Renfroe R Clamp, Application, Operation And Maintenance Manual

Page 1: ...WARNING Before putting tool in service take to your immediate supervisor Model R RO Clamp Application Operation and Maintenance Manual OM 480 R RO RENFROE Model R Model RO ...

Page 2: ...INCORPORATED of Jacksonville Florida has been an international leader in the manufacture and mar keting of Lifting Clamps for over fifty years RENFROE products are manufactured in Jacksonville Florida A worldwide network of stock ing distributors provides a readily available source of supply and service J C RENFROE SONS INCORPORATED Jacksonville Florida 32201 Telephone 904 356 4181 Toll Free 1 800...

Page 3: ...H IS NOT SPECIFICALLY AND PARTICULARLY CONTAINED HEREIN PLEASE REFER TO THAT STATEMENT FOR REPRESENTATIONS AND WARRANTIES OF PRODUCTS MANUFACTURED BY J C RENFROE SONS INC WARNING Prior to selection operation and or maintenance of RENFROE products read and understand the infor mation provided in this manual The understanding and use of the Definitions are important in determining the limitations an...

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Page 5: ...d maintenance instructions outlined in this manual and use RENFROE replacement parts to assure proper operation of the clamp 8 DON T Side load NEVER lift from side with vertical clamp 9 DON T Lift over workmen NEVER lift over Safety Areas or person nel 10 DON T Misuse NEVER lift plate from bottom of plate stack 11 DON T Rush Never lift more than one plate at a time with a vertical clamp 12 DON T I...

Page 6: ...tes positioned horizontally to the floor level The rigging attached to clamps is generally multi legged slings with the connecting point of the slings being approximately centered between the distance separating the clamps Refer to illustrations shown below WARNING The capacity of all hori zontal clamps is based on a sling angle of sixty degrees 60 See illustration below Sling angles less than six...

Page 7: ...er use a clamp on a member whose thickness is less than or greater than the range of jaw opening stenciled on the clamp OPERATING TEMPERATURES Unless specified under the Application Section of the individual model the approved operating temperature of RENFROE clamps is from zero de grees Fahrenheit 18 Celsius to a maximum of 200 degrees Fahrenheit 93 degrees Celsius The minimum and maximum tempera...

Page 8: ...KING WEDGE is a fluted steel wedge that is driven in place with a hammer The body of the wedge is positioned in a slot in the clamp body with the fluted edges contacting the member to which the clamp is being attached Refer to Operation Section of specific models of the Locking Wedge clamps for additional details Typical Locking Wedge clamps are Model A1 B1 B2 and PB LOCKING SCREW Lock Screw clamp...

Page 9: ...erform those specific duties QUALIFIED PERSON A person who by possession of a recognized degree in an applicable field or certificate of profes sional standing or who by extensive knowledge training and experience has successfully demonstrated the ability to solve problems relating to the subject matter at hand ...

Page 10: ...a Lock Open Lock Closed feature which facilitates attaching and removing the clamp from the plate The Model RO is available with a Lock Open Only feature allowing the clamp to be Locked Open lifted onto a Hot plate and the lock released by use of a Tag Line attached to the locking pin allowing the operator to be further away from the Hot plate Refer to Definitions Page 2 for explanation of Lock Op...

Page 11: ...or wear and defects Gripping surfaces must be sharp and free of foreign matter D Some models of the R incorporate swivel jaws while others incorporate die blocks 1 Swivel Jaws Swivel jaws should turn freely Inspect swivel jaw mounting hole in body for elongation indicating overload or excessive wear 2 Die Blocks The retaining bolts must be tight and free of damage C Inspection condition of body fo...

Page 12: ... the operation of the clamp and its ability to maintain a proper position on the plate Never attach crane hook directly to the clamp always use sling between crane hook and clamp Step 5 Model with Lock Open Lock Closed feature Move lock handle to Lock Open position Gripping cam is maintained in a retracted position Refer to Illustration A Model with Lock Open Only feature Move gripping cam to the ...

Page 13: ...ing mechanism is actu ated Do not allow inside of jaw opening to rest on edge of plate Maintain 1 2 clearance Refer to Illustrations A and B Step 5 Position clamp so direction of force applied by the crane is in line with the lift ing shackle WARNING Never exceed ten degree side loading Refer to Photographs C D E F and G Illustration B ...

