When I try to form the alternator for the steam turbine, I cannot access the block that I'm supposed to hit with the hammer because the block from what I assume to be the axle of the steam turbine blocks it.

What I do is break that block, activate the alternator first and then the turbine, I assume that both structures must be connected or "activated" (meaning hit with the hammer) in a certain order, because so far I haven't been able to get the setup running.

Thank you in advance!

If you're playing with v100 or whichever latest version of MCT there is, you shouldn't need to be doing this; hammering the middle block on both ends of the turbine-alternator multiblock separately forms them.

Check your alternator placement; the light engineering blocks should be facing away from the turbine.