How do you remove the shell off a #60306 GP-40?

[BlueFox]

How do you remove the shell off of a #60306 Conrail GP-40?

Frank

Update:

Thanks ACY, you steered me in the right direction.
The fuel tank cover is just pressed on and all you have to do is pull it straight off (I used just my fingers, no tools needed)  then you can gain access to the 2 screws that hold on the shell.  You don't have to remove the couplers, just lift the shell straight up and off it comes.

Frank

[ACY]

I think you remove the fuel tank cover, remove the screws, and you may need to remove the coupler and coupler boxes.

[mf5117]

with a small blade screw driver gently pry off the fuel tank you will see 2 small diagonal screws from each other . remove them , gently pull the shell up and forward and it will come off ...