I have a video showing disassembly, reassembly and startup of this stove here:
https://youtu.be/gKN_NKFscpA
Here’s a copy of an original Optimus 324 manual for this white gas fueled stove. Always use filtered white gas, naphtha, Coleman or Crown fuel or other camping stove appliance naphtha fuel. Never use diesel, kerosene or automotive gasoline.
Pick the format you like, or just download the PDF from the link at the bottom of the post.