Harken C10245 User Manual

INSTRUCTIONS

2

Blocks

TTR

Sheave

Thompson

tunnel

Telephone: [phone] • Fax: [phone] • Web: harken.com • E-mail: [e-mail]

N15W24983 Bluemound Road • 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/manuals for additional safety information.

= Incorrect. Avoid to prevent accidents.

Parts

Head

Cheek A

Thrust bearing

Sheave

Cheek

Mouth

Mouth

Screw

Cage

Rollers

Inner

race

Part

No.
C10245
C10125
C10226
C10150
C10151
C10193
C10194

Thrust bearing

Cheek B

You Must Supply

1. Loop and/or high strength lashing line

Screw

Sheave

Max. line

Ø

(mm)

(mm)

56 10 19 3000 H-55410 H-55409 H-55411 H-55419 2 H-55412 H-21636B H-43676 22 HFS1234 M4X.7X12 SK FH
62 14 20 5000 H-54733 H-54328 H-55094 H-54329 2 H-54324 H-21636B H-45195 22 HFS1228 M4X0.7X20 SK FH
67 14 x 2 20 5000 H-55138 H-55139 H-55140 H-54329 2 H-55137 H-21636B H-48446 22 H-55141 M4X0.7X25 SK FH
82 16 26 6500 H-54773 H-54774 H-54775 H-54776 2 H-54772 H-21551B H-44175 23 HFS1239 M5X.8X20 SK FH

87 16 x 2 26 6500 H-54963 H-54964 H-54966 H-54776 2 H-54965 H-21551B H-46428 23 HFS1225 M5X.8X30 SK FH
104 20 38 8000 H-55008 H-55007 H-55005 H-55006 2 H-55004 H-22124B H-41540 25 HFS1114 M6X1.0X25 SK FH
110 20 x 2 38 8000 H-55112 H-55113 H-55111 H-55006 2 H-55110 H-22124B H-45026 25 HFS1223 M6X1.0X35 SK FH

Ø

Mouth

Ø

mm

Maximum

working load

(MWL) kg

Cheek A Cheek B Sheave

Harken is not liable or responsible for choosing line used to secure
blocks. Go to Harken Limited Warranty at www.harken.com/manuals
for complete details.

Refer to the “Specifications Chart” below and use a loop/lashing with
a maximum working load that meets or exceeds the maximum working
load listed. If working with breaking loads, use a breaking load that is
four times the maximum working load listed.

Important information on choosing line, knots and splices:
See www.Harken.com/knots.

WARNING! Knots weaken line considerably. Work with a qualified
rigger or line manufacturer on securing line. Use high strength
loops carefully chosen using the instructions in “1” above or
consult rigger for recommendations on lashing.

2. Secondary lashing line

Use for securing loop or lashing to head. Use small diameter line.
Line length will vary depending on block.

TTR2 Replacement Part Numbers

Thrust bearing

Inner Race Cage

Rollers

Fastener Fastener descriptionOrder Qty Order Qty

Attach Block

Slip loop through mouth, to make four holding strands.

WARNING! If secondary lashing at head comes loose, block can
flip and cause line to jam, resulting in loss of control. Inspect
lashing often and redo if necessary.

WARNING! Attaching line to or through block head will
considerably weaken block so it can easily break under load.
Attach loop/lashing only through mouth of sheave.

Mouth

WARNING! Using a loop in a choker style weakens the loop

connection. Do not use choker style connection.

Choker

If secondary lashing at
head comes loose block
can flip so that sheet
rides off sheave.

Use as Becket/Fiddle Block

Anchor point

Secondary Lashing to Head

1. Wrap small line around both sides of loop/lashing by passing through
Thompson tunnel. Use a secure knot such as a Carrick bend or use square
knot and run tails up and behind wrap, then down, and under itself on
each side of knot. Pull tight to secure. See www.harken.com/knots.

2. Tie overhand stop knots and
work them close to tail loop.
Use a hot knife to heat end to
“mushroom shape” and secure
to stop knot.

TTR2s can be set up as becket or fiddle blocks. Attach becket or secondary
block to anchor point. Lash to head and mouth as shown.

WARNING! Attaching becket or secondary block to primary
block will weaken block so it may break under load. Attach
to anchor point.

Anchor Point Chafing or Cutting

WARNING! Loops or lashings running over a sharp edge can cause
part to break under load. Attach to fitting with a rounded edge.

Loops must attach 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
(6 mm) thick and have rounded edges to keep loop from being damaged.

Round edges to prevent

damage to loop.

Anchor point

1

/4"

Sharp edges will

damage loop.