Only move the awning a half inch at a time till you get it where it needs to be.
How to repair rv awning arm.
If the rail needs to move to the right remove the right screw and pull the awning right.
Remove the awning fabric from the awning arms and then remove the tops of the arms to access the torsion assembly.
If the upper arm rail needs to move to the left you want to remove the left screw and pull the awning in the track to the left.
To replace the cam lock disassemble the awning assembly completely.
Attach the awning railing to the roof of your rv using the screws bolts washers etc.