Harken 7320.10 User Manual

ESP JIB REEFING & FURLING

Unit 0, 1

Installation Manual – Intended for specialized personnel or expert users

Preassembly

Safety Precautions/Parts Descriptions 2 – 3
Specifications 3
Parts List 4 – 6
Tools 6
Top Foil 7 - 8
Toggle Deductions/Stay Into Foil 9
Confirm Foil Length 10
Cutting/Drilling Top Foil 11 - 12

Assembly

Foils/Connectors/Halyard Deflector 13 – 17
Halyard Swivel 17
Drum Assembly 17 – 18
Leg Kit with Toggle Assembly 19 – 21
Final 22

5002 05/14

Commissioning

Line to Cockpit/Line on Drum Assembly 23 – 24
Storm Sails 24
Raise Sail 25

Check Halyards 26

Operation

Check Halyards 27
Furl/Reef 28 – 29
Secure Sail 29
Adjust Turnbuckle 30

Maintenance

Clean/Inspect 31
Storage 31

Troubleshoot 32
Product Registration 32
Online Warranty/Product Registration 32
Appendix

Dimensions/Sailmaker's Instructions 33

Please read these instructions carefully before installing, servicing, or operating the equipment.

This manual may be modified without notice. See: www.harken.com/manuals for updated versions.

PLEASE SAVE THESE INSTRUCTIONS

Parts Description

Introduction

This manual gives technical information on installation and service. This information is destined exclusively
for specialized personnel or expert users. Installation, disassembling, and reassembling by personnel who are
not experts may cause serious damage to property or injury to users and those in the vicinity of the product.
If you do not understand an instruction contact Harken.

The user must have appropriate training in order to use this product.
Harken accepts no responsibility for damage or harm caused by not observing the safety requirements and

instructions in this manual. See limited warranty, general warnings, and instructions in www.harken.com/manuals.

Purpose

®

Harken

Jib Reefing and Furling is designed for rolling sails on sailboats to reduce sail size or to completely roll
so wind has little effect on the sail. Use of this product for other than normal sailboat applications is not covered
by the limited warranty.

Safety Precautions

WARNING! This symbol alerts you to potential hazards that may kill or hurt you and others
if you don't follow instructions. The message will tell you how to reduce the
chance of injury.

CAUTION! This symbol alerts you to potential hazards that may hurt you and others if
you do not follow instructions. The message will tell you how to reduce the
chance of injury.

WARNING! Strictly follow all instructions to avoid potential
hazards that may kill or hurt you and others. See www.harken.com/
manuals for general warnings and instructions.

11

10

9

8

9

7

3 4

3a

2

1

3c

6

5

13

12

13

8

3b

Parts Descriptions

1. Leg Kit with Toggle

2. Leg Kit Collar

3. Drum Assembly

a. Neck
b. Guard Posts
c. Spool

2 ESP Unit 0, 1

4. Adjuster Tube Clamp Screws

5. Bow Shackle

6. Adjuster Tube Bushings

7. Adjuster Tube

8. Foil Screws

9. Connector Bushings

10. Feeder

11. Foil (2 m)

12. Connector

13. Connector Wedge

14. Top Foil

15. Halyard Swivel

16. Trim Cap Screws

17. Trim Cap

a. Trim Cap Holes

Preassembly Specifications

16

15

Online Product Registration

17

www.harken.com/FurlingWarranty

5

5

14a

9

13

8

13

12

11

9

9

9

14

105/8"

(271 mm)

Upper measurement
point is to adjuster
tube bushing 6.

7321.22 Medium Leg Kit
Max Turnbuckle Length

1) Leg Kit with Toggle Assembly

b

b

a

a

c

d

c

i

e

d

f

h

g

j

k

Unit 0 Short and Long
Unit 1 Short, Medium, Long

Unit Part Numbers

Unit

0

1

Note: When using a turnbuckle you must use a Medium or Long Leg Kit assembly. *Check max turnbuckle length above.

