This manual has been prepared to provide information and suggestions for safe operation, rigging, inspection, and
maintenance of Crane Scales.
It is not intended that the suggestions in this manual take precedence over existing plant safety rules and
regulations, OSHA regulations, or instructions issued by the crane manufacturer. However, a thorough study of the
following information should provide a better understanding of operation and afford a greater margin of safety for
personnel and machinery.
It must be recognized that this is a manual of suggestions for the crane scale operator’s use. It is the responsibility
of the owner to make personnel aware of all federal, state and local rules and codes and to make certain that
operators are properly trained.
Guidelines
SAFE OPERATING GUIDELINES
Before operating a crane scale, the scale operator should carefully read and study the appropriate Operation
Manual supplied and note any special instructions.
Operating suggestions
1. Do not make lifts beyond rated load capacity of the crane scale, sling chains, rope slings, etc.
2. Do not operate the crane scale if ropes, slings, cables, chains, etc. show any sign of defects or excessive wear.
3. Before moving the load, make certain that load slings, load chains or other lifting devices are fully seated in the
saddle of the crane scale hook with hook latch closed.
4. At no time should a load be left suspended from the crane scale unless the operator is at the master switch or
push buttons with the power on; and under this condition keep the load as close to the floor as possible to
minimize the possibility of an injury, should the load drop. When the crane scale is holding a load, the crane
operator should remain at the master switch or push buttons.
5. When a hitcher is used, it should be the joint responsibility of the crane operator and the hitcher to see that
hitches are secure and that all loose material has been removed from the load before starting a lift.
6. Do not lift loads with ropes, slings, cables, chains, etc. hanging loose.
7. All ropes, slings, cables, chains, etc. should be removed from the crane scale when not in use. (A dangling
cable can inadvertently snag other objects when the crane is moving.)
8. Operators should not maneuver a loaded crane scale over personnel.
Handling hoist motion
After the crane scale hook has been positioned over the load, lower it until the load can be attached to the scale
hook. As the scale hook approaches this level, reduce the speed so that the lowering can be stopped smoothly and
quickly.
If load slings are used to handle the load, the slings should be fully seated in the saddle of the scale hook. With the
scale hook latch closed, the scale hook should be started upward slowly until all slack has been taken out of the
slings. Then ensure the load is properly balanced and the slings are properly positioned.
Ä WARNING!
• Loads may disengage from crane scale hook and shackle or lifting eye if proper procedures are not
followed.
• A falling load may cause serious injury or death.
• The crane scale hook must always support the load.
• The load must never be supported by the latch.
• Never lift more than the crane scale's assigned Working Load Limit (WLL) rating.
• Read and understand the instructions in this manual before using the crane scale.
Safe Loading and Rigging Guidelines During Loading Procedures
CF 34 1 LTL 720 Safety Manual
CF 34 2 LTL 720 Safety Manual
RECOMMENDED INSPECTION PROCEDURES
Initial Inspection
Prior to use, all crane scale hook and shackle or lifting eyes should be inspected.
Load Train Visual Inspection Suggestions
• Always visually inspect scale load bearing components before using.
• Check for distortion such as bends, twists and spread. • Inspect for wear such as peening, nicks, gouges,
cracks, corrosion and thread damage.
• Magnetic Particle or Dye Penetrant crack detection of all components of the load train assembly should be
conducted annually. If the crane scale hook, shackle or lifting eyes are painted, visual inspection should
take this coating into consideration. Surface variations can disclose evidence of heavy or severe use that
requires more detailed analysis. The surface condition may, in such instances, call for stripping the paint.
• Annual inspection of the load sensor by an Authorized Distributor is strongly recommended.
Causes of Damage to Hooks, Shackles, Lifting Eyes and Load Cells
Cause Resultant Damage
Heavy use Wear
Dragging across floors Wear
Shock loading Distortion
Corrosion Reduction of structural material
Corrosion Damage to threads
Welding Destruction of heat treat
Overloading Distortion
Improper use of multiple slings Distortion
Tip loading, side loading, back loading Distortion
CF 34 3 LTL 720 Safety Manual
Important Safety Information
Do not use any load bearing component that is worn beyond 5% of original dimension. Remove from service any
load bearing component with a detected crack.
Visual Inspection of Shackles
• Check for distortion such as bends, twists and spread.
• Look for peening, nicks and gouges.
• Inspect for cracks or corrosion.
• Check for thread damage.
If any of the preceding conditions exist, remove shackle from service.
Scale Hook Inspection
The following is a guideline to be used for the examination of scale hooks. Common inspection methods that may
be used are visual, magnetic particle and dye penetrant.
