Changing Headlamp

[FreshFish]

Hey folks, I have a 1970's model Texas 2-10-4 that I need to replace the headlamp on...Question is how does one do it...Having a problem of removing the shell off the chassis after removing the three screws ?? Thanks.

[ta152h0]

try pulling on the smoke box cover first!

[FreshFish]

That's the  problem I can't get the shell off to get to the smokebox/headlamp area...Is there a trick to it ?? Thanks