Harken T2 User manual

INSTRUCTIONS
Strictly follow all instructions to avoid an accident, damage to your vessel, personal injury or
death. See www.harken.com for additional safety information.
Part
No. Description
Sheave
Ø
Max line
Ø
Maximum
working load
Breaking
load
in mm lb kg lb kg
2148 40 mm 40 mm
3
/ 8 10 485 220 1200 544
2151 57 mm 57 mm
7
/ 16 10 792 359 2380 1080
Replacement Loops
Part
No. Description
Sheave
Ø
Replacement
Loops /Lines
Replacement line
Ø
Loop
length Line
Typein mm in mm
2148 40 mm 40 mm 2154
1
/ 8 3 5
1
/ 2 140 Spectra
2151 57 mm 57 mm 2155
1
/ 8 3 6
1
/ 2 165 Spectra
Specifications
Planning Installation
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, damage to your vessel, personal injury or death. See www.
harken.com for additional safety information.
T2 Loop Blocks 2148, 2151
INCORRECTCORRECT
Rounded Sharp
Anchor Post
Head
Mouth
Sheave
Bail
Loop
USA –Tel: [phone] • Web: www.harken.com • Email: [email protected]
Italy –Tel: [phone] • Web: www.harken.it • Email: [email protected]
Sheave spins on ball bearings: low friction
No metal: inside or out.
Quick attachment: using loop.
Features Terms
Important information on choosing line, knots and splices. Go to US Sailing article:
http://offshore.ussailing.org/Assets/Offshore/SAS/PDF/Dyneema+Article.pdf

WARNING! Tying to head will cause block to break suddenly, possibly causing an accident,
damage to your vessel, personal injury or death. See www.harken.com for additional
safety information.
Always Loop to Anchor Post in Mouth of Block
Always loop to anchor post in the mouth of the block. The head is not strong enough to secure line.
CORRECT INCORRECT
Mouth
Head
Do Not Use Loop in Choker Style
Do not use the loop in the choker style as shown below.
WARNING! Using loop in a choker style greatly reduces the strength of the loop causing
the loop to break suddenly at high load, possibly causing an accident, damage to your
vessel, personal injury or death.
INCORRECT
Make sure spliced loop is long enough to prevent pinching and binding
sheave. Make loop longer than sheave diameter.
Make sure “X” is
greater than “Y”.
Using T2 Block as a Becket
X
Y

Inspect loop for chafe or UV-damage every time you sail.
Replace damaged loop immediately. Replace line with
no visible damage every two-years use.
Inspect Line Every Time You Sail
WARNING! Failure to inspect and replace UV-damaged, worn or frayed line can cause
the line to break suddenly, possibly causing an accident, damage to your vessel, personal
injury or death. See www.harken.com for additional safety information.
Use Harken supplied loops. Refer to specification chart. If you make your own loops refer to Using
Alternate Line Knots and Splices on last page.
Assembly
Remove one end of loop.
Tip: Use a small hooked tool or allen wrench to lift loop off the anchor post. Slip loop around bail.
Run loop into head at bottom of block and into mouth as shown.
Tip: use a tool to push loop into mouth.
Secure end of loop to Anchor Post. Pull on block to make sure loop is seated.

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. The following guidelines are offered to help make line choices. It is
your responsibility to choose the correct line for the block. If you are not comfortable choosing line, work
with a qualified rigger or use Harken-supplied Loops 2148 or 2151. When choosing line, use a breaking
load that is at least double the block’s breaking load to account for factors that degrade line strength.
Factors That Degrade Line Strength
Knots – Only 60% or less of the line breaking load.
Knots Using Spectra®or Dyneema®– Can slip at less than 20% of the breaking load. Use specialized
knots. Lock stitch tail to standing part.
Splicing by a Qualified rigger – Correctly using a “Bury” splice with lock stitching or a locked “Brummel”
can provide over 90% of the line’s breaking load. Other splices can have a much lower breaking load.
UV Degradation – UV rays can reduce line breaking load considerably. In high UV areas, lines can be only
60% of the original strength after five years.
Chafing – Chafing depends upon the amount and can only be controlled through careful installation
practices and constant inspection.
WARNING! Improper knots or splices can weaken the block installation causing it to break suddenly
at high loads, possibly causing an accident, damage to your vessel, personal injury or death.
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, possibly causing an accident, damage
to your vessel, personal injury or death.
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 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 discoloration
of part and is not covered under the Harken warranty.
Warranty
For additional safety, maintenance and warranty information see www.harken.com or the Harken®
catalog.
Maintenance
4369.W/02-17-11
Read important information on choosing line, knots and splices. Go to US Sailing article:
http://offshore.ussailing.org/Assets/Offshore/SAS/PDF/Dyneema+Article.pdf
Go to online manual at www.harken.com/manuals for link.
Part No. 2148 (40mm) 2151 (57mm)
Strands lbs kg lbs kg
4600 272 1190 540
Minmum Breaking Load for Line to Make Loop
Four (4)
Strands