I believe I'm east of you about 100 miles; you shouldn't have any problem getting to 139W unless trees, hills, or buildings get in your way.
Though there hasn't been much to look at recently, I get to 139W on my BUD with a 24" actuator.
Once everything was pretty much on the arc, I set the dish over to the east all the way with actuator fully retracted. Adjusted the actuator bracket past where 139W would be on the polar mount setting. Once the actuator was set and locked down, bumped the dish to set the mechanical limiter switches in the actuator (i.e., just W past 139W). I used a TV and receiver at the dish to see what was going on with transponder lock as this occurred.
Once mechanical switches were set, then worked on programming dish mover/receiver. As it stands, 139W is the last satellite prior to reaching mechanical limits in the actuator.