Joined: Feb 2012
Posts: 19,381
Likes: 5,527
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Some brands of FH bodies do remove with the allen wrench installed from the LH side of the hub. And keeping track as to which way to turn the tool (or the wheel if you clamp the tool in a bench vice) can be tricky. Some FH bodies thread directly into the hub shell. Some have a bolt drawing the body onto the shell. 10 and 11 mm wrenches are the most common sizes.
I note the lack of hub brand in the OP. Andy.