Harken 7415.15S MKIV Hydraulic Jib Reefing & Furling - Manual (Page 24)

24 MKIV Hydraulic Unit 5
Commissioning Turnbuckle on Boat
Have extra cotter pins and locknuts on hand to replace used
ones at base of unit and for turnbuckle.
Hold foils and loosen foil clamp screws until you can pull clamp
out to lower foils.
Lower foils.
Remove six toggle housing screws. Use halyards to securely lift
and hold foils and lower unit.
Adjust turnbuckle
Replace used cotter pins and locknuts. Lower unit and install
clevis pin and new cotter pin.
Lift foils so top is 3" (75 mm) below upper terminal.
WARNING! Foils are heavy and can drop suddenly
on fingers. Only do this work at the dock, not
underway.
Raise lower unit and use
halyard to lift and hold it
about 5' (1.5 m). Raise foils
using second halyard and
secure. Allow room above
for turnbuckle take up.