Harken 3139 LOUPS - Manual (Page 2)

Attaching Loups ® to Blocks
WARNING! Block may break suddenly if attached incorrectly. Before attaching Loup you must understand block manufac-
turer's directed method of attachment. Some blocks are designed to secure Loup to head and others to attach Loup through
center of sheave or to protrusions coming out from center of sheave. Attaching Loups improperly may cause an accident.
Harken Black Magic ® Loop Block
Harken Grand Prix High-Load Snatch Block
WARNING! Attaching Loup to block head will
considerably weaken block so it can easily break
under load. Attach Loups only to thimble at
sheave center.
Attaching to Blocks or Hardware
Harken ® Straphead Block
Attach Loup to head only
if you are sure that it is a
Harken Straphead block.
Harken Straphead blocks
have two screws in head
(see photo at right).
Screws
WARNING! If Loups are stacked they will push outward
on block sideplates when load is applied, causing block
to break especially if crosspin is held using a cotter pin.
This can cause an accident. Make sure Loup can lie
side-by-side.
Thimble
Mouth
Make sure Loup will lie, side-
by-side between Loup and
sheave. Loups will settle and
flatten when load is applied.
If Loup is stacked (one strand
on top of the other) even a
small amount, line can push
outward and break sideplate.
WARNING! Attaching line to block head will consider-
ably weaken block so it can easily break under load.
Attach loop/lashing only through mouth of sheave.
Do not attach
to head
Do not attach
to head