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MKIV OCEAN - JIB REEFING & FURLING
Installation Manual - Intended for specialized personnel or expert users
Please read these instructions carefully before installing, servicing, or operating the equipment.
This manual may be modified without notice. See: www.harken.com/en/support/manuals/ for updated versions.
Unit 3
Preassembly
Commissioning
Operation
PLEASE SAVE THESE INSTRUCTIONS
5392 03/21
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Summary of Contents for Harken MKIV OCEAN Unit 3
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Page 1: Table Of Contents
Maintenance Clean/Inspect Replace Line Storage/Remove Furler Troubleshooting/Warranty Parts Lists 30-31 Contact Harken Please read these instructions carefully before installing, servicing, or operating the equipment. This manual may be modified without notice. See: www.harken.com/en/support/manuals/ for updated versions. PLEASE SAVE THESE INSTRUCTIONS... -
Page 2: Safety Precautions/Parts Descriptions
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/en/general-warnings-instructions/... -
Page 3: Sizing Check
WARNING! Do not drill boat's chainplate or toggle. This may result in rig failure. Use the correct size toggle and clevis pin. 2. Harken does not recommend drilling boat’s chainplate or toggle. In some cases bushings are available to fit boats with smaller clevis pin sizes. -
Page 4: Parts
HFG739 Red Loctite (for foil screws) 7513.30 Extra 7' (2.13 m) Foil ® 7513.31 Extra Connector with Bushings and Screws Blue Loctite (for feeder screws) ® MKIV Ocean Unit 3 Loctite is a trademark of Henkel AG & Company KGaA... -
Page 5: Rigging Parts Check/Tools
2. Mating turnbuckle components, with eye at lower end, must be purchased separately. 3. Headstay might require cutting and shortening to fit Harken toggle. . 4. Rod rigging requires Harken rod adapter stud. Jaw/jaw toggle w/ short link plate Unit Part No. -
Page 6: Dimensions/Sailmaker's Instructions
1" (25.4 mm Clevis pin Add 16 " 420 mm) Min 14 7/16" (373 mm) Max 8 15/16" (227 mm) 1 1/8" (28.6 mm) Clevis pin Add 16 " 420 mm) Min 7 1/8" (181 mm) MKIV Ocean Unit 3... -
Page 7: Toggle Deductions/Stay Into Foil Options
Preassembly Toggle Deductions/Stay Into Foil Options Use dimensions of Harken toggle below to build stay to correct length. Tip: Turnbuckles should be 1/2 to 2/3rds open to allow shortening for new wire stretch and for fine-tuning mast rake. Unit Clevis pin Ø... -
Page 8: Top Foil Length
Note: If long link plates of 7313.21 3/4 or 7313.21 7/8 are shortened, dimension must be changed or foil will be too short. Measure distance from crosspin down to where clevis pin attaches toggle to boat and use this dimension in G above. MKIV Ocean Unit 3... -
Page 9: Short Top Foil
Cut top trim cap to 4 1/2" (114 mm) as shown above. UNIT 3 Top foil length from worksheet: 1" - " (25 – 13 mm) Do not use short top foil. Use full length foil and clamp foil higher in drum assembly. MKIV Ocean Unit 3... -
Page 10: Confirm Foil Length
Confirm foil length by laying foils alongside stay with turn- buckle components. Pull stay out so it is straight. Attach Harken toggle to bot- tom of stay. Make sure toggle straps are straight. Adjust turnbuckle so that length of stay with Harken toggle will fit boat. - Page 11 9/16" (14.2 mm) from center of the sail groove. See dimensions below. 1" (25.4 mm) " (14.2 mm) 1 1/8" (28.5 mm) Drill two " (3 mm) holes in foil for self- tapping screws. MKIV Ocean Unit 3...
- Page 12 Use a small hammer to tap in place if necessary. Tip: With foil groove up, have screw holes on the upper half. Install self-tapping trim cap screws. MKIV Ocean Unit 3 STA-LOK is a registered trademark of STA-LOK Terminals Ltd.
- Page 13 Place connector on wire with hooked side Red Loctite in screw holes ® Hooked side of connector Use a hex key wrench to securely tighten screws. MKIV Ocean Unit 3 Loctite is a trademark of Henkel AG & Company KGaA...
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Page 14: Assembly Foils/Connectors
Red Loctite in screw holes ® Slide foil completely over bushings and connector. Use a hex key wrench to securely tighten screws. Continue assembly of foil system. MKIV Ocean Unit 3 Loctite is a trademark of Henkel AG & Company KGaA... -
Page 15: Halyard Swivel And Drum Assembly
Assembly Halyard Swivel/Drum Assembly Slide halyard swivel onto foil. IMPORTANT! Make sure up-arrow is up. Slide drum assembly onto foil. MKIV Ocean Unit 3... -
Page 16: Rod Rigging
Insert two cotter pins and spread. Clean excess Loctite ® from terminal body using special care to ensure that there is no red Loctite ® threaded stud. Loctite is a trademark of Henkel AG & Company KGaA MKIV Ocean Unit 3... -
Page 17: Turnbuckle/Toggle
Connect eye to toggle jaw using special clevis pin. Secure using cotter pin. Make sure shallow jaw is up. Down If stay length is set, use side cutters or needle-nose pliers to bend cotter pin to secure turnbuckle. MKIV Ocean Unit 3... - Page 18 Recess turnbuckle into drum assembly, slip link plates over special clevis pin, and secure using fasteners. Use blue Loctite adhesive on screws. ® Secure to toggle using lock nuts. Loctite is a registered trademark of Henkel AG & Company KGaA. MKIV Ocean Unit 3...