ESP Unit 0, 1 3

Unit without

Lower Toggle

7320.10 7320.20 — 7320.21

7321.10 7321.20 7321.22* 7321.21

Leg Kit with Toggle

Assembly – Short

Leg Kit with Toggle

Assembly – Medium

g

h

l

Leg Kit with Toggle

Assembly – Long

e

f

Clevis Pin

Ø

5

/16", 3/8"

(8 mm, 9.5 mm)

7

/16", 1/2"

(11, 12.7 mm)

a. Leg Kit Collar Screw
b. Collar
c. Short, Medium or Long Leg
d. Lock Nut
e. Washers
f. Flat Hole in Plate
g. Cotter Pin
h. Spacer
i. Threaded Cross Pin
j. Clevis Pin
k. Jaw/Jaw Toggle
l. Cotter Pin

Wire

Ø

5

/32", 3/16",

(4, 5 mm)

7

/32", 1/4", 9/32", 5/16"

(6, 7, 8 mm)

Sizes

(4.37 mm)

-6, -8, -10

(5.03, 5.72, 6.35 mm)

Rod

-4

Parts List Drum Box

Leg Kit Relative Sizes

L

Short Medium Long

Halyard Swivel

Drum Assembly

Short Leg Kit

DO NOT USE with turnbuckle

Adjuster Tube

Clamp Screws

L

Medium or Long Leg Kit

Required for installation with turnbuckle

Bow Shackles

Drum Box

Description

Halyard swivel
Drum assembly
Bow shackles
Short leg kit with toggle
Medium leg kit with toggle
Long leg kit with toggle
Adjuster tube clamp screws
Blue Loctite

4 ESP Unit 0, 1

®

Part No. Size Length (L) Qty Part No. Size Length (L) Qty

H-58632 — — 1 H-55720 — — 1

7320.10BASE — — 1 7321.10BASE — — 1
2110 6 mm — 3 2110 6 mm — 3

7320.20
— — — 1 7321.22

7320.21

HFS1252 8 mm — 2 HFS1252 8 mm — 3

833 — — 1 833 — 1

Unit 0 Unit 1

5

/16", 3/8" 21/16" (52 mm) 1 7321.207/16", 1/2" 21/8" (53 mm) 1

5

/16", 3/8" 73/16" (183 mm) 1 7321.217/16", 1/2" 111/16" (280 mm) 1

7

/16", 1/2" 61/4" (159 mm) 1

Blue Loctite

®

Parts List Foil Set

Trim Cap

Trim Cap

Screws

Foil Screws

Plastic Connector

Wedges

Feeder

Red Loctite

Adjuster

Tube

®

2 m Foils

Connectors

Connector Bushings

Top Foil

Foil Set

Description

Included
Trim cap
Trim cap screws
Adjuster tube
Foils (2 m)
Top foil
Foil screws
Connectors
Connector bushings
Connector wedges
Feeder
Adjuster Tube Bushing
Red Loctite
Order Separately
Extra Foil (see page 7 - 8)
Extra Connector with bushings

ESP Unit 0, 1 5

®

7320.34.2000 1 7321.34.2000 1

MP-1894 10 MP-1894 14

MP-1975 2 MP-1976 2

Unit 0 Unit 1

Part Qty Part Qty

H-58490 2 H-55976 2
HFS1127 2 HFS1127 2

7320.33 1 7321.33 1

7320.30 4 7321.30 5

HFS384 23 HFS384 31
H-60148 4 H-59907 5
H-58466 10 H-55887 12

H-58461 1 H-55904 1

HFG739 2 HFG739 2

7320.30 1 7321.30 1

7320.31 1 7321.31 1

Adjuster Tube Bushing

Parts List Parts Sold Separately/Tools

Required parts sold separately by Harken:

• Extra foil and connector if required. See pages 7 - 8.

• Harken Short Leg Kit with toggle. Do not use with turnbuckle.

• Harken Medium or Long Leg Kit with toggle. Required for turnbuckle.

• Rod rigging requires Harken rod adapter stud.

