Unbolt wheel nuts first. Then remove axle and then remove wheel. By using adjustable spanner set unscrew the fork mounting nuts and bolts in the anti-clockwise direction, until it opens up. Check for any locking rings or seals. Remove them carefully. For each and every operation, check out carefully for future fitment of parts in the same way with same torque. Then separate the fork from its base before giving a solid wooden block support to bike from collapsing.