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David Hill Posted on Mar 25, 2015

How do I Adjust the bearings crank ? (bottom bracket axle)

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Les Bradfield

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  • Contributor 33 Answers
  • Posted on Apr 02, 2015
Les Bradfield
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It is according to what your crank design is.
1st. design. This is a solid crank. Look at your crank. One side will have a nut, and a race with slots in it. If this is yours then you take off the pedal on the side of the nut. Now take off the nut, use a screwdriver to remove the race. Pull that bearing out, then push the crank through the opening, removing the other bearing. If you have a multiple speed bike you have to remove the sprockets first.

2nd design. After removing the sprockets there is a bolt holding the crank arms on the shaft that the bearing are on. Remove the cranks and then remove the bearings the same as above.

4 Related Answers

Anonymous

  • 8546 Answers
  • Posted on Apr 23, 2010

SOURCE: bottom bracket bearing failure

Take it to a Local Bike Shop and have them evaluate what's compatible with it.

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Anonymous

  • 347 Answers
  • Posted on Apr 07, 2011

SOURCE: bottom bracket need replaced. needs a

impossible to tell you without knowing the bike brand and model and year, although you have provided that 1999.

If you take into a bike shop, which is the usual place to purchase the parts you need, they will be able to tell you what size Bottom Bracket will fit your bike, also what options you will have for replacement cranks and bottom bracket. This could be a very complicated issue when replacing with parts that are 11-12 years newer, the shop will be best equipped to give you all your options.

Anonymous

  • 2080 Answers
  • Posted on Apr 10, 2011

SOURCE: Raleigh Bicycle Passage 3.0 Crank arms

Yes, once you remove the crank arms and the pedals, you will need a special tool to remove the bottom bracket that contains the sealed bearings.

Here is a set of nice quick YouTube videos on how to replace a bottom bracket which shows the tools and techniques required:

http://www.youtube.com/watch?v=moIUDAyRH2I&NR=1

http://www.youtube.com/watch?v=QrkxaNgL6Y4


Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will automatically open a new browser window for you and display the video.

Here is a link to the general description of your bike:

http://bicyclevillage.com/product/raleigh-womens-passage-3.0-3894.htm


And here is a link to the technical details:

http://bicyclevillage.com/product/specs/raleigh-womens-passage-3.0-3894.htm


If you want to replace the bottom bracket yourself, just bring those details into your local bike shop and ask them for the correct tool and replacement bottom bracket to purchase. If you just wanted to have them do the work, I don't think they would charge you more than $30 labour for it, plus the cost of parts of course.

Anyway, please comment back here to this page if you have any questions, have difficulty accessing the links, or just require further general assistance and I will respond as soon as I see it.

Thank you very much and good luck.

Joe.

Anonymous

  • 8546 Answers
  • Posted on Sep 02, 2011

SOURCE: Where can I find a

No one makes manuals for specific models of ordinary bikes, especially Schwinn. Try their website for the generic manual.

As far as the BB goes, it hardly matters what it IS right now. You can and should replace it with a cartridge-style one to make adjustment a no-brainer. A bike shop should be consulted as there is a Black Art to matching up the old cranks to the new BB shaft so the chainline stays about the same. Special tools are also required but DIY is possible.

http://www.parktool.com/blog/repair-help/categories/bottom-brackets

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Related Questions:

0helpful
2answers

What size is my bottom bracket for a Nishiki Kinzua 29 Men's Mountain Bike

hi if i remember correctly to size up for a bottom bracket, flip your bike upside down resting on handle bars and seat carefully not to damage anything, and where the bottom bracket go's through the frame of the bike you take a tape measure and measure the width of only the frame housing where the bottom bracket go's into this is a lot easier to do when the crank arms are removed. also on some bottom brackets when removed from the bike has all the data stamped on it depending on the type of bottom bracket. if not measure the width of the frame where the bottom bracket sits in too and that will be the size of the bottom bracket you need, then determine which type it is once you have remove the cranks arm which are attached to the bottom bracket could be splined drive or square tapered type bottom bracket basically the shape of the metal part that the crank arms push and bolt on to then match up on a cycle part website.
tip

Bottom Bracket & Spindle Replacement of LeMond RevMaster

Part 1 Video Discussing the Dis-assembly & Inspection of the Bottom Bracket & Spindle for a LeMond RevMaster Bike

