Many of the old school pedals literally have to be disassembled before the bearings can be accessed, cleaned, greased, and adjusted. The dust cap or end plate is held in place/part of the side plates or rubber blocks. Not really a big deal unless the screws/nuts are corroded or the screw heads are messed up. Should only take a few minutes to take it apart.

Most new pedals come overtightened and under greased. That's why many do servicing and adjustments to get their pedals as smooth rolling as possible. Plus if you are anal enough and the dust caps are push-in's, place/position the dust cap with the logo so it lines up with the body of the pedal.