. I wish I had taken the time to look myself because all I'm missing as it turns out is what they call a cassette joint to which the cable attaches and manipulates the shift mechanism within the hub. Found parts for a decent price, like 10 bucks on amazon I believe. How did the dumbass at the bike shop not figure this out when I did within minutes? anyways, the disassembly video was a huge help in figuring out what was missing, then the link for the manual were priceless. My fiance has a single speed beach cruiser she likes a lot but has a hard time on hills and really would like some gears. I think if I put a sprocket on this hub she will love it on her bike and its going to cost me about 25 bucks total. I almost trashed the bike because I figured it was a lost cause. Moral of this story, work on your own shit, dont trust a shop. Gorham Ski and Bike in Brunswick Me, is obviously not very good for much more than a chain lube and get your tires pumped up.
I have one Brik Bike that has a nexus 8, i had to change the non turn washers because they broke and all axle rotated. Now i added original shimano non turn washers (at my eye the angle is the same) But i have the problem that speed 7 and 8 dont work. Now it has only from 1 to 6. Is not cable adjustment problem. I need to fix it. Thanks.
Next, assembly Shimano 11 di2.