  • This Part 1 video will demonstrate how to inspect and adjust or remove and replace the bottom bracket and spindle on your Lemond Revmaster
  • Tools needed for this procedure:
    • 8mm Allen Wrench or Socket
    • Cotterless Crank Puller Tool
    • Lock Ring Removal Tool
    • Bottom Bracket Tool
    • Phillips Screwdriver
    • 4mm Allen Wrench
    • Bungee (optional)
    • Rubber Mallet
    • 7/8" Wrench
  • To begin remove the belt cover, there are four screws
    • You will need a 4MM Allen wrench
  • Now remove the two screws on the back from the opposite side of the bike
    • You will need a Phillips screwdriver
  • Now position the crank arm as seen in the video and remove the belt cover from the bike
  • Before removing the drive belt, tighten the brake assembly so that the flywheel is locked in place and loosen the torque on both bolts using an 8mm Allen wrench or socket
    • Do not remove them at this time only loosen them by a half a turn or so
  • Using a 7/8" wrench loosen the belt idler
  • Now use a 4mm Allen wrench to loosen the tension adjustment bolt completely, but do not remove it from the frame
  • Now remove the drive belt
    • To aid in this process you can use a bungee to slide in behind the belt at the top, as shown in the video
  • Then pull away from the bike while spinning the crank arms
  • Now remove both crank bolts with a 8MM Allen wrench or socket
    • Removal of the crank bolt on the left side of the bike is the same as removal from the right side
  • Now remove the crank arms with a crank arm puller, threading the outer portion into the crank arm as shown in the video
    • Be sure to thread the outer portion in as far as possible to prevent damage to the crank arm threads or the tools threads
    • Use a 7/8" wrench to make sure the outer portion is threaded in completely
    • Now spin the handle clockwise to press the crank arm off of the bike
    • Be careful when the crank arm comes off as if you are not holding it, it can fall in the floor
    • Also use the wrench to loosen the tool before removing the crank arm from the unit
    • Now you can unthread the tool from the cranks arm by hand after removing the crank arm from the bike
  • Next inspect the bottom bracket cups for looseness, to do this use the bottom bracket tool by hand to see if you can turn either of the bearing cups
    • To further verify the adjustment of your bottom bracket use a rubber mallet to tap lightly on each side of the spindle to check for movement from side to side, if you have movement, or one or both of the bearing cups is loose, you need to re-adjust the bottom bracket. If you are only inspecting the bottom bracket and did not find any need for adjustment you would re-assemble the bike at this point
  • Once the crank arms are removed look closely at the spindle
    • It should have defined edges and be smooth
  • As you can see by the video our spindle needs to be replaced
  • Next you will need to remove the lock ring
    • The lock ring is around the bottom bracket cup on the left side of the bike
      • In the video is an example of a lock ring
    • To use the lock ring tool you slip it over the lock ring using the three notches and torque the lock ring in the proper direction
      • This one needs to be turned counter-clockwise to loosen
    • Then remove the lock ring by spinning it off the bearing cup
  • Next you will need to use the bottom bracket tool to remove the bottom bracket cups
    • Begin with the left side
      • Slip the tool into the splines of the cup and loosen
        • For stubborn bottom brackets use a 5/16"-24 x 2" bolt and some washers with a 1-1/4" wrench
          • Slip the tool into the splines and thread the bolt with the washers into the spindle
          • Get it snug but not completely tight
      • Now use the wrench to turn the cup counter-clockwise for the left side and remove it completely
    • Remove the cup from the right side now
      • Slip the bottom bracket tool into the splines of the cup and turn it clockwise to loosen
        • For stubborn bottom brackets use a 5/16"-24 x 2" bolt and some washers with a 1-1/4" wrench
          • Slip the tool into the splines and thread the bolt with the washers into the spindle
    • If you cannot get the cups loose with this method try turning the bike on its side to get better leverage as shown in the video
  • This concludes the dis-assembly and inspection procedure of the LeMond RevMaster bottom bracket & spindle
  • Click here to see Part 2, re-assembly and installation to complete the replacement procedure
Video of Bottom Bracket and Spindle Replacement Part 1 Dis assembly LeMond...
0helpful
2answers

I got a nishiki anasazi bike and im looking for the right bottom bracket. The information the i find is a "square paper bracket". so im confuse about the rigth size.

With square-taper cranks, the bottom bracket spindle length required is determined by the particular brand/model of crankset.
You can find the specifications online if you do a search using the brand/model of crankset. You will need a crank puller and bottom bracket tools to change it out. The main crankarm bolts should be tight, around 30 ft-lbs of torque.
Apr 24, 2020 • Cycling
0helpful
2answers
0helpful
2answers

Schwinn mountain bike specs for bottom bracket replacement. SN: SNXDS16M34041

Serial number is of no help at all in determining replacement. The bottom bracket depends on the model of crank installed, which can vary even within the same model of bike. Take to a bike shop, post a picture of the crank and give the model name of the bike, or do some research at: Repair Help

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

0helpful
2answers

Bottom bracket need replaced. needs a new crank set. what size if the bottom bracket and what size crank set is recommended, or does the bottom bracket need to come out to find the size. bought the...

impossible to tell you without knowing the bike brand and model and year, although you have provided that 1999.

If you take into a bike shop, which is the usual place to purchase the parts you need, they will be able to tell you what size Bottom Bracket will fit your bike, also what options you will have for replacement cranks and bottom bracket. This could be a very complicated issue when replacing with parts that are 11-12 years newer, the shop will be best equipped to give you all your options.
Apr 07, 2011 • Cycling
0helpful
2answers

Noise once every revolution

You either have a bad bearing in one of your wheels or in your bottom bracket ( where the crank is connected ) It could also be a pit in the bottom bracket where the bearings ride. If this thump occurs about the same spot on your cranking revolutions I would say it is a pit in that bottom bracket. If it were the bearings themselves that were worn the thump would be more random. The first thing to do would be to remove the chain from the crank. Then crank the pedals using your hands and see if you can feel that thump or vibration with your hands. If you feel it there then replace the bottom bracket or get new bearings. If this does not solve your problem then check the wheel bearings. Just take the wheels off and spin them while holding onto the hubs with your hands. If the wheel bearings are bad you should feel a roughness or vibration while spinning them. Since you described this as a thump I would say problem is not your wheels. They would make more of a clicking sound. Good Luck
Jan 27, 2009 • Cycling
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