How to replace a bicycle bottom bracket. Shimano BB UN300 failure

Hello fellow cyclists!
In this video we will see: How to change a bicycle bottom bracket.
You will see a few tricks used in the workshop. A bicycle bottom bracket makes a clicking sound. The bottom bracket fails when the bike is ridden in wet weather.
The bicycle bottom bracket is a consumable. Remove the bottom bracket. Sometimes the knot unwinds easily, but not always, so you need to use a large lever arm. This detail is the secret. Remember this detail, we will need it. There are some nuances to this procedure. Everything seems to go like clockwork.
The dry sound of a bicycle bottom bracket. Clean the frame before installing a new knot. Shimano bb un300 Remember this detail, we will come back to it later. Bicycle frame thread lubrication. Lubricant is used under the name "Divinol Fett Top 2003" is a German grease.
It repels water well and won't clog the joint. Everything must be thoroughly lubricated so that there are no problems in the future. How to install a bicycle bottom bracket. The right side rolls up perfectly. Everything is in order. Tighten as much as you can until the frame bursts ;-). It is better to tighten the right side more, it likes to unwind.
And here is the setup that was waiting for us. The bottom bracket has a left and a right side. The left side adjusts the play. The manufacturer did something wrong and it just spins horribly. Can't turn it. Although the thread is ok. We use the old part from the previous bottom bracket.
They are compatible as you can see. rolls up perfectly. This, of course, is a base. What to do when the bottom bracket does not turn. The new part is really cool, it has a new boot that prevents water from getting inside. But it is made of aluminum and has problematic threads. The old one has a steel knot. At this stage you have to tighten the carving very carefully, little by little. Check each time how our spinning bicycle bottom bracket so as not to overtighten it.
It shouldn't wedge. Looks like we did it! ))))
A video characterized by absence of speech, featuring solely mechanical audio cues. Language agnostic; globally relatable. Presented in a DIY video presentation.
This video is a must for cycling enthusiasts.

00:00 How to replace a bicycle bottom bracket
00:33 Bicycle bottom bracket makes clicking sound
01:05 Bicycle bottom bracket removal
02:35 Shimano bb un300
02:56 Lubricating bicycle frame threads
03:39 How to install a bicycle bottom bracket
04:01 Tighten as much as possible until the frame cracks ;-)
04:31 Defective bottom bracket
05:28 What to do if your bottom bracket will not turn

#cycle #bikeworkshop #mountainbike

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