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CapabilitiesDesign Engineering and Manufacturing of Lifting DevicesCustom Mobile Crane
Repair, Rebuild, Recertification,
and Reverse Engineering of Lifting Equipment
Past Turnkey ProjectsDesign and Manufacturing of a Backup Roll Lifter for the Steel IndustryDesign and Manufacturing of an Inconel Coil Lift Beam for the Steel IndustryDesign and Manufacturing of a Motorized Drum Lifter for the Steel IndustryField Inspection of Lifting Devices for the Steel IndustryDesign and Manufacturing of Motorized Ring Tong for the Ring Forging IndustryDesign and Manufacturing of a hydraulic Sheet Lifter for the Metal Processing IndustryRepair of Straddle Carrier for the Heavy Steel IndustryRepair, Modification, and Certification of Double Grip Coil Tong for the Silicon Steel Industry
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Repair of Straddle Carrier for the Heavy Steel Industry

Repair of Straddle Carrier for Heavy Steel Industry
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Repair of Straddle Carrier for Heavy Steel Industry

A steel manufacturer was experiencing problems with the gripping levers on their straddle carrier trucks. The levers had several cracks and in some cases failures. Along with input from the customer, Hunter Lift engineers used their expertise to assess and rectify the issues. Components of the gripping levers were evaluated for stress concentrations and possible fatigue failures. The broken ears were replaced with new ears, utilizing larger bosses and full penetration welds. Some of the high stressed plate was replaced with heavier plate and additional gussets. The main pivot pin housing was replaced with heavy wall alloy tubing to prevent welds from cracking. Upon completion, the straddle carrier was analyzed by a NDT technician to verify weld integrity. The redesigned lever has resulted in a lower repair cost and less down time for maintenance.

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Project Highlights for Repair of Straddle Carrier

Product NameStraddle Carrier
Product DescriptionOur client was experiencing failures with the gripping levers of their straddle carriers. The levers were sent to Hunter Lift for evaluation and subsequent modification
Capabilities Applied/ProcessesEngineering
  • Components of Levers Evaluated for Stress Concentrations and Possible Fatigue Failures
  • The Broken Ears Were Replaced
    • Utilizing Larger Bosses and Full Penetration Welds
  • High Stressed Plates Were Replaced with Heavier Plates with backup Gussets
  • Main Tube Pin Housing was Replaced with Heavy Wall Alloy Tubing
    • Prevents Welds from Cracking
  • Fatigue Analysis
  • Dynamic Analysis
  • Stress Analysis
Weight Capacity150 Tons
Industry for UseHeavy Steel
Delivery Time12 weeks
Standards MetASME B30.20
AWS D14.1
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