Owners manual for a shimano bicycle

These sites may prove of assistance. They include downloads for manuals:

https://si.shimano.com/#

https://bike.shimano.com/en-EU/components/road.html

https://www.shimano-steps.com/e-bikes/north-america/en/service

what group set do you have?
Have you looked on the Shimano website? They have a lot of useful information on there, including basic gear setuo details which will generally apply to all groupsets.

A Bike Crank Extractor/Bottom bracket removal tool for Shimano like this (China):-

http://www.ebay.com/itm/New-Bicycle-Bike-Crank-Extractor-Bottom-Bracket-Removal-Tool-Set-For-Shimano-/390891788384?pt=LH_DefaultDomain_0&hash=item5b02f75860

The owner's manual won't talk about that.

http://www.schwinnbikes.com/support/owners-manuals

If it's Shimano, go to http://techdocs.shimano.com/techdocs/index.jsp and find it.

What's wrong with the brake? Usually pads wear out (replaceable) or adjustments are necessary. I've had bikes for over twenty years and never replaced a whole brake for failure.

Use a search engine for video answers. "replace bicycle front brake caliper", for example.

http://www.parktool.com/blog/repair-help/sidepull-brake-service

Pole aroudn here http://techdocs.shimano.com/techdocs/index.jsp

Manuals for components won't teach you how to actually USE anything.

Search engines will answer specific questions, usually with videos.

Shifting, braking, fixing, just about anything.

"Shimano 21" doesn't really narrow it down much.

What exactly are you needing instructions for? Most bikes are just static frames with a bunch of aftermarket (Shimano, for example) stuff hung on them.

Everything on a common bike is found on just about any other brand of bike and the individual components are usually documented at the individual manufacturers' websites.

Places like http://www.parktool.com/blog/repair-help document many of the repair and adjustment procedures.

Google will find tons of How-to videos for assembly and adjustment.

You might find a Raleigh-specific manual for your bike here...

http://www.raleighusa.com/downloads/

Look around here.

http://techdocs.shimano.com/techdocs/blevel.jsp

Mountain Shimano Tourney Shifters

http://techdocs.shimano.com/media/techdocs/content/cycle/SI/Nexus/CoasterHub/SI-7C26C-EN_v1_m56577569830605809.pdf

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/SG/EV-SG-7C18-2396C_v1_m56577569830702946.pdf


You'll probably need some special tools - or take it to a bike shop and let them deal with it.

Maybe start here and if you can't figure it out, take it to a Bike Shop. Ther's only so much useful mechanical advice one can remotely lend with no details.

Surf over to http://bike.shimano.com/ and find your shifters.

They'll be under Products >> (bike type) >> (group name )>> Shifters .... Tech Docs

Or swing by a Local Bike Shop and they'll be happy to assist you as well as start an ongoing relationship with you. Buy something there as thanks.