• Furling line. To purchase elsewhere, figure length required:

WARNING! Wire that is old
or damaged may break sud­denly, causing an accident.
Headstay condition should
be checked by a professional
rigger before reusing.

Boat length + foot length of largest sail + 6' (1.8 m).

Optional parts, sold separately by Harken:

• Halyard Deflector. Use when halyard exits very close to stay attachment point.

• 7404 Lead Block Kit and one additional 7403 if necessary. Fits 1" (25 mm) stanchions.

Required Parts

Short Leg Kit with Toggle

Do not use with turnbuckle

Unit Part No.

0

7320.20

1

7321.20

Medium Leg Kit with Toggle

Required for turnbuckle

Clevis

Pin Part No.

5

/16, 3/

8

7

/16, 1/

2

7321.22

Long Leg Kit with Toggle

Required for turnbuckle

Clevis

Pin Part No.

— — 7320.21

7

/16, 1/

2

7321.21

Clevis

Pin

5

/16, 3/

7

/16, 1/

8

2

Optional Parts

Halyard Deflector
Unit Part No.

0

7301

1

7302

7404 Lead Block Kit

Includes 3 x 7403; 1 x 7401;

1 x 7402; 1 Horn Cleat

Rod Rigging: Harken Rod Adapter Stud Required

Thread

Rod Size

-4

4.37 mm 7/16" 7420 -4

-6

5.03 mm

-8

5.72 mm

-10

6.35 mm

Size UNF

7

/16" 7421 -6

1

/2" 7422 -8

1

/2" 7423 -10

Part

No.

Furling Line

Unit Part No. Line Ø Length (ft)

0

HFG594 7 mm 55

1

HFG233 7 mm 70

Preassembly Tools Required

1. Hex keys

Unit Size

0, 1

5 mm, 6 mm

2. Socket or open end wrench

Unit Size

0

1

10 mm

16 mm

3. Long tape measure 11. Phillips screwdriver

4. Short tape measure 12. Slotted screwdriver

5. Drill bit – 1/8" (3 mm) 13. Needle-nose pliers

6. Power drill 14. Locking Pliers

7. Hacksaw 15. Center punch

8. Side cutters 16. Hammer

9. Rat-tail file 17. Electric Tape (Use to Mark Foil)

10. Straight edge 18. Vise ( Tape Jaws to Protect Foil)

1

7

6

2

3

4

5

12

12

14

15

16

11

9

13

8

17

18

10

6 ESP Unit 0, 1

Preassembly Top Foil Length

UNIT 0

Measure A and add to this chart
and length chart below

Inches mm

A

B 1.0* 25*

E 24.0 609

F 4.1 104

G

Total A+B+E+F+G

*Add 1" (25 mm) if using a halyard deflector.

Tip: Check to see if the foil fits over
the marine eye. If yes, assemble foils
and lower unit following instructions.
Measure and cut the top foil after
other foils are assembled.

IMPORTANT! Identify top foil before
cutting. Use end with foil screw
holes for connector.

Make sure upper
measurement points
of A and pin-to-pin

Alternate

Measurement

Point

A

are the same.

TOP FOIL LENGTH WORKSHEET

1

2

3

4

To find “D” pick number from chart below that is closest to,
but not greater than total from step 3.

400 inches “D” = 393.7 inches 11,500 mm “D” = 10000 mm

5

Result (Pin-to-Pin – ABEFG)

Inches mm

3 X 78.74 = 236.2
4 X 78.74 = 315.2
5 x 78.74 = 393.7
6 x 78.74 = 472.4

Example–If result from Step 3 is:

Result (C) Top Foil Length

Pin-to-Pin Length

Subtract ABEFG

Subtract D

3 x 2000 = 6000
4 x 2000 = 8000
5 x 2000 = 10000
6 x 2000 = 12000

–

–

Pin

to

Pin

A

B

C

D

Length Check

After completing worksheet above fill in A, C, D, and G below. Add
“A” through “G” to confirm total equals your pin-to-pin measurement.

