2009-01-09 Reach Lock Inspection

Safety Alert Type: 
Log Hauling
Kamloops Area
Date of Incident / Close Call: 
Company Name: 
Roga Contracting Ltd.
Details of Incident / Close Call: 

While hauling logs with a quad-axle trailer, the driver was loaded and had extended the reach on the trailer and placed the reach lock in the lock position. The driver did not inspect the “reach lock” pin to ensure it had locked properly in a locked position and assumed that it was locked because he was able to back up without the reach sliding. Visual inspection would have revealed that the reach was jammed on the stop plates.

When the tractor-trailer started up the hill, the load weight put “pulling” pressure on the reach. The stop plates failed, allowing the reach to pull out of the barrel. The trailer disengaged from the tractor, rolled backward down the hill and fell over.

No injuries resulted from the incident. Potential for injury was high.

The driver was in sound mind at the time of the incident. 


Contributing Factors:
  • Welds on some of the stop plates had broke, causing the lock pin hole to not line up. Because the lock pin was not engaged due to stop plates failure, it allowed the reach to slide out all the way when a load was put on it and travel commenced.
  • Driver did not inspect the “reach lock” pin to ensure it was in a locked position before leaving the loader.


Learnings and Suggestions: 


  • Should visually inspect that their reach lock is fully engaged before proceeding to travel with the trailer down. If the lock is not properly engaged it should be determined why and remedied immediately.
  • Please note that there are many reasons for a reach lock to not engage such as a broken booster or frozen systems In this incident, it was missing or faulty stoppers.
  • Should not rely on trying to slide the reach as an indicator of the reach lock being fully engaged because the reach could be jammed for the moment and provide a “false positive.”

Mechanics / Maintenance Coordinator

  • Should inspect stop plates and other safety devices when performing regular maintenance.
  • Should perform repairs and document repairs when inspection shows sign of wear or distress.


For more information on this submitted alert: 

 Roga Contracting Ltd.

(250) 851-3676

File attachments
2009-01-09 Reach Lock inspection.pdf
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