MSI CRANE SCALE User manual

MSI
CRANE SCALE
SAFETY
AND
PERIODIC
MAINTENANCE
MANUAL
Safe Rigging, Loading and Operation
Including Suggested Inspection
and Maintenance Procedures
MODEL
SERIAL NUMBER
Measurement Systems International
www.msiscales.com

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Table of Contents
Forward ................................................................................3
Safe Operating Guidelines ....................................................4
Operating suggestions .......................................................4
Handling hoist motion ........................................................4
Safe Loading and Rigging Guidelines....................................5
Loading Procedure "Do's" & "Don'ts" - Illustrations .......... 6-8
Recommended Inspection Procedures .................................8
Load Train Visual Inspection Suggestions .............................9
Visual Inspection of Shackles ................................................9
Shackle Field Inspection Areas .......................................... 10
Shackles with Excessive Wear ............................................10
Improper Replacement of Pins in Shackle.......................... 11
Overloaded Shackle ............................................................11
Shackle Eye with Twist ........................................................11
Scale Hook Inspection .................................................. 11-12
Field Inspection and Repair .................................................12
Recommended Preventive Maintenance ....................... 13-14
Notes ................................................................................. 15
Forward
This manual has been prepared to provide information and
suggestions for safe operation, rigging, inspection, and
maintenance of Measurement Systems International (MSI)
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 manu-
facturer. However, a thorough study of the following informa-
tion 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.

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Safe Operating Guidelines
Before operating a MSI crane scale, the scale operator should
carefully read and study the appropriate Operation Manual
supplied by MSI 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 responsibil-
ity 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.

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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.
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.
In-line Loading
• CAPACITY RATINGS ON THE
CRANE SCALE ARE FOR IN-LINE
LOADING.
• USE HARDWARE THAT CREATES
SINGLE POINT ATTACHMENTS
AND ALLOWS THE SCALE
FREEDOM OF ALIGNMENT.
Safe Loading and Rigging Guidelines

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DO NOT
PUSH OR PULL A LOADED SCALE
AND DO NOT PULL LATERALLY ON
THE HOOK WITH SCALE LOADED.
DO NOT
USE INTERFACE HARDWARE THAT
IS OVERSIZED. IT RESTRICTS
SINGLE POINT LOADING AND SELF
ALIGNMENT AND MAY RESULT IN
OFF-AXIS LOADING.
DO NOT
SIDE LOAD, BACK LOAD OR TIP LOAD A CRANE SCALE HOOK.
During Loading Procedures
SIDE LOAD BACK LOAD TIP LOAD
INCORRECT INCORRECT INCORRECT

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Loading the Scale Hook
with two sling legs.
DO NOT
USE MULTIPLE ATTACHMENTS WITHOUT
THE PROPER HOOK UP OF A SHACKLE.
• USE BOTTOM SHACKLE WITH
HOOK FOR TWO SLING LEG LOADING.
• NEVER EXCEED 120°INCLUDED
ANGLE.
• SHACKLE LOAD RATING IS BASED ON
LOAD REGARDLESS OF INCLUDED
ANGLE, AS LONG AS INCLUDED
ANGLE IS LESS THAN 120°.
Scale with Multiple
Attachments
USE A SHACKLE WHEN MULTIPLE
ATTACHMENTS ARE PLACED OVER A
SCALE HOOK.
CORRECT

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Causes of Damage to Hooks, Shackles, Lifting Eyes and Load Cells
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
Add Washers to Shackle Reversed Shackle
Off Center Loading
Recommended Inspection Procedures
ADD
WASHERS
TO CENTER
THE LOAD.
▼CAUSE ▼RESULTANT DAMAGE
ALWAYS MAKE SURE THE HOOK
SUPPORTS THE LOAD.
THE LATCH MUST NEVER SUPPORT
THE LOAD.
Scale Hook with Latches Scale Hook with Latches
POOR PRACTICE
GOOD PRACTICE
CORRECT INCORRECT

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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 eye 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
MSI Distributor is strongly recommended.
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.

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Shackle Field Inspection Areas
Shackle with Excessive Wear
Improper Replacement of Pins in Shackle
• LOOK FOR IMPROPER
REPLACEMENT OF
PINS.
• NEVER REPLACE A PIN
WITH A BOLT OR ANY
OTHER FASTENER.
CHECK FOR WEAR
CHECK FOR WEAR AND
STRAIGHTNESS
CHECK THAT PIN IS
SEATED
CHECK SHACKLE
FOR OPENING
CHECK
FOR
WEAR

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Overloaded Shackle
Shackle Eye with Twist
If any of the preceeding 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 which may be used are:
Visual, magnetic particle and dye penetrant.
BENT PIN AND
ELONGATED BOW.
CHECK FOR EAR
ALIGNMENT.

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Scale Hook Inspection
Scale Hook with 10 Degree Maximum Twist
• A MAXIMUM OF A 10°TWIST IN THE SCALE HOOK POINT TO THE
BODY OF THE SCALE HOOK MAY BE TOLERABLE.
Note: Never use a hook whose throat opening has been
increased, or whose tip has been bent more than 10°
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.
CHECK FOR WEAR, CRACKS
AND TWISTING
CHECK FOR WEAR
AND DEFORMATION
CHECK FOR
SPREADING
CHECK FOR
CRACKS AND
TWISTING

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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
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 / Manufacturer
Visual inspections by a designated person making records of
apparent external conditions to provide the basis for continu-
ing evaluation.
Normal Annual
Heavy Semiannual
Severe Quarterly
Calibration
Normal Annual
Heavy Semiannual

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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%.
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 MSI
Distributor is strongly recommended.
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.

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Notes

PUB.243-08-94D Printed in U.S.A.
Measurement Systems International
Integrated System Solutions for
Industrial Weighing and Process Control
14240 Interurban Avenue South STE 200
Seattle, Washington 98168-4661 U.S.A.
206 433-0199 •Fax: [phone]
Web: www.msiscales.com •Email: [email protected]
© 2003 by Measurement Systems International, Inc.