Bicycle TutorBicycle Tutor

Show off your bike!

Post Reply 

1973 Schwinn Crank

Related video tutorials:
Author Message
dochoot Offline
Member

Valparaiso, IN
Posts: 27
Joined: Aug 2012
Post: #1
1973 Schwinn Crank
I am stripping bike down to be painted/cleaned. I was able to get the crank set off (big accomplishment for me). There remains a thin metal rim on both sides of the frame I would like to take off if possible. Does this come off? Was going to take frame in to get sandblasted if I can get everything off. Seems like I would need it off.
Thanks in advance.
Aug 23, 2012 05:44 AM
Find all posts by this user Quote this message in a reply
Bill Offline
Veteran Member

NY,USA
Posts: 2,765
Joined: Sep 2009
Post: #2
RE: 1973 Schwinn Crank
Need a Picture please.

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Aug 23, 2012 06:27 AM
Visit this user's website Find all posts by this user Quote this message in a reply
dochoot Offline
Member

Valparaiso, IN
Posts: 27
Joined: Aug 2012
Post: #3
RE: 1973 Schwinn Crank
OK. Will try tonight. Imagine not too hard to post a pic.
Aug 23, 2012 07:22 AM
Find all posts by this user Quote this message in a reply
RobAR Offline
Veteran Member

Mountain Home, AR
Posts: 725
Joined: Sep 2010
Post: #4
RE: 1973 Schwinn Crank
I would imagine what you're looking at are the Bearing Cups if they're in the area where you removed the crankarm. They're a press fit and you should be able to just tap them out from the opposite side.

Wheelies don't pop themselves. (from a QBP fortune cookie)
Aug 23, 2012 02:59 PM
Visit this user's website Find all posts by this user Quote this message in a reply
dochoot Offline
Member

Valparaiso, IN
Posts: 27
Joined: Aug 2012
Post: #5
RE: 1973 Schwinn Crank
(Aug 23, 2012 02:59 PM)RobAR Wrote:  I would imagine what you're looking at are the Bearing Cups if they're in the area where you removed the crankarm. They're a press fit and you should be able to just tap them out from the opposite side.

    seems stuck on there pretty good. use a flat head screw driver from the other side and rubber mallet?
Aug 23, 2012 05:25 PM
Find all posts by this user Quote this message in a reply
Bill Offline
Veteran Member

NY,USA
Posts: 2,765
Joined: Sep 2009
Post: #6
RE: 1973 Schwinn Crank
Another way I remove those is take a dial rod, put it through one so it is against the inner side and tap on the dial rod with you rubber mallet all the way around until it "pops" out. Then do the same for the other one.
Putting new ones on is a different process which requires them to be pressed in. The tool to do this can be made or just bought. More inexpensive to make to which there is a thread right here in the forums... http://forums.bicycletutor.com/thread-922.html . There are other ways to make them too just search the web by typing in "bearing cup press".
Now the how to I will let a few give their opinion and experiences they may be better then my approach Wink.

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Aug 23, 2012 07:55 PM
Visit this user's website Find all posts by this user Quote this message in a reply
xerxes Offline
Veteran Member

Kent, UK
Posts: 609
Joined: May 2010
Post: #7
RE: 1973 Schwinn Crank
You can use an old screwdriver to drift those out with a mallet or hammer.

When you re-assemble the bike, do you plan on keeping the original cranks/chainset?

If you do, ideally you should use a to press to fit the new bearing cups, as Bill suggested. However, you can use a pieced of scrap wood and a hammer to drift the new bearing cups back in. A press is best, but I've fitted dozens of headsets over the years with a hammer and a piece of scrap wood, without any problems, just work around the bearing to keep it straight and go gently.

If you fancy a new chainset when you put the bicycle back together, you could use one of these: http://harriscyclery.net/product/truvativ-bottom-bracket-conversion-american-to-euro-adapter-1335.htm which will allow you to fit a three piece crankset and an English threaded, cartridge bottom bracket.
Aug 23, 2012 08:19 PM
Find all posts by this user Quote this message in a reply
GeorgeET Offline
Veteran Member

Venice Beach, CA
Posts: 1,115
Joined: Apr 2010
Post: #8
RE: 1973 Schwinn Crank
No idea what a dial rod is Bill.

