Harken 7413.15 MKIV Hydraulic Jib Reefing & Furling - Manual (Page 11)

MKIV Hydraulic Unit 3 11
Preassembly Short Top Foil
If top foil is shorter than 9 3 / 4 " (248 mm), use one of the following special techniques to ensure sufficient bearing
surface for the foil in the area of the halyard swivel.
3 1
/ 2
" (89 mm)
3" (76 mm)
2 1
/ 2
" (64 mm)
2" (51 mm)
1 1
/ 2
" (38 mm)
9 3 /
4
" (248 mm) No special treatment required.
9 3
/ 4
" (248 mm)
9 5 /
8
" – 7 1 /
8
" (244 – 181 mm) Do not use plastic
bushing above top connector.
9 5
/ 8
" – 7
1
/ 8
" (244 – 181 mm)
7" – 5 1 /
2
" (178 – 140 mm) Do not use plastic bushing
above top connector. Shorten top of connector and if
necessary shorten trim cap.
7" –
5
1
/ 2
" (178 –
140 mm)
5 3 /
8
" – 4" (137 – 102 mm) Do not use plastic bushing
above top connector. Cut connector right at cross formed
by glue dispersion channels. Use single foil screw in top
foil only.
5 3
/ 8
" – 4" (137 – 102 mm)
Under 1 1 /
2
" (38 mm) Eliminate top foil and run foil
higher in foil clamp.
Under 1
1
/ 2
" (38 mm)
Top Foil
Length from
Worksheet
1. Initial
top foil
cut length
2. Cut through
middle hole in
top foil.*
3. Shorten
full length
adjoining
foil by
cutting
through
middle
hole.*
4. Shorten
connector
5. Shorten
trim cap
Resulting Top
Foil Length Length
3 1 / 2 "
(89 mm)
6 9 / 16 "
(167 mm)
5"
(127 mm)
4 7 / 8 "
(124 mm)
No
3"
(76 mm)
6 1 / 16 "
(154 mm)
4 1 / 2 "
(114 mm)
4 7 / 8 "
(124 mm)
No
2 1 / 2 "
(64 mm)
6 9 / 16 "
(167 mm)
4"
(102 mm)
4 7 / 8 "
(124 mm)
No
2"
(51 mm)
5 1 / 16 "
(129 mm)
3 1 / 2 "
(89 mm)
4 3 / 8 "
(111 mm)
Yes
1 1 / 2 "
(38 mm)
4 9 / 16 "
(116 mm)
3"
(76 mm)
3 3 / 4 "
(95 mm)
Yes
3 1 /
2
" – 1 1 /
2
" (89 – 38 mm) Shorten top foil and adjoining
full length foil so two screws are used to assemble joint
instead of four. Do not use plastic bushings above top
connector.
*To allow for saw cut, position blade so upper half of
middle hole is preserved.
Cut-Offs – Do Not Use
Cut-Offs
Do Not Use
Cut-Offs
Do Not Use
Cut-Offs
Do Not Use
Cut-Off
Do Not Use