Here's one of my favorite positions when it comes to making the guitar sound like a pedal steel. Very important to use three fingers to fret, as well as that index finger to help push up the bend,a s well as push the unwanted strings out of the way! Don't try to fall back on using a barre to play the two top strings, you'll be glad later!
 
When I was a kid and loved The Byrds with Clarence White, I didn't realize he had invented a "B-bender" to get that pedal steel-like sound, so I just started imitating it this way, because I was sure it was a guitar I was hearing, and NOT a pedal steel, so I came up with this style!
 
Also, be sure to remember that you are mimicking a mechanical device here, so the bend must have that very precise "pedal off, pedal on" kind of clarity and pureness, unlike most blues-oriented bends. So give it a try, and make sure all the physical aspects are in place, and be sure to train your ear, and get those bent pitches perfect! Hope you enjoy! —Arlen Roth