Shimano Nexus 8 Speed Hub SG-R31 Disassembly and Assembly

Рет қаралды 11,620

Күн бұрын

Пікірлер: 22

@harveywong2973 26 күн бұрын

Thanks for posting your video, it's the most detailed video with explanation. I've watched quite a few (including German). I followed your information and things went very well. I would add that the axle can easily be separated from the bearing cup with light taps, and if you hold the opposite end of the axle, it won't fall to the ground. For the do it yourselfers, vids like this are gold....

@marius8349 11 ай бұрын

These hubs are amazing, I've opened mine from pure curiosity and the clutch spring came off on me, it took me almost three days to figure out everything, of course with help from KZbin, mine is a Nexus 5 speeds E bike design hub on a Pegasus bike with Bosch motor and Gates belt transmission. Nice job with your video, it helps a lot of people.

@WalkerChris13 Жыл бұрын

This really helped me with my hub assembly. You're great!

@solaroweder3707 6 ай бұрын

Thank you for this detailed teardown. I'm using two of these transmissions in turn on my bike. Both of them have been in use for about 20.000 km. It's videos like this one that enable me to continue maintaining them and keep them running.

@donaldmacpherson8308 Жыл бұрын

Thanks! Without this video i could never have managed the hub assembly.

@jbaccanalia 9 ай бұрын

Man! Shimano should be paying you for this brilliant tear down. Great analysis of every part. It's no longer a mystery. The string trick is going in my repertoire. Keeping order and directionality, It's way better than a container.

@jurikristjouw 3 ай бұрын

Thank you so much for showing in detail. Helped a lot.

@ChrisBliss-ln1cq 7 ай бұрын

Thanks so much! Brilliant. You can use a drill chuck, detached of course, to manipulate the spring ,by clamping the end tab in the jaws. Easier to handle plus won't damage it. Enter here only those with the patience of Jobe! 😂

@rhulzinga67 11 ай бұрын

Thanks a lot. Now I’m prepared for my own nexus adventure 😃

@namdarbolour9890 8 ай бұрын

Excellent video and analysis, thanks! To press the right side cone down, I've found you don't need the Shimano special tool, or even your socket idea (which is brilliant). Just use the locknut to drive down the cone (with the 3 parts under it) down the axle, until the special washer under the locknut bottoms out against the shoulder on the axle. This is what you're doing anyway during the final tightening of the locknut, and what locates the cone to its designated location on the hub. (The left cone does the bearing adjustment.) Just make sure the right cone is square (not cocked) on the axle before starting to crank down on the locknut. Also, make sure the two fingers of the shift collar are positioned in the space (circular slot) between the axle and the cone, and that as you bottom out, they are also positioned in the slot area of the star washer that attaches to the cassette joint, else interference will keep it from bottoming out. FYI, if you use the special tool, it doesn't drive the cone down all the way, rather leaves the last bit to be pressed by the locknut I speak of. You can see this final press-fit-by-the-locknut in other videos on KZbin because they have to use a wrench for about the last 2 turns to bottom out the cone! Hope this helps. A video would help, I know, but I have to learn how. Again, thanks for taking the time to share your knowledge.

@RuolfGoegemeente 9 ай бұрын

Thanks, very helpfull video, and good quality (both sound, sharpness and light). Certain parts I've replayed many times ...

@silverchannel8582 Жыл бұрын

Thanks, helped a bunch!

@McKav 18 күн бұрын

Hi thanx for this. Im considering a second hand bike with this drivetrain in 🇦🇺 & am undecided. I've seen a few comments regarding problems & am wondering if I should steer clear. Have you had any issues that led to your disassembly? Thanx again Mike

@pierrerobert6458 5 ай бұрын

A genius !

@ЭЛИВОЛГЕН 4 ай бұрын

Man, thanks a lot! Your video helps me sooooo much!!! I have the same hub. But I can't put together two main pieces in on (see video on the 34th min.) I need an advice.

@ThienTran-ly9fi 8 ай бұрын

What kindnof oil do you use and what kind of grease do you use? Thanks a bunch

@Siroitin 6 ай бұрын

So, I have to disassemble the whole thing to change ball retainers?

@jurikristjouw 3 ай бұрын

yes, the outside ball bearings are 2x13 and the bigger one is 29 balls if I counted correctly. All 3/16". I could not find a replacement for the needle bearings. I am rebuilding now and had to clean every needle bearing with a dremel and brass wirewheel.

@Siroitin 3 ай бұрын

@@jurikristjouw I just soaked it in alcohol and after that in ATF. Added some grease to gears. Gears are somewhat stiff now but it might be good for upcoming winter.