Does your front axle look like this???
but If yours dont look like this.... can you send pictures???
if so the bolts underneath come loose first and they might take a tap with a hammer on the allen head wrench. I like to use an allen on a socket...then you can tap the socket easier. heating these with all the chrome here can do damage.
Like Bigincher says use the smaller torch, they are easier to control and dont blast flames all over like a plumbers torch can.