Help me please!!!
 

I'm trying to remove the crankset off this vintage bike I bought- but the chainring hits the frame and doesn't let Me take the cranks off. The cranks are the one piece s types
And the frame is a 1970s amf roadmaster.
Anything will help
This is frustrating the cr** out of me!
Thanks!

Turn the crank so the right arm is pointed upward. This will allow you to snake the left side of the crank out of the frame. Sometimes it helps to have a screwdriver handy to push the bearing cages out of the way.

As FB said- you have a one-piece "Ashtabula" crank: http://sheldonbrown.com/opc.html .

I overhauled hundreds of these in my bike shop days. Once you get it oriented correctly, it should just about fall out.

Didn't work- there's something keeping it from coming out- where the bearings rub on the frame, that's keeping the the cranks from budging

Why another thread forking in the process? FBinNY was already getting started with helping out?

I agree with both...but also look at the bottom the shell (the underside) for any evidence that screws or rivets were put in for some reasons or another...chain guards, wire minders...kinda doubt it but you never know.

Having said that, please don't "fork" threads...stick around in the original and be patient.

=8-)

Doesn't look like it... There's an engraved serial number looking thing- 4904
Sorry for "forking" still new

Go back and read Jeff Wills post...

1. Screwdriver or some "nudging/picking" tool handy.
2. Hold the crank with right arm up and left arm down.
3. Slide the crank all the way right...until the left arm elbow is really close to the left side cup. (Make sure left side bearings, cones and nut have already been cleared out.)
4. Then tilt up the left arm and tilt down the right arm at the same time while clearing out the right side bearing if you can.

That should get the left side arm elbow inside the shell against the top and the right arm elbow partially out and against the bottom of the right side of the shell. As Jeff Wills said, "it should just about fall out."

=8-)

Sigh... Probably should've mentioned this earlier, the bike is upside down resting on it's handle bars and seat. I'm not sure what you mean by "up" or "down"
Or If youre giving me directions based on the bike being upright on
A bike shop rig.
Sorry

Ps. Tried again with a flathead screw driver and no dice-

Bike right side up...

By left we mean side without the chainring. By right we mean the side with the chainring.

The right side bearing needs to be gently pried loose as you start the tilt process...else a jam occurs.

Hint: Try to get the following germ in your brain - if the crank went in clean, it will also come out clean.

Slow down, and with that little germ in your brain...try it again.

=8-)

Oh my god! I did it! It just fell right out!!! Holy crap!!! Thank you guys so much! If it went in clean it'll come out clean!!! It just fell right out... Hours of work for one little 'plop' geez....
Sigh.... Thanks again guys! Appreciate the help!

Congrats...it's late...get some sleep...

=8-)

It's morning now. You up?

Got up at 7:30am...just started my yearly yard sale....

...and the only things selling so far are my son's toys...

=8-)

Thanks again everyone!