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Step 1
Assemble the proper tools. You will need a splined bottom bracket tool and a wrench (socket wrenches are best).
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Step 2
Make sure you have the correct bottom bracket. Does it have the appropriate threads (most likely you are dealing with a standard English bottom bracket, but make sure)? Is the spindle length correct for the cranks you plan to use?
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Step 3
Clamp your frame into the repair stand.
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Step 4
Inspect the bottom bracket shell. It should have been faced, and the threads should be clean.
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Step 5
Place a liberal amount of grease on the threads.
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Step 6
Find the drive side cup. This should be attached to the cartridge body and the cup should have a slight lip on it. There may also be an R and an L on the cartridge body. You want the R side.
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Step 7
Insert the cartridge into the bottom bracket shell on the drive side, and thread the drive side cup into the frame. For a standard English bottom bracket, this is a LEFT HAND (REVERSE) THREAD, so it will thread in and tighten COUNTERCLOCKWISE. Start turning with your fingers first, to make sure you don't cross thread it.
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Step 8
Using the wrench and bottom bracket tool, tighten the drive side cup until the lip presses up firmly against the outside of the bottom bracket shell.
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Step 9
Thread the non-drive side cup into the bottom bracket. This is a normal right hand thread. Again, start with your fingers to make sure you don't cross thread it.
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Step 10
Tighten the non-drive side cup against the cartridge body. You want it tight, but don't over tighten - you can damage the cup, which is often made of aluminum. If you are unsure, check the torque specs for the bottom bracket, and use a torque wrench.
