Removing shell for S2 dcc/sound

[train man]

The rear truck on my S2 switcher has no power pickup. I suspect a detached wire. It would be an easy fix, I think, if I could figure out how to get the shell off. I have the exploded view drawing that came with the loco. But that's not that much help. It looks like I need to detach the handrail between the main body and the step, both front and back, But it seems the handrails may have been glued on. When I try tugging on the handrail to remove it, it will not budge, even using a fair amount of force. In fact, it feels like if I pull any harder, the handrail will break.

How do I get the shell off?

[train man]

Oops. Posted in wrong forum. Please delete. I have reported in the HO forum.