Since you are stripping the frame, you can use heat around the outside and than tap them out with a drift pin or like.You will most likely need to replace them, or convert to a sealed Bottom bracket. Although if it was a one piece crank you would need to change that too. Otherwise if smooth mask well and than strip the paint. You may want to consider a chemical stripper they work great on metal.

Never Give Up!!!
Aug 23, 2012 08:20 PM
Find all posts by this user Quote this message in a reply
Bill Offline
Veteran Member

NY,USA
Posts: 2,765
Joined: Sep 2009
Post: #9
RE: 1973 Schwinn Crank
It's a rounded piece of wood! Lol

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Aug 23, 2012 09:16 PM
Visit this user's website Find all posts by this user Quote this message in a reply
GeorgeET Offline
Veteran Member

Venice Beach, CA
Posts: 1,115
Joined: Apr 2010
Post: #10
RE: 1973 Schwinn Crank
(Aug 23, 2012 09:16 PM)Bill Wrote:  It's a rounded piece of wood! Lol

Piece of wood would not drive out the pressed in cup.You would be making splinters. I call that a dowel. Like I said a steel drift pin or something like that.

Never Give Up!!!
Aug 23, 2012 11:51 PM
Find all posts by this user Quote this message in a reply
Bill Offline
Veteran Member

NY,USA
Posts: 2,765
Joined: Sep 2009
Post: #11
RE: 1973 Schwinn Crank
Guess my spell checking accepted that lol. So dowel rod it is Smile . I used one before George successfully, now it is possible the cups were not in very well.
If one wants to go real cheap just use an old seat post which is made of steel not the aluminum ones.

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Aug 24, 2012 06:21 AM
Visit this user's website Find all posts by this user Quote this message in a reply
dochoot Offline
Member

Valparaiso, IN
Posts: 27
Joined: Aug 2012
Post: #12
RE: 1973 Schwinn Crank
They popped out with a screw driver and a mallet. One actually flew out of garage, rolled down driveway and went into some bushes. Found it. Used the same method to get similar pieces off of the headset. I am just stuck with the kickstand (built in). I posted elsewhere, but any idea how to get it off? Do I really need to send away for a special tool?

I do not plan to replace the chainset etc. I want to keep as much original as I can. I have several modern bikes that suit me well. This is to show off at pint nite rides.
Aug 24, 2012 06:30 AM
Find all posts by this user Quote this message in a reply
Bill Offline
Veteran Member

NY,USA
Posts: 2,765
Joined: Sep 2009
Post: #13
RE: 1973 Schwinn Crank
Was just at the other threads and hope the advice helps Wink . Glad you got the cups off.

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Aug 24, 2012 06:43 AM
Visit this user's website Find all posts by this user Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Replacing crank arms tommywaj 3 451 Jul 5, 2014 06:36 AM
Last Post: cny-man
  Older Giant Acapulco Left crank arm falling off dierad53 1 308 Jun 30, 2014 09:13 AM
Last Post: nfmisso
  Thread busted on right pedal crank zippy 35 43,011 Jun 10, 2014 09:21 AM
Last Post: emmanuelr
  New crank? fishboy316 15 825 May 25, 2014 10:28 PM
Last Post: fishboy316
  Will a 7-speed freewheel work with a single speed chain and crank? ibie1983 6 455 May 20, 2014 01:30 PM
Last Post: nfmisso
  Noise coming from crank dben2010 2 638 May 20, 2014 11:57 AM
Last Post: DaveM
  Wobbling crank Vixturan 2 746 May 13, 2014 08:58 AM
Last Post: Vixturan
  Jammed crank bolt telsalanut.wtm 5 629 Apr 17, 2014 06:16 AM
Last Post: nfmisso
  Need help re-tightening bicycle crank loldamar 2 767 Apr 12, 2014 10:56 PM
Last Post: loldamar
  33T single speed crank? ibie1983 1 428 Apr 10, 2014 08:27 AM
Last Post: nfmisso

Forum Jump:


RSS Forum RSS Feeds / Powered by MyBB

ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy

feed