Mack U Series 1980

Model U Series made in 1980 by Mack got 4 recalls. There were some recalls concerningparking brake, service brakes, air and steering.

Model 1980

Recalls


CampaignManufacturerManufacturing dateType# of units affectedDate Owner notified MfgRecall Initiated byManufacturers of recalled vehicles/productsReport Recieved DateRecord Creation DateRegulation Part NumberFMVSS Number
PARKING BRAKE - DRIVELINE - AIR
80V052000MACK TRUCKS, INCORPORATEDfrom 07/01/1979 to 01/01/1980V (Vehicle)966610/20/1980MFRMACK TRUCKS, INC05/06/198007/18/1980
Defect SummaryOn certain vehicles, the knob that operates the tractor park valve may break off, rendering the valve inoperable.
Consequence Summary
Corrective SummaryDefective knobs will be replaced with an improved type, without charge to owner.
NotesVehicle description: trucks.system: service brakes; tractor park valve control knob.consequences of defect: the purpose of the tractor park valve is to allow thedriver to apply the tractor spring emergency/parking brake independently of thetrailer emergency parking brakes. if the knob is broken, the tractor parkingbrakes cannot be applied. if parked on an incline and left unattended, vehiclecould roll free and cause accident and injury.
SERVICE BRAKES, AIR - CONTROLS - HAND CONTROL
81V088000MACK TRUCKS, INCORPORATEDfrom 07/01/1979 to 01/01/1980V (Vehicle)1000012/21/1981MFRMACK TRUCKS, INC07/08/198107/14/1981
Defect SummaryThe retaining pin for the brake control knob has been misaligned (off the center line of the valve plunger hole). this causes the knob to be overstressed at the retaining pin hole area causing it to separate from the valve.
Consequence Summary
Corrective SummaryThe holes will be retooled to provide correct alignment and plastic knobs will be replaced by knobs of stronger material having metal reinforcements.
NotesVehicle description: trucks equipped with brake control knobs.system: service brakes; knob retaining pin.consequences of defect: with the knob broken off, the control valve wouldbecome difficult or impossible to operate. one or a combination of brakeapplications would not be possible and the vehicle could be parked in an unsafecondition. an accident and personal injury could result.
STEERING - GEAR BOX (OTHER THAN RACK AND PINION)
80V054000MACK TRUCKS, INCORPORATEDfrom 07/01/1976 to 01/01/1980V (Vehicle)10901/31/1981ODIMACK TRUCKS, INC05/06/198005/16/1980
Defect SummaryThe prefabricated pinch bolt clamp at the lower steering shaft lower yoke may not perform adequately when tightened to specifications. the clamp may then deform and loss of clamping force and steering shaft disengagement may result.
Consequence Summary
Corrective SummaryDealer will retrofit with lower steering shaft lower yokes that provide for integral pinch bolt installation in place of previous separately fabricated clamp for the pinch bolt.
NotesVehicle description: trucks.system: steering; power steering shaft; fabricated pinch bolt clamp.consequences of defect: disengagement of the steering shaft may cause loss ofvehicle control without prior warning and, possibly, an accident.
STEERING - WHEEL AND HANDLE BAR
82V019000MACK TRUCKS, INCORPORATEDfrom 04/01/1980 to 01/01/1982V (Vehicle)2202/24/1982MFRMACK TRUCKS, INC03/02/198203/12/1982
Defect SummaryCertain vehicles may be subject to steering shaft separation due to loose set screws in the dash sheet bearing which may allow the shaft to move.
Consequence Summary
Corrective SummaryDealer will inspect and modify the steering shaft by providing a greater slip length in the steering drive shaft to eliminate slip joint separation.
NotesVehicle description: trucks equipped with sgp5/ross steering gear.system: steering; steering shaft slip joint.consequences of defect: steering shaft disengagement during vehicle operationmay cause loss of steering control and a vehicle accident.