I remember trying to figure that out too, back when I had them. Looks like you might need a special wrench from Malliard, but these were considered pretty cheap pedals and like other pedals of it's ilk, (Ofmega CXs come to mind,) they're pretty much throw away components after they wear out, because if you do get to remove things like bearing caps on them, they don't seem to stay put anymore afterwards, plus many of the parts are irreplacable because they are riveted or swaged in place permanently, so when they are worn out, the whole pedal is useless. Personally, I'd uprate to a classic MKS track type compact pedal instead, like my brother did back then. Those pedals were so well built and designed that he actually remounted them on his late 80's Cannondale when he got it back on the road a couple of years ago.
JMOs

Chombi
84 Peugeot PSV
85(?) Vitus Carbone 7 Plus