N15W24983 Bluemound Rd. • Pewaukee, WI 53072 USA
Tel: 262-691-3320, Fax: 262-701-5780 • Web: www.harken.com, Email: harken@harken.com
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.
Replacement Loops
Part
No.
Description
Sheave
Ø
Max line
Ø
Maximum
working load
Breaking
load
in
mm
lb
kg
lb
kg
2148
40 mm single
40 mm
3
/
8
10
485
220
1200
544
2151
57 mm single
57 mm
7
/
16
10
792
359
2380
1080
Specifications
Terms
Planning Installation
Loop only to objects with rounded edges. Avoid sharp corners.
WARNING! Loop can easily be cut on sharp corners causing it to break suddenly under
load, possibly causing an accident.
Using Alternate Line, Knots, and Splices
WARNING! Failure to account for loss of strength due to chafe or UV damage when choosing
line can result in line breaking suddenly when load is applied.
WARNING! Improper knots or splices can weaken the block installation causing it to break
suddenly when load is applied, possibly causing an accident.
Harken equipment is designed for minimal maintenance. However, some upkeep is required to give
the best service and comply with the Harken limited warranty.
Keep your equipment clean and free-running by frequently fl ushing 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.
Warranty
For additional safety, maintenance, and warranty information: www.harken.com/manuals or the
Harken catalog.
Maintenance
Printed
in
USA 4369 07-20
INCORRECT
CORRECT
Rounded
Sharp
Anchor post
Head
Mouth
Sheave
Bail
Loop
Read important information on choosing line, knots, and splices:
www.harken.com/knots.
Additional Information
For additional information go to online manual 4369 at www.harken.com/manuals.
Part No. 2148 (40 mm)
2151 (57 mm)
Strands
lb
kg
lb
kg
4
600
272
1190
540
Minimum breaking load for line to make loop
Four (4)
strands
Part
No.
Fits blocks
Loop
length
Line
type
Loop line
Ø
in
mm
in
mm
2154
2148
5 1/2
140
Spectra
1
/
8
3
2151
2148, 2151
6 1/2
165
Spectra
1
/
8
3
2179
2148, 2151
14 1/2
370
Spectra
1
/
8
3
I N S T R U C T I O N S
Patented
™
LOOP
Dyneema is a registered trademark of DSM Dyneema.
Spectra is a registered trademark of Honeywell International, Inc.
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 at a much lower load than line breaking load. Spectra
®
or Dyneema
®
-
type lines require specialized knots.
2. Splices slipping or failing due to 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.
Spin sheave
while
cleaning
