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My steering his still and cranky I think my bearings have gone not sure how yo undo the head case

The bars feel still and makes a cranking noise when moved, I think the bearing have gone but not sure how to remove them from new bikes.

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  • 391 Answers

Mark:

I don't know what type of bicycle you have, or how modern it is, but the handlebar and steering head are similar on most models. Try to remove the handlebars and steering head from the bike as a unit. There is a large nut at the top of the head tube (where the steering stem goes into). Loosen this nut, and the handlebars and steering stem should pull up and out of the bearing inner races. When you completely remove that nut, the headset will come apart... (including the fork and front tire which will drop out of the headset. If your brake and shifting cables are too short to let you pull the steering stem completely out of the steering head, you'll need to remove the handlebars from the steering stem. If you are careful, the bearing set, spacers and washer will stay on the fork tube when it comes out of the bicycle frame head, so you will know which order to reassemble them in. Either tag them or lay them in the proper order. Now you can clean the bearings or replace them.
It would be a good idea to clean the bearing races at the top and bottom of the steering head too.

Once everything is cleaned and ready to reassemble, grease the bearings and the bearing races and reassemble. When you tighten the stem nut down, make sure that there is no play between the steering head and the steering stem.

Posted on Feb 15, 2014

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Posted on Jan 02, 2017

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goalie39
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SOURCE: How to disassemble crank bearing on Schwinn Mesa Mountain Bike

You wil need a couple of special tools, or be fairly creative with the tools you have.

  1. remove the dustcovers in the crank arms at the crank axle
  2. loosen the crank retaining nut/bolt.
  3. thread in a chank puller and pull the crank arms.
  4. remove the lock ring on the adjustable side of the crank axle (Requires lock ring wrench)
  5. remove adjustable bearing cup.
  6. remove axle and bearings
  7. replace or repair as needed.
Once you have it opened up ou can determine if you need new bearings or crank axle.
to assemble, reverse above procedure, insuring bearing play is minimalized.

Hope this helps.
Ed

Posted on Apr 19, 2009

dunnbiker
  • 8546 Answers

SOURCE: Trek 800 sport needs crank bearings, how to

This isn't Bike Repair 101-level stuff. Take it to a reputable bike shop and have them teach you while they do it. If they're cartridge bearings it's fairly simple. Next time, you can handle it. Be advised, crankset removal tools are specialized and expensive for the casual bike owner who would use them only once every few years..

Posted on Feb 15, 2010

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dunnbiker
  • 8546 Answers

SOURCE: Ball bearings fell out of handlebar connection on 3-speed bike.

Take it to a professional bike shop. They have the knowledge and tools to set it right.

Or take a look at this:
http://www.sheldonbrown.com/headsets.html

The headset nuts were not necessary to be moved for handlebar adjustment. Now the bearing load is too tight. Correct adjustment of the headset requires a delicate balance between tightness and freedom of movement. If your bike has/had the original bearings it's a safe bet they may be due for replacement anyway.

Posted on Apr 28, 2010

dunnbiker
  • 8546 Answers

SOURCE: crank removal for new bearings

Everything you need to know by the makers of the tools you need to own...

http://parktool.com/repair/byregion.asp?catid=61

...unless you just take it down to a Local Bike Shop.

Posted on May 31, 2010

  • 1788 Answers

SOURCE: Bad crank bearings can move crank arms small amount.

clicking can be a stiff link in your chain.

Posted on Aug 04, 2010

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You wil need a couple of special tools, or be fairly creative with the tools you have.
  1. remove the dustcovers in the crank arms at the crank axle
  2. loosen the crank retaining nut/bolt.
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