MKIV hydraulic unit 3
6
Preassembly
Rigging Parts Check/Tools/Adhesive
MKIV furlers are shipped with 3M 5200
adhesive. Use adhesives on dry connectors
and foils using the special injection system
described in the assembly section. Parts
may immediately be exposed to rain. Cure
is best at 70° F (22° C) with 50% humidity.
Do not apply at temperatures below 40° F
(5° C) and above 100° F (38° C).
Although adhesive has not cured, it will
remain in place on foil joints whether
they are left on the ground or raised up
on boat. Foils can be raised immediately
after assembly and sails fitted.
Note:
A small amount of adhesive may
bulge out of injection ports. If possible, let
system sit for several days before sailing.
If adhesive gets on sails, remove using
acetone. For faster-curing adhesive, pur-
chase 4200 Fast Cure adhesive sealant.
Note:
Damaged foils can be repaired.
Use a hand-held propane torch to heat
joints until foils can be pulled apart.
Adhesive alert
1. Long tape measure
6. Side cutters
11. Center punch
2. Short tape measure
7. Rat-tail file
12. Rigging or black tape
3. Power drill
8. Hex wrenches (provided)
13. Scissors
4. Drill bit – 5/32" (4 mm)
9. Slotted/Phillips screwdrivers 14. Metal straight edge
5. Hacksaw
10. Needle-nose pliers
15. Hammer
16. Metric ball-end hex wrenches (recommended but not required)
10
13
12
11
8
7
6
5
3
2
1
15
4
14
9
Toggle assembly
1. Harken toggle assembly or hydraulic cylinder required. Sold separately.
2. Mating turnbuckle components with eye at lower end must be purchased
separately. See page 10.
3. Headstay may require cutting and shortening to fit Harken toggle. Some
headstays may remain uncut by replacing lower stud of turnbuckle with
stud/eye, eliminating extra toggle.
4. Rod rigging requires Harken rod adapter stud.
Harken toggle
assembly housing
(sold separately)
Unit
Part no.
3H
7413.25 3/4
7413.25 7/8
16
Rod rigging
Harken rod adapter
stud required
(sold separately)
Unit
Part no.
3H
7426 -22
7427 -30
Hydraulic length-
adjusting cylinder
(sold separately)
Unit
Part no.
3H
7413.26 3/4
7413.26 7/8
WARNING! A stay that is old or damaged may break
suddenly, causing an accident. Headstay condition
should be checked by a professional rigger before reusing.
Hydraulic hoses and adapters
Hoses and adapters are not supplied with furler. See next page for
specifications.
Tools required