MKIV hydraulic unit 3
3
Preassembly
Sizing Check
11
12
13
14
15
16
17
3. Will lower unit fit on bow? See page 9. If necessary, use an additional toggle to slightly raise unit.
Sizing check
1. Check headstay and clevis pin dimensions in chart below.
2. Harken does not recommend drilling boat’s chainplate or toggle. Bushings may be required to fit boats with
smaller clevis pin sizes.
UNIT 3
Unit
part no.
Description
Wire Ø
7413.15
MKIV hydraulic unit 3 (aluminum foils)
Note: Black foils standard. Silver foils available.
7
/
16
",
1
/
2
"
11 mm, 12 mm
Rod Ø
7413.16
MKIV hydraulic unit 3 (carbon foils)
-22, -30
9.53 mm, 11.10 mm
Toggle part no.
Description
Toggle clevis Ø
7413.25 3/4
Toggle assembly
3
/
4
"
19.1 mm
7413.25 7/8
Toggle assembly
7
/
8
"
22.2 mm
7413.26 3/4
Hydraulic cylinder/toggle
3
/
4
"
19.1 mm
7413.26 7/8
Hydraulic cylinder/toggle
7
/
8
"
22.2 mm
18
19
D
G
E
F
B
A
C
H
See page 39 for all
toggle dimensions
WARNING! Do not drill boat's chainplate or toggle. This may result in rig failure.
Use the correct size toggle and clevis pin.
This manual shows both black and clear foils.
In April 2021 MKIV furlers began shipping with
black foils. Clear anodized foils also available.
