Hello there. What has more than likely happened is that one of your crank arms have come loose. The front covers to access the crank arms are removeable but difficult to do. There are 11 screws and three clips that hold the covers on each side. You will also need an 8 inch phillips head screw driver to remove the covers.
First remove power to the machine.
Second, Using the 8 inch screw driver remove the screw in the hole that is visible on the side of the unit.
Then remove the screw in the hole located just above the arm assembly
Another screw is located inside the cup holder remove that as well
after removing the screw in the cup holder you can lift the cup holder up slightly and access the two screws for the lower cover. There is also another screw under the cupholder holding the side shield on remove that as well.
Next go to the bottom of the lower cover. There will be two screws holding the lower part of the cover on. There are clips on each side of the cover which also connect it to the side shields. If you pull gently on the sides of the cover it will pop off. Only three more screws to go.
If you have the ability to tilt the machine on its side it will help in this step. There are three screws also holding the bottom of the side shield on. remove those as well.
The only thing holding the cover on now are three clips in the front of the machine. These will be difficult to remove! You have to partially seperate the two shields from the top and working your way down pull the two shields away from each other. They will make a loud noise when they come loose so beware.
Once you have gotten the cover loose you can raise it up over the arm assembly.
You can now start working on the original problem.
Once inside you need to locate the crank arm assembly. (this is where the pedal leg connects ) You will see a bolt going through the crank arm where it connects to the crank shaft. both the right and left crank arms should be flush with the crank shaft. To realign the arms you must loosen the bolt holding the crank arm and also loosen the allen screw holding the locating key in place. The arm should then be movable to a point where it can be tapped back flush with the crank shaft. Retighten the bolt loosened in the previous step first. Then retighten the locating key allan screw Be sure to use alot of pressure when tightening the crank bolts to be sure you will not have to do this again.
Reverse the procedure for the covers to reinstall them.
Good Luck! Tim