Mack Mh 1983

Model Mh made in 1983 by Mack got 8 recalls. There were some recalls concerningseat belts, service brakes, air and steering.

Model 1983


CampaignManufacturerManufacturing dateType# of units affectedDate Owner notified MfgRecall Initiated byManufacturers of recalled vehicles/productsReport Recieved DateRecord Creation DateRegulation Part NumberFMVSS Number
88V147000MACK TRUCKS, INCORPORATEDfrom 01/01/1982 to 07/01/1988V (Vehicle)1100008/31/1988ODIMACK TRUCKS, INC09/06/198809/19/1988
Defect SummarySeat tether belts may not have been adjusted during assembly.
Consequence SummaryDuring an impact, driver and/or rider can move forwardand possibly strike the windshield, even when wearing a seat belt.
Corrective SummaryAdjust seat tether belt if necessary.
NotesSystem: seat tether belt.vehicle description: heavy duty trucks with air suspension seats.
85V113000MACK TRUCKS, INCORPORATEDfrom 01/01/1982 to 12/01/1984V (Vehicle)502002/07/1986MFRMACK TRUCKS, INC09/17/198509/24/1985
Defect SummaryThe dual double check valve may not release the proper air volume to the brake system, causing a slight timing delay between the tractor and the trailer brake system. consequences of defect: if the brakes are suddenly applied, the trailer could jackknife without warning to the operator, which could result in a vehicle crash.
Consequence Summary
Corrective SummaryInstall two new sleeves in the dual double check valve which will increase air flow.
NotesVehicle description: heavy duty tractor trailer combinations. system: brakes, tractor to trailer.
84V035000MACK TRUCKS, INCORPORATEDfrom 04/01/1982 to 11/01/1983V (Vehicle)850MFRMACK TRUCKS, INC03/23/198404/11/1984
Defect SummaryA manufacturing error resulted in the installation of carbon steel springs in some dual-compartment air reservoir check valves. carbon steel springs are inadequate for this application because they are subject to severe corrosion and subsequent failure of the check valve.
Consequence Summary
Corrective SummaryThe carbon steel spring will be replaced with a stainless steel one.
NotesVehicle description: heavy trucks.system: service brakes; dual compartment air reservoir check valve.consequences of defect: if this check valve failure were combined with asevered line in the primary air system, complete loss of brakes and possiblevehicle crash could occur.
84V033000MACK TRUCKS, INCORPORATEDfrom 11/01/1983 to 02/01/1984V (Vehicle)439311/05/1984MFRMACK TRUCKS, INC03/22/198404/05/1984
Defect SummaryImproper steering clamp bolts and torque applied during installation. the bolt could fail, allowing the steering yoke to become loose.
Consequence Summary
Corrective SummaryInspection and, if necessary, installation of proper steering shaft clamp bolts tightened to specifications.
NotesVehicle description: heavy trucks.system: steering; shaft clamp bolts.consequences of defect: this can lead to complete loss of steering controlwithout warning and possible vehicle crash.
83V100000MACK TRUCKS, INCORPORATEDfrom 04/01/1982 to 09/01/1983V (Vehicle)50709/27/1983MFRMACK TRUCKS, INC09/27/198310/21/1983
Defect SummaryUnder severe strain, a defective weld joining the steering wheel hub to the hub perimeter could fail, causing the steering wheel to separate from the vehicle.
Consequence Summary
Corrective SummaryDefective steering wheels will be replaced at no charge to owner.
NotesVehicle description: trucks.system: steering; steering wheel hub to perimeter weld.consequences of defect: separation of the steering wheel would probably causeloss of vehicle control without warning, possibly resulting in an accident.note: the truck should not be driven until the defective steering wheel iscorrected.
86V008000MACK TRUCKS, INCORPORATEDfrom 04/01/1982 to 03/01/1986V (Vehicle)700008/14/1986MFRMACK TRUCKS, INC01/17/198601/22/1986
Defect SummaryLeft or right cab step may crack in its welded area due to flexing of the step during entering and exiting. consequence of defect: as the cracks extend, the tubular step could partially collapse and break without warning to the user, and could result in personal injuries.
Consequence Summary
Corrective SummaryInstall a reinforcement brace if no cracks are found. in addition, replace step if cracks are present.
NotesSystem: cab step. vehicle description: heavy duty trucks with sleeper cab.
85V051000MACK TRUCKS, INCORPORATEDfrom 04/01/1982 to 04/01/1985V (Vehicle)7500MFRMACK TRUCKS, INC05/01/198505/13/1985
Defect SummaryThe flip out step clevis on the bumper may fail and break under the weight of the person standing on the step to service the front area of the vehicle. consequence of defect: this sudden break will cause the person standing on the step to fall, without warning, and could result in injuries.
Consequence Summary
Corrective SummaryRemove the step clevis and replace with a new improved clevis.
NotesVehicle description: heavy duty ultraliner trucks. system: bumper flip out step clevis.
84V140000MACK TRUCKS, INCORPORATEDfrom 05/01/1984 to 03/01/1985V (Vehicle)64MFRMACK TRUCKS, INC11/07/198412/03/1984
Defect SummaryDue to improper and inadequate welding practices, the fifth wheel on the involved vehicles is defective. frame mounted supports may have incomplete or poor quality welds. the welds could subsequently fail allowing separation of the tractor from the trailer.
Consequence Summary
Corrective SummaryThe dealer will inspect and remove the fifth wheel and reweld the mounting angles at no charge to the owner.
NotesVehicle description: truck tractors.system: structure; fifth wheel assembly.consequences of defect: if the trailer separates during operation an accidentand personal injury could result.