Arvicola Terrestris
100 W
I don't think this subject is dealt with elsewhere in here.
I had a friend use my Christiania Cargo Trike for a weekend, what i didn't think about was that since he is a professional sportsman, and his legs is among the strongest i Norway, it only took him 24 hours to break the bearings in the bottom bracket on to of my bicycles.
So hence the winter it's time to replace theses bearings, the first bike was no problem (normal bicycle). But my cargo trike with a Bafang bbs02 48v 750w is not so straight forward (serial number 1402200287 from March 2014 and has run approx. 4000km).
First I ordered a tool to remove the nut with four slots (10$), the tool didn't fit, so i had to machine it to make it fit (milling machine i think it's called). The tool was made of Kryptonite (probably white cast iron or martensitic steel) so i ruined for 200$ of drill bits.
If you disassembly the crank, don't expect to be able to assemble it again with the original parts, it can be done, but there is much that can go wrong. The bearings can't be pushed out, they has to be gently hammered out with a mandrel. And before you know of it you have small balls all around you shop, or needle bearings that are damaged.
to be continued...
/philip
I had a friend use my Christiania Cargo Trike for a weekend, what i didn't think about was that since he is a professional sportsman, and his legs is among the strongest i Norway, it only took him 24 hours to break the bearings in the bottom bracket on to of my bicycles.
So hence the winter it's time to replace theses bearings, the first bike was no problem (normal bicycle). But my cargo trike with a Bafang bbs02 48v 750w is not so straight forward (serial number 1402200287 from March 2014 and has run approx. 4000km).
First I ordered a tool to remove the nut with four slots (10$), the tool didn't fit, so i had to machine it to make it fit (milling machine i think it's called). The tool was made of Kryptonite (probably white cast iron or martensitic steel) so i ruined for 200$ of drill bits.
If you disassembly the crank, don't expect to be able to assemble it again with the original parts, it can be done, but there is much that can go wrong. The bearings can't be pushed out, they has to be gently hammered out with a mandrel. And before you know of it you have small balls all around you shop, or needle bearings that are damaged.
to be continued...
/philip