Safety Alert - Hitachi Dipper Arm Failure
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There was a recent failure of a dipper arm on a Hitachi excavator during operation where fracturing due to fatigue occured on the brackets which are fixed to the upper dipper arm and where the cylinder is connected. This lead in this case to the brackets and therefore cylinders becoming separated from the dipper arm, with the arm dropping uncontrollably.
The manufacturer has issued a Product Alert and more information on the incident can be found at https://www.cpa.uk.net/safetyalerts/