Harken TTR AirBlock User Manual
INSTRUCTION SHEET
TTR Blocks
Sheave
Telephone: (262) 691-3320 • Fax: (262) 691-3008 • Web: http://www.harken.com • E-mail: harken@harken.com
1251 East Wisconsin Avenue • Pewaukee, WI 53072 U.S.A.
WARNING!: Strictly follow all instructions to avoid an accident, damage to your vessel,
personal injury or death. See www.harken.com for additional safety information.
Parts
Head
Sheave
Cheek
Mouth
Rollers
Screw
w/Isolator
Cheek
Isolators
Inner
Race
Cage
Cheek
Balls
Part
No.
C9273
C8491
C8580
C8575
C9161
C8462
C8757
C8754
C8957
C8755
C8734
You Must Supply
Loop and/or High Strength Lashing Line
Screw
Sheave
Maximum Working Load
Ø
mm lb kg lb kg
60 6614 3000 13228 6000
75 11025 5000 22050 10000
75 11025 5000 22050 10000 2 x
100 14333 6500 28666 13000
100 14333 6500 28666 13000 2 x
125 17641 8000 35281 16000
125 17641 8000 35281 16000 2 x
150 22046 10000 44092 20000
155 22046 10000 44092 20000 2 x
175 26455 12000 52910 24000
200 33069 15000 66138 30000 1 26 H-45021 H-45022 H-45020 H-28556A H-45026 40 HBB7 104 HFS1033 H-46313
(MWL)
Breaking Load
(BL)
Max line Ø
in mm
3
/8 10
1
/2 12 H-45000 H45191 H-43677 H-21636B H-45195 22 HSB117 72 HFS917 H-46397
1
/2 2 x 12 H-45099 H-48447 H-48445 H-21636B H-48446 22 HSB117 72 HFS917 H-46397
5
/8 16 H-44999 H-44176 H-44174 H-21551B H-44175 23 HSB17 72 HFS757 H-46398
3
/4 2 x 20 H-47014 H-47222 H-47219 H-21551B H-46428 23 HSB17 72 HFS757 H-46398
11
/16 18 H-45131 H-43574 H-42648 H-22124B H-41540 25 HSB17 90 HFS757 H-46398
5
/8 2 x 16 H-45281 H-45287 H-45282 H-22124B H-41540 25 HSB17 90 HFS757 H-46398
13
/16 20 H-45247 H-45241 H-45242 H-22221C H45236 31 HBB7 76 HFS1033 —
7
/8 2 x 22 H-46250 H-48458 H-48456 H-22221C H-48457 31 HBB7 76 HFS1033 H-46313
7
/8 22 H-45238 H-45233 H-45235 H-23017C H-45236 36 HBB7 86 HFS1033 H-46313
A: H-48003
B: H-48004
Refer to chart below and choose loop and/or high strength lashing that
matches or exceeds break load (BL) of block. Note: See chart for
maximum line diameter that will fit through mouth.
WARNING: Knots weaken line considerably. Work with a qualified
rigger or line manufacturer on securing line. Use high strength
loops that match block's maximum working load or consult rigger
for recommendations on lashing. Using the wrong line or securing
line improperly can cause an accident, damage to your vessel,
personal injury or death.
Small Control Line
Use for lashing loop to head. Use small diameter line. Line length will vary
depending on block.
TTR Block Replacement Part Numbers
Rollers Balls
Cheek Sheave Inner Race Cage Order No. Order No. Fasteners Isolators
H-48005 H-48006 H-21636B H-43676 22 HSB16 68 HFS1119 —
Attach Block
WARNING: Attach loop/lashing only through mouth of sheave.
Attaching line to or through block head will considerably weaken
block so it can easily break under load causing an accident,
damage to your vessel, personal injury or death.
2. Secure stop knot by carefully
melting line ends with a hot knife.
CORRECT
WARNING: Do not attach loop using choker method shown below as
this will considerably weaken block so it can easily break under load
causing an accident, damage to vessel, personal injury or death.
INCORRECT
WARNING: If lashing comes loose, block can flip and cause line
to jam, resulting in loss of control. This can lead to an accident,
damage to your vessel, personal injury or death.
If lashing comes loose block
can flip so that sheet rides
off sheave.
Use as Becket/Fiddle Block
INCORRECT
CORRECT
Lash Block Head
1. Lash loop to head of block
with small control line using
square knot. Run line ends up
and behind lashing, then down
and under itself on each side
of knot. Pull tight to secure.
INCORRECT
TTRs can be set up as becket or fiddle blocks. Attach becket or secondary
block to anchor point. Lash to head and upper part of mouth as shown.
WARNING: Attaching becket or secondary block to primary block
will weaken block so it may break under load causing an accident,
damage to vessel, personal injury or death.
Anchor Point Chafing or Cutting
WARNING: Loops or lashings running over a sharp edge can cause
part to break under load causing an accident, damage to your
vessel, personal injury or death.
Loops must be attached to round bails such as those found on padeyes
or pins. Sharp edges on many perforated toerails will cut loop, severely
weakening it. When loop is attached to a plate, it must be at least 1/4"
thick and have rounded edges to keep loop from being damaged.
CORRECT INCORRECT
Round edges to prevent
damage to loop
Sharp edges will
damage loop
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