Harken 3299 User manual

INSTRUCTIONS
High-Load Snatch Blocks
N15W24983 Bluemound Road •Pewaukee, WI 53072 U.S.A.
Telephone: [phone] •Fax: [phone] •Web: harken.com •E-mail: [email protected]
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.
High-load snatch blocks have sideplates that pivot open to make them easy to load onto sheets. They are perfect for temporary leads, line deflection, and static
line functions requiring small adjustments. A fixed loop soft attach carries the block’s primary load and articulates for a fair lead. The captured Velcro®strap
holds the block securely closed when sideplates are aligned. The strap has a broad reflective tab for easier operation with gloves.
Harken composite bearing technology (ULC) ensures sheaves turn smoothly and maintain efficiency under extreme loading. Snap-fit Torlon® bearings carry
sideloads. An integral headspacer prevents Hard Lube-anodized aluminum sideplates from deflecting and binding. The wide sheave allows a range of line
diameters.
Anchor point
Example - Line making 180°wrap
General Warnings
HL Snatch blocks are supplied by Harken with strops. Loads listed above assume that the standard Harken supplied strops are used.
WARNING! Work with a rigger when using alternate spliced strops or fastenings. Knots or incorrect splices weaken strops
considerably. Use only Harken-supplied replacement strops, or work with a qualified rigging supplier when replacing strops.
Specifications
Part No.
Sheave diameter Max line Ø Maximum working load Breaking load
Description mm in mm in kg lb kg lb
3299 2.3T HL Snatch block 38.5 1.5 11
7
/ 16 2300 5069 4600 10138
3300 5T HL Snatch block 56 2.2 16
5
/ 8 5000 11020 10000 22040
3301 8T HL Snatch block 75 3 18
3
/ 4 8000 17632 16000 35264
3302 12T HL Snatch block 101 4 30 1
3
/ 16 12000 26448 24000 52896
3303 15T HL Snatch block 125 5 30 1
3
/ 16 15000 33060 30000 66120
Velcro is a registered trademark of Velcro Industries B.V.I
Torlon is a registered trademark of Solvay Advanced Polymers L. L. C.
Warning! Block loads increase when the line turns at a greater angle. Block loads double when the line turns 180 degrees.
See example above. Use block loading factors. Select blocks and application carefully.
Strop
Velcro
band
Closed slot
Terms
Velcro band
Head
Maximum working load - metric tons
Screw
Thimble
Beta
cheek
Alpha
cheek
Open
slot
Strop
ball
Large strop
eye

Attaching Block
1. Unwrap the Velcro band, leaving it secured to the closed
slots in the alpha cheek.
2. Remove the larger strop eye from the thimble on the beta
cheek by sweeping your fingers toward the eye between strop
and beta cheek.
3. Rotate the cheeks to load line on sheave. Close cheeks
making sure they align, there is an audible clicking sound as
the locking ball seats. The 3303 block 15T has a pull pin, not
a Torlon ball.
4. Pass the strop around the anchor point and slip the strop’s
large eye over the beta cheek’s thimble.
5. Rewrap the Velcro band. Make sure the Velcro band
always starts with the sewn deadend passing over the strop
and through the closed slot. The wrap direction is counter-
clockwise.
Note wrap direction.
6. Pull the Velcro band tightly as you wrap. Note: there is no
need to pass the Velcro band through the closed slot on the
band's second pass. Make sure the band is securely seated
in the open slots on the beta cheek. Press band in place to
secure Velcro, and tuck the reflective band into open slots.
21
43
6 5
8
7

Inspect Parts Every Time You Sail
WARNING! Failure to inspect and correct block, strop
and Velcro, and stop or lashing can result in block
breaking below rated load. Inspect parts each time you
sail. If parts are under load during long passages, it is
important to inspect them carefully while underway. If
in doubt, replace.
Inspect strop. Replace if there are signs of fatigue, strand
separation, wear, or if the colored tracer fades from UV
damage.
WARNING! Make sure Velcro band is correctly wrapped
and has good holding properties. If the
band does not hold, the sheet can catch the open slots
when sail is flogging and accidentally open.
Always check the Velcro band to make sure it is secure.
Replace the band if it loses holding ability. Check and replace
stop ball if it becomes worn.
WARNING! Never attach load-bearing lashings, loop, or
strop to the head of the block. This will drastically weaken
block so it will break under low load. Use only Harken
supplied strops or equivalent secured
to thimbles.
Never Secure to Head
Replace worn stop ball
Head
Thimble
Correct Incorrect
Anchor Point Chafing or Cutting
Loops must attach to round bails such as those 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 thick enough and have rounded edges to keep loop
from being damaged.
WARNING! Loops or lashings running over a sharp edge
can cause part to break under load. Attach to fitting with a
rounded edge.
Inspect screws to
make sure they are
tight. If loose, remove
and use threadlocker
to secure.
Inspect Parts Every Time You Sail
WARNING! Inspect fasteners to make sure they are tight
and secure with blue Loctite® adhesive or equivalent.
Sharp edges
damage loop.
Round edges pre-
vent damage to loop.
Anchor point
Short-Term Maintenance
Flush block and attach-
ments frequently with
detergent and fresh
water. Clean bearings
by flushing areas
shown while rotating
sheave.
Disassemble block.
Flush with detergent
and fresh water. See
assembly on next
page.
Long-Term Maintenance

Printed in USA 5116 6/16
Harken equipment requires minimal maintenance, but some is
required to give the best service and to comply with Harken's
limited warranty.
It is important to keep equipment clean by frequently flushing with
fresh water. In corrosive atmospheres, stainless parts can show
discoloration around holes, rivets, and screws. This is not serious
and can be removed with a fine abrasive.
For additional safety, maintenance, and warranty information; www.harken.com/manuals or the Harken catalog.
Warranty
General Maintenance
Flush blocks thoroughly with fresh water. Periodically, disassemble
the blocks and clean with detergent and 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.
Replacement part numbers
Block
Fastener
FHCS (2) Size (mm)
Thimble
cap (2)
Thimble
(2)
Mylar
washer (3)
Beta
cheek
Sheave
with ULC
bearing
Torlon
Balls Size (Qty) Axle
Alpha
cheek with
band
Stop
ball Strop
3300 HFS1367 6X12 H-71376 H-71375 H-22888A AL-4092 * MP-126 1/4" (30) MS-518 H-72108 MP-117 H-70938
3301 HFS1365 8X16 H-72105 H-72102 H-46227 AL-4089 * MP-129 5/16" (34) MS-519 H-72115 MP-117 H-72106
3302 HFS1366 12X20 H-72167 H-72164 H-45007 AL-4088 * MP-127 3/8" (38) MS-520†H-72171 MP-117 H-72168
3303 HFS1368 12X25 H-72275 H-72274 H-49195 AL-4086 * MP-128 1/2" (34) MS-521 H-72270 ** H-72276
*Sheaves have pressed-in ULC composite sleeve bearings. Contact Harken
** Beta cheek in 3303 block uses spring loaded pinstop.
† Titanium plates available, order MS-549
Mylar is a registered trademark of DuPont Teijin films US Limited Partnership
Reorder Parts
3299 block is riveted.
Components are not
replaceable.
Sheave with ULC
bearing and snap-fit
sideload balls
Mylar
washer
Small strop eye
Socket head
cap screw
Raised tab must match notch
Alpha cheek
Raised Tab
Mylar®
washer
Alpha cheek assembly
Stop
ball
Strop
Large strop eye
Mylar
washer
Raised tab
Axle
Beta cheek in 3303
Notch
Thimble
cap
Thimble