Stupid trailer wheel grease cap question...

[Jake Hodges <jake@codeworm.com>]

So, I got the Harbor Freight utility trailer..  The bearings and seals and 
stuff for the wheels were haphazardly flung inside the hubs, and the grease 
caps were pressed in for shipping.  How do you get these caps off without 
destroying them?  I can't get a bite on them with my channel locks.

Thanks,

Jake