Using Alternate Line, Knots and Splices
Harken is not liable or responsible for use of line used to secure blocks. Go to Harken Limited Warranty
at www.harken.com for complete details. It is your responsibility to choose the correct line for the block.
When choosing line, use a breaking load that is at least double the block's breaking load to account for
strength loss from:
1. Knots slipping or breaking much lower than line breaking load. Spectra
require specialized knots.
2. Splices slipping or failing due to the incorrect type or execution.
3. UV damage increasing with each passing year.
4. Chafing seriously reducing strength.
If you are not comfortable choosing line, work with a qualified rigger or use Harken-supplied Loops 2148
or 2151. Go to www.harken.com/knots for additional information.
Minmum Breaking Load for Line to Make Loop
Four (4)
Strands
Part No.
2148 (40mm)
Strands
lbs
4
600
Read important information on choosing line, knots and splices at:
WARNING! Improper knots or splices can weaken the block installation causing it to break suddenly
at high loads, possibly causing an accident.
WARNING! Failure to account for loss of strength due to chafe or UV damage when choosing
line can result in line breaking suddenly at high loads.
Dyneema
®
is a registered trademark of DSM Dyneema
Spectra
®
is a registered trademark of Honeywell International, Inc.
Harken
equipment is designed for minimal maintenance. However, some upkeep is required to give
®
the best service and comply with the Harken
Keep your equipment clean and free-running by frequently flushing with fresh water. Periodically
clean with mild detergent and water solution. Spin sheaves to distribute soap solution evenly.
Flush with fresh water.
IMPoRTANT! Exposure to some teak cleaners and other caustic solutions can result in discolor-
ation of part and is not covered under the Harken warranty.
For additional safety, maintenance and warranty information see www.harken.com/manuals or the
Harken
®
catalog.
Additional Information
For additional information go to online manual 4371 at www.harken.com/manuals.
N15W24983 Bluemound Rd. • Pewaukee, WI 53072 USA
Tel: 262-691-3320, Fax: 262-701-5780 • Web: www.harken.com, Email: harken@harken.com
or Dyneema
-type lines
®
®
2151 (57mm)
kg
lbs
kg
272
1190
540
www.harken.com/knots.
Maintenance
limited warranty.
®
Warranty
Printed in USA
Strictly follow all instructions to avoid an accident, damage to your vessel, personal injury or
death. See www.harken.com/manuals for additional safety information.
Part
No.
Description
2148
40 mm
2151
57 mm
Part
No.
Description
2148
40 mm
2151
57 mm
Loop only to objects with rounded edges. Avoid sharp corners.
WARNING! Loop can cut easily on sharp corners causing loop to break suddenly under load,
possibly causing an accident.
4369 01-09-13
™
LOOP
Patent Pending
I N S T R U C T I o N S
Specifications
Max line
Ø
Sheave
Ø
in
mm
40 mm
/
10
3
8
57 mm
7
/
10
16
Replacement Loops
Replacement line
Ø
Sheave
Replacement
Ø
Loops / Lines
in
mm
40 mm
2154
/
3
1
8
57 mm
2155
/
3
1
8
Terms
Bail
Loop
Head
Anchor Post
Sheave
Planning Installation
CORRECT
INCORRECT
Rounded
Sharp
Maximum
Breaking
working load
load
lb
kg
lb
kg
485
220
1200
544
792
359
2380
1080
Loop
length
Line
in
mm
Type
5
/
140
Spectra
1
®
2
6
/
165
Spectra
®
1
2
Mouth
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