Crosby Group Mckissick Hoist Hooks Instructions

Mckissick Hoist Hooks
Instructions Manual

WARNINGS & APPLICATION INSTRUCTIONS

WARNING

• Loads may disengage from hook if proper procedures are not followed.
• A falling load may cause serious injury or death.
• See OSHA Rule 1926.1431(g)(1)(i)(A) and 1926.1501(g)(4)(iv) (B) for personnel hoisting by cranes and derricks, and OSHA Directive CPL 2-1.36 – Interim Inspection  Procedures During Communication Tower Construction Activities. A Crosby 319, L-320 or L-322 hook with a PL latch attached and secured with a bolt, nut and cotter  pin (or toggle pin) may be used for lifting personnel. A Crosby 319N, L-320N or L-322N hook with an S-4320 latch attached and secured with cotter pin or bolt, nut and pin; or a PL-N latch attached and secured with toggle pin may be used for lifting personnel. A hook with a Crosby SS-4055 latch attached shall NOT be used for  personnel lifting.
• See OSHA Directive CPL 2-1.36 – Crosby does not recommend the placement of lanyards directly into the positive locking Crosby hook when hoisting personnel. Crosby requires that all suspension systems (vertical lifelines / lanyard) shall be gathered at the positive locked load hook by use of a master link, or a bolt-type shackle secured with cotter pin.
• Threads or Split-Nut may corrode and/or strip and drop the load.
• Remove securement nut to inspect or to replace S-322 and S-3319 bearing washers (2).
• Hook must always support the load. The load must never be supported by the latch.
• Never apply more force than the hook’s assigned Working Load Limit (WLL) rating.
• Read and understand these instructions before using hook.

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 & 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 ASME 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  disassembly 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.
• Any crack in a hook is reason to take it out of service. Hooks with a nick or gouge can be repaired only by a qualified person 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 crack.
• Remove from service any hook which has threads corroded more than 20% of the nut engagement length.
• Never repair, alter, rework, or reshape a hook by welding, heating, burning, or bending.
• Never side load, back load, or tip load a hook.(Side loading, back loading and tip loading are conditions that damage and reduce the capacity of the hook.) (See Figure 2)
• Eye hooks, shank hooks and swivel hooks are designed to be used with wire rope or chain. Efficiency of assembly may be reduced when used with synthetic material.
• Do not swivel the L-322 or S-3319 swivel hooks while supporting a load. These hooks are distinguishable by hex nuts and flat washers.
• The L-3322 swivel hook is designed to rotate under load. The L-3322 is distinguishable from the L-322 by use of a round nut designed to shield bearing.
• The frequency of bearing lubrication on the L-3322 depends upon frequency and period of product use as well as environmental conditions, which are contingent upon  the user’s good judgment.
• The use of a latch may be mandatory by regulations or safety codes; e.g., OSHA, MSHA, 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 multileg slings are placed in the base (bowl/saddle) of the hook, the maximum included angle between sling legs shall be 90 deg. The maximum sling leg angle with  respect to the hook centerline for any rigging arrangement shall be 45 degrees. A collector ring, such as a link or shackle, should be used to maintain in-line load  when more than two legs are placed in a hook or for angles greater than 45 degrees with respect to hook centerline. When more than two legs are placed in the hook  bunching of the legs shall be avoided.
• Reference Crosby’s Hoist Hook Warning and Application Information for basic machining and minimum thread size.
• See ASME B30.10 “Hooks” for additional information.

This application/warning information apply to Crosby products only.

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