- Page 19 WARNING! Stay must attach to toggle. Do not attach stay to crosspin at drum assembly because crosspin and plates may fatigue and break. Stay attached to toggle MKIV Ocean Unit 3 Loctite is a trademark of Henkel AG & Company KGaA...
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Page 20: Final/Feeder
Use a drop of 833 Blue Loctite in screw holes. Use hex key ® wrench to secure. Blue Loctite in screw holes ® MKIV Ocean Unit 3 Loctite is a trademark of Henkel AG & Company KGaA... -
Page 21: Turnbuckle
Replace used cotter pins and locknuts. Lower drum assembly and install clevis pin and new cotter pin. Lift foils so top is 25 mm (1") below upper terminal. Stay turnbuckle Stay turnbuckle attached to attached to toggle toggle MKIV Ocean Unit 3... -
Page 22: Lead Line To Cockpit
Lead line to furling line cleat in cockpit. Furling Line Cleat 2670 Carbo Ratchet block Install so line is angled as shown. Note: As furling line lead changes, make sure line doesn’t chafe against line guard. Rotate line guard Stern if necessary. MKIV Ocean Unit 3... -
Page 23: Halyard Wrap/Prevent Halyard Wrap
Test furler at dock, but if water is smooth an incorrect lead angle may not be apparent. Halyard wraps usually occur in wave action when lead angle is not correct. The 8–10° angle shown at right is critical. MKIV Ocean Unit 3... -
Page 24: Pendant/Halyard Restrainer/ Halyard Tension
If your boat needs a Halyard Deflector, use Part No. 7304 or a Halyard Restrainer, use Harken Part No. 945. Restrainer should be mounted as high as possible on face of mast. Position restrainer so that foils will not hit it when under load. -
Page 25: Spinnaker Halyards/Headstay And Backstay Tension
They permit a very tight headstay to be eased when boat is not in use. For best performance, consider adding a backstay adjuster; either a block and tackle, a mechanical adjuster like those offered by Harken, or a hydraulic adjuster. Remember to keep headstay tight for best performance when furling or reefing. -
Page 26: Raise Sails
WARNING! Sail can become uncontrollable when raising in windy conditions, resulting in loss of footing. Choose wind conditions to match your experience and ability. If changing sails underway, take all safety precautions when working on the foredeck. See www.harken.com/manuals General Warnings and Instructions. -
Page 27: Secure Sail
Untie jib sheets and keep sail couple of wraps of line. completely rolled. Secure with Retie sheets. Add more wraps of line Turn spool to add a sail tie. on spool. couple of wraps of line. MKIV Ocean Unit 3... -
Page 28: Maintenance
Loosen Foil Clamp Before Slacking Backstay In order to prevent foils from locking against upper stay terminal when backstay is released, loosen foil clamp screws and lower foil before loosening backstay. MKIV Ocean Unit 3 STA-LOK is a registered trademark of STA-LOK Terminals Ltd. -
Page 29: Troubleshooting/Warranty
Line is not led through windows. Pull line through enclosed window. Line jams between guard and plastic spool plate. Warranty https://www.harken.com/en/worldwide-limited-professional-customer-warranty/ or call, write, email or fax Harken, Inc., Pewaukee, WI USA MKIV Ocean Unit 3... -
Page 30: Parts Lists
MKIV Ocean Unit 3 Parts List Description Order Part No. Hub Assembly HFG996 Clamp Screw H-84053 (M10 x 20 mm dogpoint SS) Cover with threaded insert H-84063 Flange half with threaded insert H-45413 Screws for flange and cover HFS1091 (M5 x 16 mm FH SHCS) Guard half H-45562.GREY... - Page 31 Remove Furler Troubleshoot Warranty Appendix 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 5 mm long HFG643 Hex keys 6 mm...
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Page 32: Contact Harken
Main Office and Harken Brandstore: Västmannagatan 81B SE-113 26 Stockholm Sweden Telephone: (46) 0303 61875 • Fax: (46) 0303 61876 Mailing address: Harken Sweden AB, Box 64, SE -440 30 Marstrand Web: harken.se • Email: harken@harken.se Harken UK, Ltd. Bearing House, Ampress Lane, Lymington, Hampshire S041 8LW, England Telephone: (44) 01590-689122 •...
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