Length Chart

Dimensions Inches mm

A Center of Pin to Bottom of Terminal
B Bottom of Terminal to Top of Foil
C Top Foil Length ** **
D Number of Foils ________ x 78.74" (2000 mm)
E Adjuster Tube at Just Over Midpoint 24.0 609
F Drum Height 4.1 104
G Top of Leg Kit to Clevis Pin

1.0*

25*

Pin-to-Pin Length

*Add 1" (25 mm) if using a halyard deflector.
**If top foil length is 6.5" to 4" (165 to 100 mm) cut the foil at 6.75" (165 mm). If the top foil

is shorter than 4" (100 mm) do not use a cut top foil. A full length foil will be the top foil.

G Top of Leg Kit to Clevis Pin

Toggle

Part No.

7320.20 5/16 Short Leg Kit

7320.20 3/8 Short Leg Kit

7320.21 5/16 Long Leg Kit

7320.21 3/8 Long Leg Kit

ESP Unit 0 7

Type

Clevis Pin G Distance

in mm in mm

5

/

16

3

/

8

5

/

16

3

/

8

8 3.0 75

9.5 3.0 75
8 8.1 206

9.5 8.1 206

Pin

to

Pin

E

F

G

Preassembly Top Foil Length

UNIT 1

Measure A and add to this chart
and length chart below

Inches mm

A

B 1.1* 28*

E 23.6 600

F 4.9 124

G

Total A+B+E+F+G

*Add 1.1" (28 mm) if using a halyard deflector.

Tip: Check to see if the foil fits over
the marine eye. If yes, assemble foils
and lower unit following instructions.
Measure and cut the top foil after
other foils are assembled.

IMPORTANT! Identify top foil before
cutting. Use end with foil screw
holes for connector.

Make sure upper
measurement points
of A and pin-to-pin

Alternate

Measurement

Point

A

are the same.

TOP FOIL LENGTH WORKSHEET

1

2

3

Result (Pin-to-Pin – ABEFG)

4

To find “D” pick number from chart below that is closest to,
but not greater than total from step 3.

Inches mm

3 X 78.74 = 236.2
4 X 78.74 = 315.0
5 x 78.74 = 393.7
6 x 78.74 = 472.4
7 x 78.74 = 551.2
8 x 78.74 = 629.9

Example–If result from Step 3 is:

500 inches “D” = 472.44 inches 11500 mm “D” = 10000 mm

5

Result (C) Top Foil Length

Pin-to-Pin Length

Subtract ABEFG

Subtract D

3 x 2000 = 6000
4 x 2000 = 8000
5 x 2000 = 10000
6 x 2000 = 12000
7 x 2000 = 14000
8 x 2000 = 16000

–

–

Pin

to

Pin

A

B

C

D

Length Check

After completing worksheet above fill in A, C, D, and G below. Add
“A” through “G” to confirm total equals your pin-to-pin measurement.

Length Chart

Dimensions Inches mm

A Center of Pin to Bottom of Terminal
B Bottom of Terminal to Top of Foil 1.1* 28*
C Top Foil Length ** **
D Number of Foils ________ x 78.74" (2000 mm)
E Adjuster Tube at Just Over Midpoint 23.6 600
F Drum Height 4.9 124
G Top of Leg Kit to Clevis Pin

Pin-to-Pin Length

*Add 1.1" (28 mm) if using a halyard deflector.
**If top foil length is 7.75" to 5" (200 to 125 mm) cut the foil at 7.75" (200 mm). If the top foil
is shorter than 5" (125 mm) do not use a cut top foil. A full length foil will be the top foil.

G Top of Leg Kit to Clevis Pin

Toggle

Part No.

7321.20 7/16 Short Leg Kit

7321.20 1/2 Short Leg Kit

7321.22 7/16 Medium Leg Kit

7322.20 1/2 Medium Leg Kit

7321.21 7/16 Long Leg Kit

7321.21 1/2 Long Leg Kit

8 ESP Unit 1

Type

Clevis Pin G Distance

in mm in mm

7

/

16

1

/

2

7

/

16

1

/

2

7

/

16

1

/

2

11 3.7 93

12.7 3.7 93
11 7.4 188

12.7 7.6 193
11 12.3 313

12.7 12.3 313

Pin

to

Pin

E

F

G

Preassembly Toggle Deductions/Stay Into Foil Options

Rigger supplied: Eye at lower end of stay or turnbuckle to mate with toggle. Use dimensions of Harken toggle
below to build stay to correct length.

