Cleaning Steering Gear Box

[CatMan1]

On my '28 Sport Coupe there is a grease Zerk (or fitting) where most would have a plug for filling the steering column with oil. I could always be wrong, but I think the original owner may have filled it full of grease and that's why it steers so hard. (I'm sure I should check other things) Is there a way to clean out the old grease, or what ever is in there? I don't really want to pull the column out for a rebuild.