Harken 7410.10 MKIV Jib Reefing & Furling - Manual (Page 31)

MKIV Unit 0 31
Clean and lubricate
Keep unit clean. When you wash boat, flush unit with
soap and fresh water. Occasionally lower sail and flush
halyard swivel with soap and fresh water.
At least twice a year unit should be cleaned more
thoroughly by removing line (first note direction of
spool) and flushing bearings with soap and fresh water.
After unit has dried, apply a dry spray lubricant such as
McLube ® .
Foils may be cleaned by washing with soap and water.
A scrap of luff tape may be run up foil to scrub inside
grooves.If lubrication is required, spray a thin coat of
McLube ® SailKote on sail luff tapes away from boat deck.
Inspect
Inspect unit for signs of chafe, wear, or damage.
Inspect clevis and cotter pins below and inside drum assembly for
signs of loosening. Check headstay tension for signs of loosening.
Inspect swage fitting and lower toggle for signs of stress
corrosion.
Inspect Norseman or Sta-Lok terminal or rod terminal for
signs of loosening.
Inspect all screws on unit to be sure they have not loosened.
Inspect foil to make sure that it has not dropped into drum
assembly. Periodically inspect wire for signs of wear or unraveling.
Replace line
Use Harken HFG594 furling line or source a good-quality, double-braid polyester line with good wear characteristics.
Use 9 /
32
" (7 mm) line with break strength exceeding 2500 lbs (1130 kg). Smaller boats or smaller sails may allow
5 /
16
" (8 mm) line. If a larger-diameter line is desired, consult with a rigger about using tapered line with a high
strength core and cover removed in forward part of line.
Storage – Mast Down
In areas where it freezes, do not store system where water can accumulate in foils. When water freezes it will rupture
aluminum. Store foils under cover, with grooves facing down or on an angle so water will run out.
Storage/Transporting
Do not store or transport system with drum assembly extending beyond mast. Remove masthead clevis pin and shift
furler up so drum assembly can be strapped securely to mast. Some people remove drum assembly and halyard swivel
for storage and transport.
After Storage or Transport
After storing or transporting unit, clean thoroughly including ball bearings. See instructions above.
loosen foil Clamp before Slacking backstay
In order to prevent foils from locking against upper stay terminal when backstay is released, loosen foil clamp screws and
lower foil before loosening backstay.
Maintenance Clean/Inspect/Remove furler
WARNING! Periodically inspect items listed
below and any others as necessary. Failure
to inspect can cause an accident.
WARNING! Do not spray foil on boat. McLube ®
will cause slippery decks which may result in
loss of footing, falling overboard.