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I need to rebuild a Schwinn bicycle crank hub, I need help

Pedals were 'loose' so I took the crank hub assembly apart, ball bearings fell out?! I need to rebuild/replace the whole thing ... if I could get an exploded diagram it would make it easy to order parts, can you help? this is a Schwinn Mountain bike = model Sidewinder 2.6fs serial # 06c18928 / SNMNG can you help?

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Any good bike shop will help

Posted on Apr 13, 2015

Testimonial: "thanks man, I have the 'Park ' tool to remove the cranks and bearing cup, so I thought between the internet and other handy men types, I'd give it a try myself."

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What might be causing a Noise and rough pedaling from main crank area of the bike?


Sounds like a bearing issue in the "bottom bracket" or the housing that holds the cranks, in other words. I would remove the crank and inspect the bearings. There are several different types of bearings. If your bike uses sealed bearings, your only option is usually to just replace them. a "caged" bearing consists of several actual ball bearings, set into a round metal cage that holds them in place. If you have caged bearings, remove them clean them thoroughly, and then re-pack them with bearing grease before reinstalling. also be sure to clean the bearing cups, or any surface that they may come into contact with. Any dirt, sand, or grit makes for a quick death for your bearings. Some bikes just use free floating ball bearings set into the bearing cups. If this is the case, smear a blob of grease into the bearing cups. This will hold the ball bearings in place while you install the rest of them. Be careful when re-inserting the crank not to knock any of the ball bearings down into the bottom bracket. From the sounds of your description, you may be missing a ball bearing or two. Check to make sure there are no large spaces between any two ball bearings. If you could fit another ball bearing into the bearing cup without crowding any of the others out, then you are missing a bearing. Re-assemble everything as it came apart. When tightening the crank into the bottom bracket, be cautious not to over tighten. The crank arm shouldn\'t have any "wiggle" from side to side, and yet should still spin freely on its bearings. I sincerely hope this helps.

Aug 14, 2014 | Cycling

1 Answer

Back tire was dissassembled and the bearings fell out i need to learn how to assemble the entire back tire including the gears.


Since you provide no useable details regarding the hub brand or type we can't offer specific directions.

Even so, you have an eyeball on all the parts and a keyboard so your best bet would be to web surf for the many responses to "rebuild rear bicycle hub" until you find somethign that looks like yours. OR add in some detial like 'shimano' and a model number, maybe check the manufacturer's website.

This link covers many styles and covers the special tools you will need.

http://www.parktool.com/blog/repair-help/categories/hub-service

Happy hunting.

Sep 23, 2011 | Schwinn Cycling

1 Answer

We are assembling a Schwinn Jasmine bicycle and it seems the front fork is too narrow for the wheel.


You mean somebody stepped on it in the crate? Give it a pull apart while stepping on it, make it fit, the fork needs to go in between the bearing race and the nut. Make sure the bearings are not tight, not loose either. Hope this helps.

Dec 26, 2010 | Schwinn 16" Girl'skids Jasmine Bmx...

2 Answers

Bad crank bearings can move crank arms small amount.


That would depend on the style of bearings (loose ball or caged balls vs sealed bearings) and possible bottom bracket damage.

Either way, a Bike Shop mechanic would probably need to assess it for you. Special tools are usually involved.

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

May 23, 2010 | Schwinn Mesa Gs Mountain Bike

1 Answer

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

Apr 16, 2009 | Schwinn Mesa Gs Mountain Bike

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