4024, 4036, and 4048 Conveyor Sheaves
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
8
REPRINTED WITH PERMISSION BY THE CROSBY GROUP
Crosby Hoist Hook
Warnings and Application Instructions
S-319
S-320
S-320N
S-322
Important Safety Information –
Read and Follow
A visual periodic inspection for cracks, nicks, wear, gouges
•
and deformation as part of a comprehensive documented
inspection program, should be conducted by trained per-
sonnel in compliance with the schedule in ANSI B30.10.
For hooks used in frequent load cycles or pulsating loads,
•
the hook and threads should be periodically inspected by
Magnetic Particle or Dye Penetrant. (Note: Some disassem-
bly may be required.)
Never use a hook whose throat opening has been
•
increased, or whose tip has been bent more than 10
degrees out of plane from the hook body, or is in any other
way distorted or bent.
Note: A latch will not work properly
on a hook with a bent or worn tip.
Never use a hook that is worn beyond the limits shown in
•
Figure 1.
Remove from service any hook with a crack, nick, or gouge.
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Hooks with a crack, nick, or gouge shall be repaired by
grinding lengthwise, following the contour of the hook, pro-
vided that the reduced dimension is within the limits shown
in Figure 1.
Never repair, alter, rework, or reshape a hook by welding,
•
heating, burning, or bending.
Never side load, back load, or tip load a hook.
•
(See Figure 2).
Eye hooks, shank hooks and swivel hooks are designed to
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be used with wire rope or chain. Efficiency of assembly may
be reduced when used with synthetic material.
Do not swivel the S-322 swivel hook while it is supporting a
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load.
The use of a latch may be mandatory by regulations
•
or safety codes; e.g., OSHA, MSHA, ANSI/ASME B30,
Insurance, etc. (Note: When using latches, see instructions
in “Understanding: The Crosby Group Warnings” for further
information.)
Always make sure the hook supports the load. (See Figure
•
3). The latch must never support the load (see Figure 4).
When placing two (2) sling legs in hook, make sure the angle
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from the vertical to the outermost leg is not greater than 45
degrees, and the included angle between the legs does not
exceed 90 degrees* (see Figure 5).
See ANSI/ASME B30.10 “Hooks” for additional information.
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For angles greater than 90 degrees, or more than two (2)
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legs, a master link or bolt type anchor shackle should be
used to attach the legs of the sling to the hook.
Loads may disengage from hook if proper pro cedures are
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not followed.
A falling load may cause serious injury or death.
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See OSHA Rule 1926.550(g) for personnel hoisting by
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cranes or derricks. A Crosby 319, 320, or 322 hook with
a PL Latch attached (when secured with the bolt, nut and
pin) may be used for lifting personnel. A Crosby S-320N
Hook with a S-4320 Latch attached (when secured with
cotter pin or bolt, nut and pin) may be used for lifting
personnel.
Threads may corrode and/or strip and drop the load.
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Hook must always support the load. The load must never
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be supported by the latch.
Never apply more force than the hook’s assigned Working
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Load Limit (WLL) rating.
Read and understand these instructions before using
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hook.
ZONE B
ZONE A
ZONE C
60°
45° 45°
2/3
ZONE B
ZONE A
ZONE C
60°
45° 45°
2/3
ZONE D
ZONE A: Repair not required
ZONE B: 10% of original dimension
ZONE C: 5% of original dimension
ZONE D: See minimum thread size chart
Figure 1
Side Load
Back Load
Wrong
Tip Load
Figure 2
45°
45°
Right
Wrong
Figure 3 Figure 4 Figure 5
