L-320R
L-562A
151
Copyright © 2014 The Crosby Group LLC
All Rights Reserved
Rev. 3
CROSBY
®
L-562A & L-320R ROV HOOKS
Warning & Application Instructions
WARNING
• Loads may disengage from hook if proper
procedures are not followed.
• A falling load may cause serious injury or
death.
• Hook must always support the load. The load
must never be supported by the latch.
• Read and understand these instructions
before using hook and latch.
QUIC-CHECK
®
Hoist hooks incorporate
markings forged into the product which
address two (2)
QUIC-CHECK
®
features:
Deformation Indicators – Two
strategically placed marks, one just below the shank or eye
and the other on the hook tip, which allows for a
QUIC-CHECK
®
measurement to determine if the throat opening has changed,
thus indicating abuse or overload.
To check, use a measuring device (i.e., tape measure)
to measure the distance between the marks. The marks
should align to either an inch or half-inch increment on the
measuring device. If the measurement does not meet criteria,
the hook should be inspected further for possible damage.
Angle Indicators – Indicates the maximum included angle
which is allowed between two (2) sling legs in the hook.
These indicators also provide the opportunity to approximate
other included angles between two sling legs.
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 personnel in compliance with the schedule in
ANSI B30.10 and/or regulations governing your industry
or jurisdiction.
• For ROV hooks used in frequent load cycles or pulsating
loads, the ROV hook components (hoist hook, eye
bolt and hexagon body) and their threads should be
periodically inspected by Magnetic Particle or Dye
Penetrant (Disassembly will be required).
• Disassemble the eye bolt and shank hook from hexagon
body (sizes up to and including 31.5t WLL). This requires
removing the 2 spiral pins and unscrewing the eye bolt
and hoist hook.
• Always use new spiral pins when re-assembling the
ROV Hook.
• After reassembly, Crosby recommends a proof test equal
to 2 times the ROV hook’s stated WLL.
• Never use a hoist 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 hoist hook that is worn beyond the limits
shown in Figure 1.
• Remove from service any hoist hook with a crack, nick or
gouge. Hoist hooks with a nick or gouge shall be repaired
by grinding lengthwise, following the contour of the hook,
provided that the reduced dimension is within the limits
shown in Figure 1. Contact Crosby Engineering to evaluate
any cracks.
• Never repair, alter, rework, or reshape an ROV hook by
welding, heating, burning, or bending.
• Remove from service a hoist hook or eye bolt which has
threads corroded more than 20% of the hexagon body
engagement length.
• Never side load, back load, or tip load the hoist hook, eye
bolt or hexagon body. (Side loading, back loading and tip
loading are conditions that damage and reduce the capacity
ZONE A: REPAIR NOT REQUIRED
ZONE B: 10% OF ORIGINAL DIMENSIONS
ZONE C: 5% OF ORIGINAL DIMENSIONS
Figure 1
of the ROV hook). (See Figure 2.)
• The use of a latch may be mandatory by regulations or
safety codes. Follow the regulations governing your industry
or jurisdiction.
• 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 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.
• Remove from service any eye bolt with a crack, nick or
gouge. Eye bolt with a nick or gouge shall be repaired by
grinding lengthwise, following the contour of the eye bolt,
provided that the reduced dimension is no greater than
5% of original dimension. Contact Crosby Engineering to
evaluate any cracks.
Figure 2
SIDE LOAD
WRONG
i.e.,
Backhoe
Bucket
SIDE LOAD
WRONG
BACK LOAD
WRONG
TIP LOAD
WRONG