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Repair of Straddle Carrier

Repair of Straddle Carrier

Repair of Straddle Carrier
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Repair of Straddle Carrier for the 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 plates were replaced with heavier plates 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 an NDT technician to verify weld integrity. The redesigned lever has resulted in a lower repair cost and less downtime for maintenance.

Straddle Carrier

Our client was experiencing failures with the gripping levers of their straddle carriers. The levers were sent to Hunter Lift for evaluation and subsequent modification


  • 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


  • Components of Levers Evaluated for Stress Concentrations and Possible Fatigue Failures


  • Fatigue Analysis
  • Dynamic Analysis
  • Stress Analysis

Weight Capacity

  • 150 Tongs

Industry for Use

  • Heavy Steel

Delivery Time

  • 12 Weeks

Standards Met

  • ASME B30.20
  • BTH-1
  • AWS D14.1