WEB Bottom Bracket Removal and Installation
Types of Bottom Brackets
A bottom bracket is the part of a bicycle where the cranks are attached to the frame. The type of bike bottom bracket you'll find on a low to mid-end model has cottered or one-piece cranks. These cranks are not removable from the axle spindle. This makes servicing the bottom bracket more difficult.
Cottered Cranks
Cottered cranks are a classic design that has been used for many years. They are relatively simple to remove and install, but they are not as strong or durable as one-piece cranks.
One-Piece Cranks
One-piece cranks are a more modern design that is stronger and more durable than cottered cranks. They are also easier to remove and install.
Tools Needed
To service a bottom bracket, you will need the following tools: * A bottom bracket wrench * A crank extractor * A hammer * A drift punch * A grease gun * A rag
How to Remove a Bottom Bracket
1. Remove the cranks using a crank extractor. 2. Remove the cotter pins or the one-piece crank bolts using a hammer and drift punch. 3. Unscrew the bottom bracket cups using a bottom bracket wrench. 4. Clean the bottom bracket shell and the bottom bracket cups.
How to Install a Bottom Bracket
1. Apply grease to the bottom bracket shell and the bottom bracket cups. 2. Screw the bottom bracket cups into the bottom bracket shell. 3. Install the cranks using a crank extractor. 4. Insert the cotter pins or the one-piece crank bolts and tighten them using a hammer and drift punch. 5. Adjust the chain tension and ride your bike.
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