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Recall 1985138

Brakes · Mack · published 4 Dec 1985

146Vehicles affected in Canada
3Models
1984–1985Model years
Truck - Med. & H.D.Safety Mfr

The issue

THE AXLE MOUNTED SUPPORT BRACKET FOR THE QUICK RELEASE VALVES MAY CRACK RESULTING IN THE VALVES BEING SUPPORTED ONLY BY STEEL AIR LINES. THIS COULD CAUSE FATIGUE FAILURE OF THE STEEL AIR LINES LEADING TO THE REAR PARKING BRAKES AND CHASSIS SERVICE BRAKES. THE SUDDEN LOSS OF AIR TO THE BRAKE CHAMBERS WILL RESULT IN AUTOMATIC ACTUATION OF THE SPRING LOADED REAR PARKING BRAKE AND SUDDEN REAR WHEEL LOCK-UP. THIS COULD RESULT IN LOSS OF VEHICLE CONTROL AND A CRASH WITHOUT PRIOR WARNING.

Description (français)

La bride support des soupapes de détente rapide, montée sur l'essieu, peut se fissurer et se briser, ce qui laisse les soupapes suspendues par leurs conduites d'air en acier. Ces conduites d'air, qui alimentent les freins de stationnement arrière et les freins de service, peuvent alors se briser par fatigue. Une perte soudaine de pression dans les chambres à air des freins entraîne l'application automatique des freins de stationnement et le blocage des roues arrière. Cela peut provoquer la perte de maîtrise du véhicule et un accident est alors possible.

Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada · official text, unchanged

Vehicles covered

Make and modelModel years
Mack Midliner1984, 1985
Mack MS2501984, 1985
Mack MS3001984, 1985

Model years in this recall

NHTSA complaints and the number of recall campaigns for each model year this recall covers.

ModelYearComplaintsRecallsComplaints about brakes
Mack MS250198501—