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.
Features - Sideplates pivot open to make them easy to load onto sheets, perfect for temporary leads,
line deflection, and static line functions requiring small adjustments. Loop carries primary load
and articulates for a fair lead. Captured Velcro®strap holds block securely closed when sideplates
are aligned. Strap has a 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. Integral headspacer prevents Hard Lube-anodized
aluminum sideplates from deflecting and binding.
Anchor point
Example - Line making 180°
wrap
General Warnings
WARNING! Work with a rigger when using alternate spliced loops or fastenings. Knots
or incorrect splices weaken block assembly considerably. Use only Harken-supplied
replacement loops, or work with a qualified rigging supplier when replacing loops.
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 38.5 1.5 11
7
/ 16
2300 5069 4600 10138
3300 5T HL 56 2.2 16
5
/ 8
5000 11020 10000 22040
3301 8T HL 75 3 18
3
/ 4
8000 17632 16000 35264
3302 12T HL 101 4 30 1
3
/ 16
12000 26448 24000 52896
3303 15T HL 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.
Loop Velcro
band
Closed slot
Terms
Velcro band
Head
Maximum working load - metric tons
Screw
Thimble
Alpha
cheek
Stop ball
Open slot
Beta
cheek
Specifications
HL Snatch blocks are supplied by Harken with loops. Loads listed above assume that the standard
Harken-supplied loops are used.

1. Unwrap the Velcro®band, leaving it secured
to the closed slots in the alpha cheek. One end
of the loop should be secured to the alpha cheek
thimble and pass under the Velcro band.
2. Remove the other end from the thimble on the
beta cheek.
Note wrap direction.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.
22
11
44
33
WARNING! Never attach load-bearing
lashings or loop to the head of the block.
This will drastically weaken block so
it will break under low load. Use only
Harken supplied loops or equivalent
secured to thimbles as directed.
Always Attach to Thimbles
Thimble
Head
Attaching Block to Anchor
Attaching Block (Continued)
3. Rotate the cheeks to load line on sheave. Close
cheeks making sure they align: there will be a
clicking sound as the locking ball seats. The 3303
block has a pull pin, not a locking ball.
4. Pass the loop around the anchor point and
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 loop and through the closed
slot. The wrap direction is counter-clockwise.
6655
88
77
88
Underside view ofUnderside view of
aboveabove
Velcro is a registered trademark of Velcro Industries B.V.I
Torlon is a registered trademark of Solvay Advanced Polymers L. L. C.
Locking
ball

Anchor Point Chafing or Cutting
Loops must attach to round bails such as those
on padeyes or pins. Sharp edges on many perfo-
rated 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
prevent damage
to loop.
Anchor point
Short-Term Maintenance
Flush block and attachments frequently with
detergent and fresh water. Clean bearings by
flushing areas shown while rotating sheave.
Long-Term Maintenance
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.
Replace worn stop ball
Inspect loop. Replace if there are signs of fatigue,
strand separation, wear, or if the colored tracer
fades from UV damage.
WARNING! Failure to inspect and correct
block loop and Velcro 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.
Disassemble block. Flush with detergent and
fresh water. See assembly on next page.
StrapStrap
Spin sheaveSpin sheave
Velcro is a registered trademark of Velcro Industries B.V.I
Torlon is a registered trademark of Solvay Advanced Polymers L. L. C.
Loctite is a registered trademark of Henkel AG & Company KGaA.

Printed in USA 5116 10/17
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.
For additional safety, maintenance, and warranty information; www.harken.com/manuals or the Harken catalog.
Warranty
General Maintenance
This discoloration is not serious and can be removed
with a fine abrasive. 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 Loop
3299 The 3299 block is riveted. Components are not replaceable, only loop. H-77983
3300 HFS1367 6X12 H-71376 H-71375 H-22888A AL-4110 * MP-126 1/4" (30) MS-518 H-77646 MP-117 H-77984
3301 HFS1365 8X16 H-72105 H-72102 H-46227 AL-4112 * MP-129 5/16" (34) MS-555 H-77318 MP-117 H-77985
3302 HFS1366 12X20 H-72167 H-72164 H-45007 AL-4114 * MP-127 3/8" (38) MS-549 H-77986 MP-117 H-77987
3303 HFS1368 12X25 H-72275 H-72274 H-49195 AL-4116 * MP-128 1/2" (34) MS-521 H-77988 ** H-77989
*Sheaves have pressed-in ULC composite sleeve bearings. Contact Harken
** Beta cheek in 3303 block uses spring loaded pinstop.
Assembly and Reorder Parts
3299 block is
riveted.
Components are
not replaceable.
Sheave with ULC
bearing and snap-fit
sideload balls
Mylar
washer
Socket head
cap screw
Raised tab must match notch
Alpha cheek
Raised tab
Mylar
®
washer
Alpha cheek assembly
Loop
Mylar
washer
Raised tab
Axle
Beta cheek in 3303
with pinstop
Thimble
cap
Thimble
Stop
ball
Mylar is a registered trademark of DuPont Teijin films US Limited Partnership
Velcro is a registered trademark of Velcro Industries B.V.I
Torlon is a registered trademark of Solvay Advanced Polymers L. L. C.
Beta cheek
Velcro®strap