Mack U 1988

• Recall 19520 [USA]: In the event the primary throttle return fails, failure of the secondary throttle return system would not provide protection against loss of throttle control.
  Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.
  a new production secondary throttle return system configuration will be installed.
  system: fuel; fuel pump.Vehicle description: class 8 trucks equipped with e6 and e7 engines with robert bosch p7100 mechanically-governed fuel injection pumps.Note: if your vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided within a reasonable time and free of charge or the remedy does not correct the defect or noncompliance, please contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.

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• Recall 25013 [USA]: System: steering wheel retaining nuts.vehicle description: heavy duty trucks. consequence of defect: this could cause steering
  Steering wheel retaining nuts may have been improperly installed and/or torqued.
  renew and retorque steering wheel retaining nuts.
  system: steering wheel retaining nuts.Vehicle description: heavy duty trucks. Consequence of defect: this could cause steering wheel disengagement from the steering column with loss of steering control which could result in anaccident.

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• Recall 25281 [USA]: Under certain conditions, hose could fail resulting inloss of power steering assist and possibly an accident.
  An incorrect high pressure power steering hose may have been installed.
  replace incorrect power steering hoses.
  system: power steering hose.Vehicle description: heavy duty trucks equipped with stratoflex high pressurepower steering hose.

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• Recall 26939 [USA]: This would allow the pitman arm to come off the steeringgear sector shaft and result in immediate loss of steering control and a vehiclecrash could occur.
  Some of the nuts/bolts used to fasten the steering pitman arm may loosen.
  retorque nuts/bolts where necessary.
  system: steering pitman arm.Vehicle description: heavy duty trucks.

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• Recall 27826 [USA]: If clamp plate breaks, yoke would fly off at detachedpoint and could injury anyone struck by flying fragments. also, the detachedinner shaft could interfere with the brake system air supply hoses and tractortires, which could result in loss of truck control and an accident.
  Clamp plates used between the drive shaft and carrier yokes may crack and could break due to improper heat treatment.
  install new clamping plates and capscrews in all locations as needed.
  system: drive shaft yoke clamp plates.Vehicle description: heavy duty trucks.

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• Recall 1990005 [Canada]: Steering
  The high pressure power steering hose may not meet the rated burst strength pressure requirements. Hose failure with subsequent loss of steering power assist and increased steering effort could result, possibly leading to a vehicle crash without prior warning. Correction: power steering hoses will be inspected and replaced if found to be of incorrect psi rating.

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• Recall 1989087 [Canada]: Steering
  Note: vehicles manufactured at the winnsboro, south carolina facility. The steering wheel retaining nuts may have been improperly installed and/or torqued. If either of these procedures occured, it is possible that the steering wheel could disengage itself from the steering column causing loss of steering control. Correction: steering wheel retaining nuts will be replaced and retorqued on all affected vehicles.

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• Recall 1988117 [Canada]: Steering
  Some of the nuts/bolts used to fasten the steering pitman arm may loosen and could cause loss of steering control and a vehicle crash without prior warning. Correction: the nuts/bolts will be inspected for correct torque and retorqued where necessary.

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To ensure accuracy and for your safety, it is recommended to do a free VIN recall check here or here [USA] - UK - Canada.

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