For any future mechanic attempting to service WECO pedals, the information presented in this thread is incorrect.

These WECO pedals can be serviced. To remove the dust cap, use a screwdriver as a wedge between the cap and pedal body, then tap gently with a hammer.
The pedal seems to have the same internals as pedals marked as WECO B803.

10 mm locknut - lock washer - 14(?)mm cone - caged bearing - pedal body - caged bearing - axle

I can't attach image on this post, but you can find it here, just replace (dot) with dot.
ibb (dot) co/sjqBp3v

Edit: If possible, please help by replying to this thread with the image attached to preserve it for the future.