MKIV hydraulic unit 3
11
Preassembly
Short Top Foil
If top foil is shorter than 248 mm (9
3
/
4
") , use one of the following techniques to ensure sufficient bearing
surface for the foil in the area of the halyard swivel.
89 mm (3
1
/
2
")
76 mm (3")
64 mm (2
1
/
2
")
51 mm (2")
38 mm (1
1
/
2
" )
248 mm (9
3
/
4
") No special treatment required.
248 mm (9
3
/
4
")
244 – 181 mm (9
5
/
8
" – 7
1
/
8
") Do not use plastic
bushing above top connector.
244 – 181 mm (9
5
/
8
" – 7
1
/
8
")
178 – 140 mm (7" – 5
1
/
2
") Do not use plastic bushing
above top connector. Shorten top of connector and if
necessary shorten trim cap.
(178 –
140 mm (7" –
5
1
/
2
")
137 – 102 mm (5
3
/
8
" – 4") Do not use plastic bushing
above top connector. Cut connector right at cross formed
by glue dispersion channels. Use single (1) foil screw in
top foil only.
137 – 102 mm (5
3
/
8
" – 4")
Under 38 mm (1
1
/
2
") eliminate top foil and run foil
higher in foil clamp.
Under 38 mm (1
1
/
2
")
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
89 – 38 mm (3
1
/
2
" – 1
1
/
2
") Shorten top foil and adjoining
full length foil so two (2) screws are used to assemble
joint instead of four (4). 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