Tip: Turnbuckles should be one-half to two-thirds open to allow shortening for new wire stretch and for fine-tuning
mast rake.

Pin-to-Pin Length

Short Leg Kit

with Toggle

Pin-to-Pin Length

Medium or Long Leg Kit

with Toggle

Turnbuckle

with Marine Eye

Leg Kit Toggle

Assembly

Unit

Type Part No. in mm in mm

Short 7320.20 5/16

Long 7320.21 5/16

0

Short 7320.20 3/8

Long 7320.21 3/8

Short 7321.20 7/16

Long 7321.21 7/16

1

Short 7321.20 1/2

Long 7321.21 1/2

Clevis Pin ØPin-to-Pin (P-P)

Length

5

/

16

8 11/1627

3

/810 11/432

7

/16 11 17/1637Medium 7321.22 7/16

1

/213 15/842Medium 7321.22 1/2

Options for Snaking Stay into Foils

1. Swage Stud

2. Marine Eye

3. Wire for Mechanical Terminal

4. Harken Rod Adapter Nosepiece

WARNING! Using a threaded nosepiece with only adhesive at the upper rod eye terminal may result in
headstay system failure. Use Harken rod adapter stud. See www.harken.com/manuals for additional
safety information.

ESP Unit 0, 1 9

Preassembly Confirm Foil Length

Confirm foil length by laying foils alongside stay with turnbuckle components. Pull stay straight. Attach Harken
toggle to bottom of stay. Adjust turnbuckle, if used, so that length of stay with Harken toggle will fit boat. Ideally,
turnbuckle will be one-half to two-thirds open to allow for rig adjustment. Temporarily clamp short or long leg kit
to bottom of unit. Line up:

A. Bottom of full length foil with holes in adjuster tube. Set adjuster tube just above the mid-point of adjustment
range.

B. Holes at lower end of adjust tube with drum assembly holes.
C. Lower holes in leg kit line up with eye in toggle.

Full-Length Foil

Feeder

CBA

Adjuster Tube

Actual adjuster tube will have 12 to 14 adjuster holes. Line up the foil so it is just above the midpoint of adjustment.

Lay all foils out alongside stay and confirm that there will be enough space between the bottom of the marine eye
and the end of the top foil. If necessary, go to lower end, reposition the adjuster tube and lower full length foil
to another position. Confirm that there are two holes for the foil and one for the feeder.

Unit

0

1

Deflector No Deflector

in mm in mm

2 50 1 25

2.1 53 1.1 28

Tip: Check to see if the foil fits over the marine eye. If yes, assemble all foils and lower unit following
instructions. Measure and cut the top foil when all other foils are assembled.

10 ESP Unit 0, 1

Assembly Cutting/Drilling Top Foil

Determine top foil length using charts or by laying foils alongside wire. IMPORTANT! Confirm that you are using the
correct unit size worksheet. Be sure to lay foils, lower unit, and leg kit alongside stay to confirm length before cutting.

Use tape to mark foil. Cut foil to length.

Tool: hacksaw

Trim Cap Holes

Cut off this end with trim cap hole. Hole is

3

only used with full length 78

/4" (2000 mm)

foil as top foil.

Deburr inside edge using a file.

Tool: rat-tail file

Foil screw holes
for connector

Label top foil and identify which end will

Top Foil

be at the top when installed. You will be
drilling each side near the top.

Lay top foil alongside cutoff piece. Use
locking pliers to clamp foils together at
the interior flat surfaces opposite the
sail grooves.

Use a flat metal object (i.e. metal ruler) to
scribe lines on one side of foil. Leave foils
clamped for drilling.

Tools: straight edge, locking pliers

ESP Unit 0, 1 11