MY "TEN SPEEDS"

 

 

 

MY "TEN SPEEDS"

 

SITE INDEX   FINDING   BICYCLES   WORK SHOP   TRADING   WHAT'S NEW?

MY "TEN SPEEDS"  

BB REBUILD - INTRO

REMOVING THE BB

SERVICING THE BB

INSTALLING THE BB

 

 

 

SERVICING THE BOTTOM BRACKET

Servicing the bottom bracket is primarily an exercise in cleaning and inspecting prior to reinstalling.  If cleaning and inspecting reveals damage that cannot be repaired, the bottom bracket replacement becomes the flavour of the day.  A prepared bottom bracket, be it cleaned up or replaced, will look nice and shiny when ready to be lubricated and installed.  There will be no debris left to contaminate rolling elements.  There will be no pitted surfaces to hamper the smooth rolling action of bearings on cup surfaces.  There will be no rust.

The bottom bracket assembly and cavity will likely be pretty dirty when first removed.  Debris will be mixed with grease forming a gooey mess - if you are lucky.  It is also possible that the grease will have dried up over the years.  In fact, the grease can become so dry that it looses both its ability to lubricate as well as protect the bearings and bearing surfaces from the formation of rust.

If rust has formed, be prepared to purchase a new bottom bracket assembly.  Rust contaminated or pitted surfaces have no place in a bearing assembly.  If there is no rust and the grease has dried out, a coating of varnish might present itself.  The varnish is hard to remove and I have a couple of different methods for cleaning delicate bearings and surfaces.

I rarely use any kind of solvent when working on my bicycles.  I prefer to dry clean as much as I can with a rag, or soft wire brush or even a piece of aluminum foil.  I do not like to suck solvent fumes into my body, nor do I like to use products that contaminate the environment.  I fall miserably short of my environmental goals, but I do try.  And, there really are very few tasks associated with Street Restoring a vintage bicycle that demand the use of solvents for cleaning purposes.

I have also fabricated a great little tool that has proved to be incredibly useful for doing bearing work.  This small tool is made from a piece of scrap aluminum.  It has a blunt bend on one end and is rounded off at the other.  The tool can be used to scrape bearing cup surfaces and apply lubricant when the time comes.  It is also a useful tool to have access to when building wheel hubs is that task of the day.  I recommend making up such a handy tool for your own restoration work.

Once the bottom bracket is cleaned, inspected and approved for use, it is time to install it.  This process is, basically, reversing the removal procedure.  The only real change to the situation is the need to "set" the proper clearance in the bottom bracket.

NEXT - INSTALLING THE BOTTOM BRACKET

 

 

 

SITE INDEX   FINDING   BICYCLES   WORK SHOP   TRADING   WHAT'S NEW?

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