CF 34 4 LTL 720 Safety Manual
Note: Never use a hook whose throat opening has been increased, or whose tip has been bent more than 10º 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.
Field Inspection and Repair
Examine crane scale hook for excessive wear. A scale hook showing a wear-reduction greater than a 5% value
should be removed from service.
• Examine crane scale hook for nicks and gouges.
• Examine crane scale hook periodically by magnetic particle and/or dye penetrant test methods, or more
often in severe operating conditions. Hooks found to contain cracks should be removed from service.
• Never repair, alter, rework, or reshape any load bearing component by welding, heating, burning or
bending.
Recommended Preventive Maintenance
Recommended Preventive Maintenance
Initial Inspection
Prior to use, all crane scale hook and shackle or lifting eyes should be inspected.
Frequent and Periodic Inspection
Inspection procedures and record keeping requirements for crane scale hook shackle and lifting eyes in regular
service shall be governed by the type of equipment with which they are used.
Operator Inspection
Visual examination by the operator or other designated person; records not required.
Normal___Monthly
Heavy___Weekly
Designated Person Inspection
Visual inspections by a designated person making records of apparent external conditions to provide the basis for
continuing evaluation.
Normal___Annual
Heavy___Semiannual
Severe___Quarterly
14
Important Safety Information
Repairs of cracks, nicks and gouges shall be carried out by an authorized designated person. All other repairs
should be performed by the manufacturer.
Never repair, alter, rework or reshape any load bearing component by: welding, burning, heating or bending.
Remove from service any load bearing component with wear or repair that reduces the original dimension by more
than 5%.
CF 34 5 LTL 720 Safety Manual
Magnetic Particle and/or Dye Penetrant Inspection and Surface Preparation
Inspect scale hook, shackle and lifting eye with magnetic particle and/or dye penetrant annually, or more often in
severe operating conditions.
Annual inspection of load sensor by an authorized Distributor is strongly recommended.
Ä WARNING! Loads imposed on this product should never exceed the maximum rated capacity shown and apply
only to uniform direct tension loading. Off-axis loading, bending, side loading and shock loads should be avoided.
Damage caused by such, are outside of our warranty. Inspection for wear and cracks on all load-bearing
components should be conducted annually.
Load bearing components showing defects should be discarded. Continued use of defective components may
result in catastrophic failure and personal injury.
Unless authorized by the factory in writing, changes by anyone except the factory such as cutting, welding or
permanently attaching other material or products cancels all warranty.
WARRANTY REPAIR POLICY
Limited Warranty On Products
Any Cooper Instruments product which, under normal operating conditions, proves defective in material or in
workmanship within one year of the date of shipment by Cooper will be repaired or replaced free of charge provided
that a return material authorization is obtained from Cooper and the defective product is sent, transportation
charges prepaid, with notice of the defect, and it is established that the product has been properly installed,
maintained, and operated within the limits of rated and normal usage. Replacement or repaired product will be
shipped F.O.B. from our plant. The terms of this warranty do not extend to any product or part thereof which, under
normal usage, has an inherently shorter useful life than one year. The replacement warranty detailed here is the
buyer’s exclusive remedy, and will satisfy all obligations of Cooper whether based on contract, negligence, or
otherwise. Cooper is not responsible for any incidental or consequential loss or damage which might result from a
failure of any and all other warranties, express or implied, including implied warranty of merchantability or fitness for
particular purpose. Any unauthorized disassembly or attempt to repair voids this warranty.
Obtaining Service Under Warranty
Advance authorization is required prior to the return to Cooper Instruments. Before returning the item, contact the
Repair Department c/o Cooper Instruments at (540) 349-4746 for a Return Material Authorization number.
Shipment to Cooper shall be at buyer’s expense and repaired or replacement items will be shipped F.O.B. from our
plant in Warrenton, Virginia. Non-verified problems or defects may be subject to a $100 evaluation charge. Please
return the original calibration data with the unit.
Repair Warranty
All repairs of Cooper products are warranted for a period of 90 days from date of shipment. This warranty applies
only to those items that were found defective and repaired; it does not apply to products in which no defect was
found and returned as is or merely recalibrated. It may be possible for out-of-warranty products to be returned to
the exact original specifications or dimensions.
* Technical description of the defect: In order to properly repair a product, it is absolutely necessary for Cooper to
receive information specifying the reason the product is being returned. Specific test data, written observations on
the failure and the specific corrective action you require are needed.
CF 34 6 LTL 720 Safety Manual
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