Harken 7411.11 1/2 MKIV Jib Reefing & Furling - Manual (Page 27)

Loosen foil clamp screws at top of
drum assembly.
Slide drum assembly onto foils.
Tip: Face clamp downward so it
clears foil notches during installation.
Assembly Torque Tube Assembly
MKIV Underdeck Unit 1, 2, 3 27
Temporarily clamp torque tube assembly
to top of bottom foil, leaving feeder gap
partially exposed as shown at right. Gap
will be used to rig a foil system lifting line.