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Page 15: ...el R locks have multiple spring tensions for various capacities WARNING Use proper spring tension for plate thickness being lifted Refer to Illustration H R 35 Ton 4 plate variation two tension positions First two inches of plate thickness use maximum tension position Second two inches of plate thick ness use minimum tension position Example Clamp rated 1 4 4 1 4 plate thickness Use maximum tensio...

Page 16: ...sion position Example Clamp rated 8 to 14 plate thickness use maximum tension on plate 8 to 9 1 2 thick Next to maximum tension position on plates above 9 1 2 to 11 thick Next to minimum tension position on plates above 11 to 12 1 2 thick and minimum tension position on plate above 12 1 2 to 14 thick Spring now exerts force on gripping cam WARNING Lift only when clamp is in Lock Closed position Mo...

Page 17: ...ition relax lifting force move gripping cam to retracted position by manually operating shackle insert lock stop pin lift clamp from plate Refer to Illustration B Step 5 Step 11 Inspect clamp Remove from service if in need of repair WARNING In the event the stenciling is worn and not legible or the tag containing the model capacity or other pertinent information is miss ing do not use clamp until ...

Page 18: ...ification and warn ing tags are present and legible Do not use the clamp if the tags are missing or illegible Inspect master link and link chain legs for wear and damage Inspect circular body of clamp for wear distortion and damage Inspect lock handle mechanism for wear distortion or damage Remove any clamp from service in need of repair WARNING Do not use the clamp if in need of repair If during ...

Page 19: ...on is due from the time the clamp is returned to service See the table below Normal Service One Year Heavy Service 6 Months Severe Service 3 Months Warning If any hazardous condition is found that may cause injury to the operator or other personnel then the clamp should be subjected to a Pe riodic Inspection by a Qualified Person Repair replacement of worn parts During regular maintenance when rep...

Page 20: ...ocated inside of body Guide slots must be smooth and free of indentions to prevent shackle slide from hanging C Inspect all pin holes for wear and elongation D Inspect inside jaw opening for displaced metal and distortion E Inspect clearance of lock handle assembly mounting hole for wear Clear ance with shaft of lock handle assembly should be minor F Some models of the R incorporate swivel jaws wh...

Page 21: ...ng is set in the position of maximum tension without material in the clamp To put the clamp in the maxi mum position with clamp fully assembled adjust lock spring assembly until adjusting slot nearest to spring engages the shaft on the lock assembly and the lock handle is moved to the Lock Closed position Refer to exploded view WARNING Replace lock spring assembly that is damaged or if the spring ...

Page 22: ...ct shackle pin hole for wear and elongation An elongated shackle eye indicates overloading Elongated shackle pin holes indicate wear and possible overloading WARNING Replace shackle that have elongated shackle eye are worn or distorted and have elongated shackle pin holes Step 10 DIE BLOCK R 8 and RH 8 SWIVEL JAW A Inspect die block swivel jaw for fractures damage and wear Serrations must be sharp...

Page 23: ...lt nut and sleeve if worn or damaged Step 12 LOCK STOP BOLT R 13 A The lock stop bolt is not supplied on all capacities Some models have stops welded in place B Inspect lock stop bolt Make certain the bolt is in place and tight WARNING Replace damaged or missing lock stop bolts Step 13 SHACKLE PIN SLIDE R 14 A Inspect slide for damage and wear B Inspect shackle pin hole in slide for wear and elong...

Page 24: ...ll retaining pins and fasteners must be in place GENERAL RENFROE products may be returned to the factory for inspection and repair in accordance with an established fee schedule Use only RENFROE replacement parts to insure maximum efficiency and safety factor originally built into the product Refer to RENFROE catalog for instruction on ordering replacement parts WARNING Do not weld grind of modify...

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Page 26: ...IED WHICH EXTEND BE YOND THE DESCRIPTIONS OR STATEMENTS CONTAINED IN THE FACE OR ANY PART HEREOF J C RENFROE SONS INC P O Box 4279 1926 Spearing Streeet Jacksonville Florida 32206 Phone U S A Toll Free 800 874 8454 904 356 4181 Facsimile 904 354 7865 Internet www jcrenfroe com ...