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Old 02-23-10, 07:13 AM   #1
horaceunit
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How to Identify needed tools

Here is one for all you ace bicycle mechanics out there! I need to pull the cranks and bottom bracket off my Trek 7100 so I can lube it (possibly replace bearings) and I am thinking I might try changing out the cranks as well. There are a lot of places on the net to find very good tutorials on how to do it, but how do I know which specialty tools I need to get first? This is what I know from Trek's site about the cranks: Shimano M151 48/38/28 w/chainguard.

I have had it up on the stand, and while I have worked on cars and motorcycles, I'm not sure what I need to look for, or what the part (Shimano M151) actually tells me beyond the obvious. Any thoughts, or direction to the proper resources is greatly appreciated!!
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Old 02-23-10, 12:31 PM   #2
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Park Tools .com is a good source
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Old 02-23-10, 04:48 PM   #3
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You will need a crank puller for square tapered type crank. If it has a cartridge bottom bracket you will need a BB extractor to replace it, but the bearings are not accessable for maintenance.
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Old 02-23-10, 09:50 PM   #4
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Quote:
Originally Posted by AndrewP View Post
You will need a crank puller for square tapered type crank. If it has a cartridge bottom bracket you will need a BB extractor to replace it, but the bearings are not accessable for maintenance.
This is correct.

The crank is square taper - it'll either use a 15/14mm recessed nut or a 8mm hex to remove whatever is securing the crank on. You'll then need a square taper type crank puller. Park CCP-22



Trek doesn't even list the type of bottom bracket it has - you'll need to know this in order to select the correct tool for removing this from your frame. You can take a picture once the cranks are off and we can determine the correct tool for you.
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