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• Recall 52552 [USA]: Possibility that on some truck- tractors assembled with certain tandem rearaxle suspension com- binations suspension hanger br
  
  
  possibility that on some truck- tractors assembled with certain tandem rearaxle suspension com- binations suspension hanger brack- ets on rear axlehousings may develop cracks after two hundred thousand miles of over-the-roadservice.If this occurs, brackets may eventually fail causing loss of vehiclecontrol.(correct by replacing brackets where neces- sary.)

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Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

• Insufficient weld penetrat investigation # PE88018

  Summary of information from manufacturer:on december 7, 1987, chalmerssubmitted a defect report (87e-038) pertaining to insufficient weldpenetration of the upper torque rod on their 800 series rear suspension.Failure of a weld could have resulted in the rear axle(s) moving out ofposition, resulting in loss of directional control.Seven oems werenotified of the potential defect.Analysis:one of the oems referred to above contacted the office ofdefects investigation and reported that additional problems have beendiscovered on the above mentioned suspension.Allegedly the weldsfastening joint ends to the above mentioned replacement torque rods alsohave poor penetration.Separation of a joint end could allow movement ofthe rear axle out of position, possibly resulting in loss of control of thevehicle.Proposed action:open a pe.Contact the equipment manufacturer and obtaininformation on the new allegation.===
  

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